Windows 7 Services
I will list the services that must be enabled for normal operation Windows 7. This list only applies to computers that are used only at home and are not local network. But still take a close look full list services with a description, as you may need to leave some other services enabled.
Services that must be enabled for WIndows 7 to work. All other services can be disabled to improve Windows performance 7.
How to disable services in Windows 7 is described here:
Hidden text
DHCP client
DNS client
Microsoft. NET Framework NGEN
plug and play
Superfetch
Windows Audio
Windows Card Space
Web client
Secondary login
Print Manager
Credential Manager
Access to HID devices
CNG key isolation
SSDP Discovery
PnP-X IP bus enumerator
Nutrition
Wired autotune
PNRP protocol
Collector Windows events
Application Details
Server
Stream ordering server
Network connections
COM+ Event System
System application COM+
Windows Font Cache Service
Diagnostic Policy Service
Network List Service
SPP notification service
Cryptography Services
Themes
Link layer topology
Remote procedure call
Application Identity
Diagnostic System Assembly
Diagnostic Service Host
ActiveX Installer
Windows Installer
Windows Modules Installer
Below is a complete list with a description Windows Services 7, which are present by default in Windows 7.
In the case of using a computer at home, many of these services are not needed and, accordingly, they can be disabled and thereby increase the performance of the operating system. Windows systems 7.
BranchCache(This service caches network content received from caching hosts on the local subnet) - Manual.
What is BranchCache? is a caching technology that reduces traffic on WAN networks by caching content. It is mainly used in data exchange between the main office and branch offices. For home use, it is completely unnecessary, so you can turn it off.
DHCP client(Registers and updates IP addresses and DNS records for this computer) - Auto
You should not disable the DHCP client, since basically all Internet providers distribute addresses to their clients using DHCP.
DNS client(The DNS client service (dnscache) caches DNS (Domain Name System) names and registers the fully qualified name this computer.) - Disabled. If there is a network - Auto
In principle, a DNS client is also not really needed for a home. Well, its only plus when using it at home is that Internet sites will open 1-2 seconds faster, due to the fact that DNS names are already cached on the computer and the computer will not have to access others DNS servers for an answer.
KtmRm for Distributed Transaction Coordinator(Coordinates transactions between MS DTC and Kernel Transaction Manager (KTM).) - Manually.
KtmRm for the distributed transaction coordinator is a system service and is necessary for the normal functioning of Windows 7. Therefore, we do not touch it.
Microsoft .NET Framework NGEN v2.0.50727_X86(Microsoft .NET Framework NGEN) - Manual.
We do not touch this service.
Parental Controls(This service is a stub for functionality services parental control Windows, which existed in Vista OS.) - Manually.
If you do not use the parental control feature, you can safely disable this service.
plug and play(Allows the computer to recognize changes in installed equipment and adapt to them, either without requiring user intervention, or minimizing it). - Auto
This service should not be stopped, as this service is necessary for the normal functioning of Windows 7
Quality Windows Audio Video Experience(Quality Windows Audio Video Experience (qWave) - a network platform for streaming audio and video in home networks based on IP protocol) - Manually.
Can be disabled. There is no sense from her for the house.
Remote Desktop Configuration(Remote Desktop Configuration) - Manual.
If you don't use Remote Desktop, you can disable it.
Superfetch(Maintains and improves system performance.) - Auto
We leave.
Windows Audio(Managing audio tools for Windows programs.) - Auto.
We leave.
Windows CardSpace (This provides a secure way to create, manage, and disclose digital identities.) - Manually
We leave.
Windows Driver Foundation - User-mode Driver Framework(Managing user-mode driver host processes.) - Manually.
We leave
Windows Search(Indexing content, caching properties and search results for files, Email and other content.) - Auto. If you do not use the search function on your computer, then you can disable this service.
WMI Performance Adapter(Provides performance library information from Windows Management Instrumentation (WMI) providers to clients on the network.) - Manual.
We leave. Required for use by some programs.
WWAN autoconfiguration(This service manages mobile broadband (GSM and CDMA) data cards and embedded modular adapters, as well as connections and automatic tuning networks.) - Manually.
Offline Files(The Offline Files service does the work of maintaining the Offline Files cache) - Manual.
Can be disabled. Relevant for workgroups and domains on laptops. Not needed for home.
Protection Agent network access (The Network Access Protection Service agent collects and manages information about the health of client computers on the network) - Manually.
Can be disabled.
IPsec Policy Agent(Internet Protocol Security (IPsec) supports authentication of caching hosts at the network level) - Manual.
If you do not use IPSec at home (which is unlikely, you can turn it off)
Adaptive brightness control(Designed to monitor the ambient light sensor and adjust the brightness of the monitor in accordance with changes in illumination.) - Manually.
If there is no ambient light sensor on the laptop or monitor, then turn it off.
Windows Backup(Support backup and restore in Windows.) - Manually.
If you do not use the standard backup function of Windows 7, then disable it.
Windows Biometric Service(The Windows Biometric Service is designed to collect, compare, process and store biometric data in client applications without obtaining direct access to biometric samples or equipment) - Manually.
Disable.
Windows Firewall (Windows Firewall helps prevent unauthorized access to your computer over the Internet or network.) - Auto.
Leave the service enabled. If you have a third-party firewall installed, then usually the standard Windows 7 firewall is disabled so that there are no conflicts.
Web client(Allows Windows programs to create, access and modify files stored on the Internet) - Manually.
We leave.
Virtual Disk(Providing management services for disks, volumes, file systems and storage arrays.) - Manually.
If you do not create virtual disks, then disable.
IP Helper Service(Provides tunnel connectivity using IPv6 transition technologies) - Manual.
If you do not use the IPv6 protocol, then disable it.
Secondary login(Allows you to run processes on behalf of another user) - Manually.
We leave.
Grouping network members(Enables multi-party interactions using peer-to-peer grouping.) - Manual.
We leave.
Disk Defragmenter(Provides the ability to defragment disks.) - Manually. You can also leave Auto by setting a schedule for launching.
Leave if you use. If you do not enable regular disk defragmentation, then disable it.
Automatic connection manager remote access (Creates a connection to a remote network when the program accesses a remote DNS or NetBIOS name or address.) - Manual.
We leave.
Print Manager(Download files to memory to print later) - Auto. If there is no printer, then Disabled.
Remote Access Connection Manager(Manages dial-up and virtual private network (VPN) connections from this computer to the Internet or other remote networks.) - Manually.
Leave if you connect to your ISP with VPN.
Desktop Window Manager Session Manager(Provides the launch and maintenance of the desktop window manager) - Auto.
We leave the service.
Network Member Identity Manager(Provides identity services for Peer-to-Peer Name Resolution Protocol (PNRP) and peer-to-peer network grouping) - Manual.
We leave.
Credential Manager(Provides secure storage and retrieval of user credentials) - Manually.
We leave.
Security Account Manager(Starting this service signals to other services that the Security Accounts Manager (SAM) is ready to accept requests.) - Auto.
We leave.
Access to HID devices(Provides universal access to HID devices) - Manual.
We leave.
Windows event log(This service manages events and event logs) - Auto.
If you use the event log, then leave it. If not, we turn it off.
Performance Logs and Alerts(The Performance Logs and Alerts service collects data from local and remote computers according to the specified schedule settings, and then writes the data to a log or issues an alert.) - Manually.
Disable. Not needed for home use.
Software Protection(Allows downloading, installing, and enforcing digital licenses for Windows and Windows apps) - Auto.
We leave.
Windows Defender (Protection against spyware and potentially dangerous programs) - Auto. However, it is still recommended to use third-party products to protect your computer from viruses, since Windows Defender does not properly protect your computer from viruses from the Internet.
CNG key isolation(The CNG key isolation service is hosted in the LSA process) - Manual.
We leave.
Tools Windows controls (Provides a common interface and object model for accessing operating system, device, application, and service management information.) - Auto.
We leave.
Application Compatibility Information(Processing compatibility check requests for applications as they are launched) - Manually.
We leave.
Group Policy Client (This service is responsible for applying settings defined by administrators for computers and users through the Group Policy component.) - Auto.
If the computer is not in the domain (that they lied at home), turn it off.
Changed Link Tracking Client(Supports associations of NTFS files moved within a computer or between computers on a network.) - Auto.
We leave.
Distributed transaction coordinator(Coordination of transactions spanning multiple resource managers such as databases, message queues, and file systems.) - Manually.
We leave.
Windows Presentation Foundation font cache(Optimizes the performance of Windows Presentation Foundation (WPF) applications by caching commonly used font data.) - Manual.
leave.
SNMP trap(Receives trap messages generated by local or remote SNMP agents and forwards them to SNMP management programs running on this computer.) - Manual.
Disable.
Remote Procedure Call (RPC) Locator(In Windows 2003 and earlier Windows versions the "Remote Procedure Call (RPC) Locator" service managed the RPC Name Service database.) - Manually.
We leave.
Routing and remote access(Offers routing services to organizations on the LAN and WAN) - Disabled.
Can be disabled.
IPsec Key Modules for Internet Key Exchange and Authenticated IP(The IKEEXT service contains modules for Internet Key Management (IKE) and Authenticated Internet Protocol (AuthIP).) - Auto.
You can disable the service.
DCOM Server Process Launcher(DCOMLAUNCH service starts COM and DCOM servers in response to object activation requests) - Auto.
We leave.
NetBIOS over TCP/IP support module(Performs NetBIOS support over TCP/IP service (NetBT) and NetBIOS name resolution for clients on the network) - Manual.
You can disable it if you do not use old programs.
Immediate Windows connections - setup recorder (The WCNCSVC service contains Windows Connect Now configuration (Microsoft's implementation of the WPS protocol)) - Manual
We leave.
SSDP Discovery(Detects network devices and services that use the SSDP discovery protocol, such as UPnP devices) - Manually.
We leave.
Discovery of interactive services(Includes user input notification for interactive services, which provides access to dialog boxes created by interactive services, as they appear.) - Manually
We leave.
Computer Browser(Maintains a list of computers on the network and issues it to programs upon request) - Manually.
Disable if there is no local network at home.
Internet Connection Sharing (ICS)(Provides translation services network addresses, addressing, name resolution, and intrusion prevention services for home network or small office network.) - Disabled.
Disable.
Shell hardware definition(Provides notifications for autoplay events on various devices.) - Auto.
We leave.
Core TPM Services(Allows access to the Trusted Platform Module (TPM) that provides hardware-based cryptography services to system components and applications.) - Manual
Disable.
Remote Desktop Services User Mode Port Forwarder(Allows you to redirect printers, drivers or ports for remote desktop connections) - Manually.
Disable.
PnP-X IP bus enumerator(The PnP-X bus enumerator service manages the virtual network bus.) - Manually.
We leave.
Nutrition(Controls power policy and power policy notifications.) - Auto.
We leave.
Task Scheduler(Allows you to set the schedule automatic execution tasks on this computer) - Auto.
If you use some kind of scheduled tasks, leave it. Otherwise, disable.
Media Class Planner(Allows you to set the relative priority of tasks based on system task priorities.) - Auto.
We leave.
Support for the Problem Reports and Solutions Control Panel Item(This service provides viewing, sending, and deleting system-level problem reports for the Problem Reports and Solutions control panel item.) - Manually.
Disable.
Smart Card Deletion Policy(Allows you to configure the system so that the desktop is locked when the smart card is removed.) - Manually.
Disable.
HomeGroup Provider(Performing network tasks related to setting up and maintaining home groups.) - Manually.
If there is no home local group, disable it.
Wired autotune(Wired AutoConfig Service (DOT3SVC) is responsible for IEEE 802.1X authentication of Ethernet interfaces.) - Manual.
We leave.
Software provider shadow copy (Microsoft) (Manages program creation shadow copies volume shadow copy service.) - Manually.
We leave.
Homegroup listener(Change settings local computer related to the configuration and maintenance of connected to home group computers) - Manually.
If there is no home local Windows groups 7 - then disable the service.
PNRP protocol(Enables serverless peer-to-peer name resolution over the Internet) - Manual.
We leave.
Publishing Feature Discovery Resources(Publishes this computer with its resources so that they can be discovered on the network.) - Manually.
Work station(Creates and maintains client network connections to remote servers via the SMB protocol) - Auto
If there is no local network, disable it.
Certificate Distribution(Copies user certificates and root certificates from a smart card to the certificate store current user) - Manually.
If you are not using any programs that require digital signature- turn off.
Extensible Authentication Protocol(EAP)(Extensible Authentication Protocol (EAP) Service) - Manual
We leave.
Windows Event Collector(This service manages persistent subscriptions to events from remote sources that support the WS-Management protocol.) - Manually.
We leave.
Application Details(Provides the execution of interactive applications with additional administrative privileges.) - Manually.
We leave
Server(Provides support for file, printer, and named pipe sharing for this computer via network connection) - Auto.
We leave.
Stream ordering server(Ensures orderly execution of a group of threads over a set period of time.) - Manually.
leave.
Network logon(Provides a secure communication channel between this computer and a domain controller for user and service authentication.) - Manual.
Disable.
Network connections(Manages the objects in the "Network and Dial-up Networking" folder, which displays the properties of the local network and dial-up connections.) - Manually.
We leave.
COM+ Event System(Support for System Event Notification Service (SENS), which automatically propagates events to subscribing COM components.) - Auto.
We leave.
Systemic COM application+ (Managing the configuration and monitoring of COM+ components) - Manually.
We leave.
SSTP Service(Provides support for SSTP (Secure Socket Tunneling Protocol) to connect to remote computers using VPN) - Manually.
If there is a VPN, leave it.
WinHTTP Web Proxy Auto-Discovery Service(WinHTTP implements the HTTP client stack and provides Win32 developers with an API and a COM automation component for sending HTTP requests and receiving responses) - Manual.
We leave.
WLAN autoconfiguration service(The WLANSVC service provides the logic needed to configure, discover, connect, and disconnect local wireless networks according to IEEE 802.11 standards.) - Manually.
We leave if there is WI-FI. If not, you can turn it off.
Basic Filtering Service(The Basic Filtering Service (BFE) is a service that manages firewall policies and IP security (IPsec) policies by applying user mode filtering.) - Auto.
If the firewall is disabled, you can turn it off.
Tablet PC Input Service(Enables pen and handwriting functionality on Tablet PCs) - Disabled.
Windows Time Service(Controls date and time synchronization on all clients and servers on the network) - Disabled.
Download Service Windows images (WIA) (Provides imaging services for scanners and digital cameras) - Manual.
We leave.
Microsoft iSCSI Initiator Service(Manages Internet SCSI (iSCSI) sessions between the computer and remote iSCSI targets) - Manual.
Disable.
Network Save Interface Service(This service sends network notifications (for example, about adding or removing an interface, etc.)) - Auto.
We leave.
Windows Font Cache Service(Optimizes application performance by caching the most frequently used font data) - Manual.
We leave.
Media Center Extender Service(Allows the Media Center Extender to find and connect to your computer.) - Disabled.
Block Level Backup Engine Service(The WBENGINE service is used by Data Backup to perform backup and restore operations) - Manual.
If you do not use standard archiving, disable it.
Service public access to Net.Tcp ports(Allows sharing TCP ports over Net.Tcp.) - Disabled.
General Service network resources player Windows Media
(Sharing Windows Media Player libraries with other network players and plug and play devices.) - Manually.
We leave.
Portable Device Enumerator Service(Applies group policy to removable storage devices.) - Manually.
Disable.
Windows Media Center Scheduler Service(Start and stop recording TV programs in Windows Media Center) - Manually.
Disable if you do not use the recording of TV programs.
Bluetooth support service(Bluetooth service supports discovery and matching remote devices Bluetooth) - Disabled.
Diagnostic Policy Service(The Diagnostic Policy Service allows you to detect problems, fix problems, and resolve issues related to the operation of Windows components.) - Auto.
We leave.
Program Compatibility Assistant Service(Provides support for the Program Compatibility Assistant.) - Manually.
We leave.
User Profile Service(This service is responsible for loading and unloading user profiles) - Auto.
We leave the service.
PNRP Computer Name Publishing Service(This service publishes the computer name using the Peer Name Resolution Protocol) - Manual.
Disable.
Registration Service Windows errors (Allows the sending of error reports in case of termination or hang of the program, and also allows the delivery of available solutions to problems.) - Manually.
Disable.
Windows Media Center Receiver Service(Windows Media Center service for TV and FM reception) - Manual.
We turn it off if we do not use TV and radio viewing through the computer.
Connected Network Awareness Service(Collects and saves network configuration information and notifies programs when this information changes.) - Auto.
We leave.
Network List Service(Identifies the networks to which the computer is connected, collects and stores data about the properties of these networks, and notifies applications of changes in these properties.) - Manually.
We leave.
SPP notification service(Providing activation and software licensing notifications) - Manually.
We leave.
System event notification service(Watches system events and notifies subscribers of the COM+ event system about these events.) - Auto.
We leave.
Service remote control Windows(WS-Management) (The Windows Remote Management Service (WinRM) uses the WS-Management protocol for remote management.) - Manual.
Disable.
BitLocker Drive Encryption Service(BDESVC provides the BitLocker Drive Encryption service.) - Manual.
Disable if you don't use bitlocker.
Application Level Gateway Service(Provides support for a third-party protocol for Internet connection sharing) - Manual.
We leave.
Cryptography Services(Provides four management services: a catalog database service that validates signatures Windows files and allows the installation of new programs) - Auto.
We leave.
Remote Desktop Services(Allows users to connect interactively to a remote computer) - Manual.
If you do not use remote desktop in WIndows 7, disable it.
smart card(Controls access to smart card readers.) - Disabled.
RPC Endpoint Mapper(Provides resolution of RPC interface identifiers to transport endpoints) - Auto.
We leave.
Finite Builder Windows points Audio(Managing audio devices for the Windows Audio service.) - Auto.
We leave.
Telephony(Provides Telephony API (TAPI) support for programs that control telephone equipment on this computer) - Manual.
Disable.
Themes(Management of themes.) - Auto.
Volume Shadow Copy(Controls the creation of shadow copies (state checkpoints) of disk volumes that are used for backup and recovery or for other purposes) - Manually.
Disable if we do not use archiving or function Windows recovery 7.
Link layer topology(Creates a network map containing information about the topology of computers and devices (connections)) - Manually.
We leave.
Remote procedure call(RPC) (The RPCSS service is a service manager for COM and DCOM servers) - Auto.
We leave.
Remote registry(Allows remote users to change registry settings on this computer.) - Disabled.
Application Identity(Determines and verifies the identity of the application.) - Manually.
We leave.
Diagnostic System Assembly(The diagnostics system host is used by the diagnostics policy service to host diagnostics that run in the local system context.) - Manual.
We leave.
Diagnostic Service Host(The Diagnostics Service Host is used by the Diagnostics Policy Service to host diagnostics that run in the context of the local service) - Manual.
We leave.
Generic PNP Device Node(Allows hosting UPnP devices on this computer.) - Manually.
We leave.
Application management(Processing requests for installation, removal and building lists for programs installed through group policy) - Manually.
Disable.
Managing Certificates and Health Key(Provides an X.509 certificate and key management service for the Network Access Protection Agent (NAPAgent).) - Manual.
Disable.
ActiveX Installer(AxInstSV) (Provides User Account Control validation for the installation of ActiveX controls from the Internet and enables management of ActiveX control installation based on Group Policy settings) - Manual.
We leave.
Windows Installer(applications provided by the package Windows Installer(*.msi).) - Manually.
We leave.
Windows Modules Installer(Allows you to install, modify and remove Windows updates and optional components) - Manually.
We leave.
Fax(Allows you to send and receive faxes using the resources of this computer and network resources.) - Disabled.
Background Intelligent Transfer Service (BITS)(Transmits files to background work using idle throughput network.) - Auto(Delayed start.)
We leave.
Discovery Provider Host(The FDPHOST service hosts the network resource discovery providers of the feature discovery component) - Manually.
We leave.
Windows Color System (WCS)(The WcsPlugInService service hosts Windows Color System Color Device Model and 3rd party Palette Mapping Model plug-ins.) - Manually.
We leave.
Security Center(WSCSVC Service (Center Windows Security) monitors the health parameters of the security system and logs them) - Auto (Delayed start.)
You can also disable it if you have a normal antivirus.
Center windows updates (Includes detecting, downloading and installing updates for Windows and other programs.) - Auto(Delay Start)
If you do not use WIndows 7 updates (for example, if you have an unlicensed copy), then disable it.
Encrypted File System (EFS)) (Provides the underlying encryption technology that is used to store encrypted files in volumes file system NTFS.) - Manually.
Disable.
On computers with limited computing resources and small volume random access memory you can use another method and Windows optimizations is to turn off rarely used and unnecessary services operating system.
Settings for Windows 7 and Vista
When developing Windows 8.1 was carried out on a large scale. For this reason, there is simply no point in disabling services for even less memory consumption in the new OS. Before proceeding to the description of the method, it is worth noting that the performance gain from disabling services will be minimal and is completely invisible in systems with a lot of fast RAM (from 2 GB and above). However, this operation can be considered relevant for owners of older computers and low-power laptops equipped with slow hard drives and a small amount of RAM.
As much more effective ways to free up RAM and speed up system performance, we recommend the following articles:, and and file garbage from the system.
Disabling services in Windows 7
Disabling infrequently used services in Windows 7 and Vista will allow the system to free up more RAM, making other applications and services run faster and more stable, and reducing the need for the system to access virtual memory.
On the Internet you can find a lot of advice on disabling almost all system services, however, this approach is often unjustified, because. many services are disabled by default and are started manually as needed. Forced shutdown of such services may cause problems in the future. For this reason, our list of services to disable is much shorter than usual.
Most fast way open the "Services" program - enter its name in the search bar of the "Start" menu. 
And select the "Services" link in the search results. To ensure maximum stability of the system and applications, we strongly recommend using the "Manual" option, when disabling services. This will allow them to run in the future if the need arises.
Before you start disabling services, you can create a system restore point (control panel > system > system protection > create), in case of unforeseen complications, although they are extremely unlikely.
Open Start Menu » Control Panel »
Change the view mode from "Categories" to "Small Icons" if the default is to view Control Panel items by category.
Locate the Administrative Tools icon »
Select Services »
Services Control Interface in Windows 7
To disable the selected service double click the left mouse button on its name. The service control panel will open. Select "Manual" from the "Startup Type" drop-down menu and click the "Stop" button. Save changes by clicking on "OK"
It is absolutely safe to disable the following services:
- Print Spooler if no printer is connected to the computer.
- Service entry Tablet PC
- Remote Desktop Service (TermService)
- Computer Browser
- Support IP Service
- Remote registry
- Terminal Services if you are not using a connection to remote computers.
- (only if you are not using the Ready Boost feature)
- (if you use third party program for defragmentation)
Not all of the services listed above are available in Windows 7, some of them are only available in Windows Vista.
Please note that disabling other services may cause the operating system to become unstable. Do not disable services that are started manually - they are already disabled. We do not recommend disabling the Windows Update service! Be extremely careful and careful when handling this tool!
To fully unlock the full potential of the system, we recommend that you read other useful articles about and Windows setup for maximum performance.
Reliable storage of information is a problem familiar to most modern enterprises, the solution of which always raises the question: how to get a high-quality result at a relatively low cost? Storing documentation in electronic form ensures not only its safety, but also its unhindered availability in real time.
For long-term and reliable storage of archival information in electronic form, Various types information carriers. The main requirement for such media is the exclusion of the possibility of physically making changes to archived data or deleting them. The information carrier must provide a single record and at the same time be able to read information multiple times. These requirements are met by an information carrier of the WORM type - Write Once, Read Many (write once, read many times). Other basic requirements for information media include durability and maximum capacity archival data storage.
Hard disks.
Application hard drives allows you to organize the so-called "operational" storage of archival data, which provides permanent on-line access to archival documents. The core of such a storage is a multi-level archival data storage architecture, in which frequently requested archival data is stored on "fast" hard drives With external interface Fiber Channel (FC) or Serial Attached SCSI (SAS), and rarely requested archival data is stored on "slow" hard drives with an external Serial ATA (SATA) and NL-SAS interface.
There is an opinion that systems Reserve copy- this is a burden for the IT budget, and for the IT department, so to speak, an extra headache. But ... Manufacturers of data storage systems (SHD) on hard drives of all levels still recommend using backup systems to tape media as part of such solutions, with the help of which a copy of data is created, from which, in case of failure of the storage system, it will be possible to restore data.
Tape media.
The main purpose of tape media is to create backup copies of operational data (backup). On the basis of tape media, you can also organize archival storage of information. Tape solutions provide non-real-time (near-line) access to archived information. The basis of this solution is a robotic tape drive. Today, the volume of data storage on one tape medium in the LTO-5 format is 1.5 TB (3 TB with the possibility of data compression). Therefore, tape storage systems are used to securely store information of large amounts of archived data. These solutions also have a number of serious drawbacks. Tapes are demagnetized, torn, it is necessary to constantly rewind the tape in cartridges, it takes a lot of time to search for a specific file, while the tape in the cartridge is rewound to the right place, the fragility of the media forces you to periodically transfer data from the old tape to a new tape. When organizing off-line storage, cartridges with archival data must be stored in rooms with certain environmental requirements or in specialized cabinets.
optical media.
For organization long-term storage archived data, you must use optical disc drives. Such drives ensure the fulfillment of all requirements for archival storage and archival data storage. high reliability, long terms storage of archival data, contactless work with media, authenticity and immutability of archival data, fast random access to archive data, high capacity of optical media, organization of off-line storage of archival data are important parameters when choosing optical media.
Today, the most popular optical media recording format is the Blu-ray format, which provides a high archiving density of up to 100 GB per optical media. Support for WORM at the hardware level allows you to store recorded on optical media, archived data that cannot be deleted or changed later. And the "open" recording format of the UDF type allows you to read archival information in any device that supports working with such optical media. The main task is to store rarely requested and unchangeable archived data. Practice shows that the amount of such data is about 80% of the total amount of data stored on the operational (on-line) storage. At the same time, 20% of these archived data will never be in demand. By sending such data to archival storage based on optical media, the Customer can free up to 80% of the storage volume on the operational (on-line) storage, which will entail a reduction in the volume and size of the backup window.
Solutions on optical media provide non-real-time (near-line) access to archival information. The volume of archival data storage in the drive on optical media and the number of readers is determined according to the terms of reference. Various types of building archival solutions are supported, up to the "mirroring" of archival data between geographically distributed drives on optical media. Non-contact work with optical media eliminates the possibility of damage to the working surfaces of optical media. Provides backward compatibility with previous types of optical media such as CD\DVD. When organizing archival data storage based on an optical media drive, it is not necessary to create backups this data.
Advantages and disadvantages
Hard disks
- Online access to archival information
- Random access to archived information
- Solution Popularity
- High power consumption
- Expensive solution
- Required to back up archived data
- Minimum "terms" of life (maximum 3 years)
- In the event of a mechanical failure hard drive data is nearly impossible to recover.
- Not intended for organizing off-line storage
Tape media
- Large volumes of archival data storage
- High-speed recording of information on tape media
- Low power consumption
- High total cost of ownership
- Minimum "terms" of life (on average up to 5 years)
- "Closed" format for recording information on tape media
- Low read access time (minimum 5 min)
- Loss of information when exposed electromagnetic radiation
- Possibility of mechanical damage (tape rupture)
Optical media
- Non-volatility of optical media
- Storage period of archival information from 50 years
- Support for the WORM function at the hardware level (immutability of archived data)
- Possibility of organizing off-line storage of archival data
- "Open" recording format (UDF) on optical media
- Low total cost of ownership
- Low power consumption
Conclusion
Most specialists in the field of building archival solutions agree that for archival storage of information with the possibility of online access to it, it is best to use a multi-level structure of archival data storage. The main criterion in choosing a solution should not be cheapness, but the mechanism for saving and protecting archived data, which is implemented in this solution. Before making a final choice, it is necessary to check all the equipment and software for compatibility.
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