hot spare

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hot spare

An extra disk drive in a RAID configuration that is ready and waiting to be put into action automatically when another drive fails. Using the RAID algorithms, the missing data from the faulty drive is reconstructed and written to the hot spare. When the bad drive is replaced, it then becomes the hot spare. If a hot spare is not used, then the faulty drive must be manually removed and replaced with a new one. See RAID and hot swap.
References in periodicals archive ?
If the configuration includes a hot spare disk drive, this activity can take place without the user even noticing.
To meet the needs of enterprise customer requirements, the DX100 has high availability features and RAID 5 with hot spare disk options and presents up to 64 TB of storage and up to 2 TB/hr performance.
Kaleidescape also released the 3U Server that features the most capacity ever offered by a Kaleidescape Server, a Hot Spare Disk Cartridge for unattended recovery from hard drive failure, and the new Speed Reader for rapid unattended bulk importing of DVDs and CDs.
The Vivant family supports multiple simultaneous RAID levels (0,1,0+1,5), multiple hot spare disk drives and concurrent rebuilds, and fully redundant components including mirrored cache.
Like other Vivant family members, the V25 supports multiple simultaneous RAID levels (0,1,0+1,5), multiple hot spare disk drives and concurrent rebuilds, and fully redundant components including mirrored cache.
To support business continuance strategies, the Dell EMC CX400 offers redundant hardware and software features including hot spare disk drives, multi-path failover, data snapshots and cloning, and local or remote data mirroring.
The system is also capable of supporting an optional PCI ultra/wide SCSI-2 RAID controller which supports hot swap and hot spare disk drive capabilities.
NetFORCE offers the very latest in NAS technology with very fast and highly reliable storage management software and full fault-tolerant hardware design -- including RAID-5 plus hot spare disk architecture -- required for high-volume, transaction intensive Web environments such as Stock100.
5TB of storage in a single data center; --The industry's fastest 10,000 RPM disk drives speed up disk access time; --Redundant load-sharing power supplies ensure a source of continuous power; --Automatic rebuild to hot spare disk drives enable GigaRAID/SXL to repair itself; --RAID levels 0, 1, 0/1, 3 and 5 to suit the specific needs of a variety of applications; --User Upgradable to GigaRAID/SX with a simple board swap.
In addition, it applies to reading and writing data after any disk has failed, after any disk channel has failed, or after any failed disk has been replaced by a global hot spare disk.
When a hard disk error occurs on one of the RAID drives, this on-line hot spare disk automatically replaces the failed disk drive.