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 a hard drive fails and the Hot Spare comes into action there is a rebuild time.
SuperTrak SX6000 permits use of an unassigned, attached hot spare drive for immediate rebuilding of data in case of drive failure.
The hot spare NMX server makes it virtually impossible for operators to ever lose control of their service infrastructure, reducing the risk of unplanned downtime.
Restores are highly reliable, due to the data replication and hot spare support integrated into the IP SAN.
The unit supports RAID 5 with hot spare capability and ships with redundant power supplies as standard features.
Adding a global hot spare provides the ability to perform a background rebuild of lost data.