Partners SurfRAID TRITON Mini, User Manual

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Introduction
1-16
1.4.4.2 Hot-Swap Disk Drive Support
The SurfRAID TRITON Mini has a protection circuit to support the replace-
ment of hard disk drives without having to shut down or reboot the system.
The removable hard drive tray allows a “hot swappable,” fault-tolerant RAID
solution at price much less than that of conventional SCSI hard disk RAID
systems.
1.4.4.3 Hot-Swap Disk Rebuild
A Hot-Swap function can be used to rebuild disk drives in arrays with data
redundancy such as RAID level 1(0+1), 3 and 5. If a hot spare is not avail-
able, the failed disk drive must be replaced with a new disk drive so that the
data on the failed drive can be rebuilt. If a hot spare is available, the rebuild
starts automatically when a drive fails. The SurfRAID TRITON Mini automati-
cally and transparently rebuilds failed drives in the background with user-de-
finable rebuild rates. The SurfRAID TRITON Mini will automatically restart the
system and rebuild if the system is shut down or powered off abnormally
during a reconstruction procedure condition.
When a disk is “Hot-Swapped”,
although the system remains operational, it will no longer be fault tolerant.
Fault tolerance will be lost until the removed drive is replaced and the rebuild
operation is complete.