easyRAID S4-FWTT, User Manual

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User’s Manual
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Removing / replacing a drive
What if a disk fails?
If a disk drive fails, the disk status indicator of the disk carrier will light red and the alarm
will sound. When this happens, you should replace the failed disk.
The failure or removal of a single drive in a RAID5 array will not lead to
failure of the array. The failure or removal of a single drive in a RAID0 array
will lead to loss of all data on the array and the entire array must be
re-initialized.
There is no need to immediately replace a failed disk in a RAID 5+spare
array. The hot spare disk will be brought on line automatically.
The alarm can be silenced by pressing the Enter / Mute button to the right of
the display.
Swapping drives
The hot swap function for RAID 5 arrays enables failed disks to be swapped while the
array is powered on. RAID rebuilding will be processed automatically in the background
and the RAID subsystem will record its progress. If the host system is shut down or
powered off abnormally, the RAID subsystem will continue the disk rebuilding process
after power is turned on again.
A hard disk in a RAID 5 array should not be replaced when the system is
turned off. Doing so may leads to loss of data. Always hot swap disks in a
RAID5 array.