Maintenance Manual

Managing the System
Disk Management
Cisco Small Business NSS300 Series Smart Storage Administration Guide 118
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Migrate This action enables a drive configuration to be migrated to
a different RAID configuration. Migrate is supported for the
following drive configurations:
• Migrate single drive to RAID 1, 5, or 6
• Migrate RAID 1 to RAID 5 or 6
• Migrate RAID 5 to RAID 6
• Migrate single disk mode or RAID 1 to RAID 10.
Configure spare
drive
This action allows you to add or remove a RAID 5 spare
drive.
Bitmap Bitmap improves the time for rebuilding after a crash, or
removing/re-adding a device. It does not improve normal
read/write performance, and might even cause a small
degradation in performance. However, if an array has a
bitmap a device can be removed and re-added and only
blocks changes need to be made since the removal (as
recorded in the bitmap) can be resynced. Bitmap support
is only available for RAID 1, 5, and 6.
Recover This action can recover a failed RAID disk volume from
“Inactive” status to the normal state (RAID 1, 5, and 6 will
be recovered to the degrade mode, RAID 0 and JBOD will
be recovered to the normal state). Before recovering the
failed disk volume, confirm that all hard disks of the disk
volume are properly seated in the NAS drive bay. Once
recovery is completed, back up your disk data
immediately in case the disk volume fails again. Not all
inactive RAID disk volumes can be recovered.
Global Spare This function allows you to set or cancel a global spare
drive. A global spare drive can be used to replace a failed
hard drive in any RAID 1, 5, 6,10 volume. If you have
multiple RAID volumes which share the same global spare
drive, the spare drive will replace the first failed drive in a
RAID volume.
NOTE: The capacity of the global spare drive must be
equal to or larger than that of a member drive of a RAID
disk volume.
Action Description