Cisco NSS32 Administration Manual page 109

Managing the System
Disk Management
STEP 1
STEP 2
STEP 3
STEP 4
Cisco Small Business NSS300 Series Smart Storage Administration Guide
Volume Type
RAID 6 Disk
Volume
RAID 5, RAID 6
Read-only Mode
To create a volume type:
Choose Disk Management > Volume Management from the Navigation menu.
The Volume Management window opens.
Click on a desired volume type that is supported by your NAS.
Choose parameters for your selected volume type.
Click Create.
Description
RAID 6 disk volume is ideal for important data protection.
To create a RAID 6 disk volume, a minimum of 4 hard disks
are required. The total capacity of RAID 6 disk volume
equals the size of the smallest capacity disk in the array x
(number of hard disks -2). It is recommended that you use
same brand and same capacity hard drive to establish the
most efficient hard drive capacity.
RAID 6 can survive 2 drives failure and system can still
operate properly.
To install a disk when the server is on, make
NOTE
sure the disk volume is in "degraded" mode. Or wait
for two long beeps after the disk crash, and then
insert the new disk.
The drive configuration enters read-only mode in the
following occasions:
• 2 drives are damaged in RAID 5
• 3 drives are damaged in RAID 6
The drives in the above configurations are read-only. It is
recommended to re-create new drive configuration in
such case.
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