The Number Of Hot Spare Disk Drive - NEC M310 Configuration Manual

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5. Functions <Hot Spare Disk (3)>

(3) The Number of Hot Spare Disk Drive

• There is no upper limit for the number of hot spare disks.
• Bind hot spare disks when NL-SAS disk drives are in the system.
• Refer to the table below for the recommended numbers of hot spare disks for each type of disk
drive.
Recommended number of hot spare disk drives
Disk drive type
SAS Disk Drive
NL-SAS Disk Drive
SAS SSD
*1
Must assign hot spare disks when NL-SAS disk drives are in the system.
One type of capacity/rotation speed
n types of capacity/rotation speed
One type of capacity/rotation speed
*1
n types of capacity/rotation speed
Hot spare is optional. Because SAS SSD does not have mechanical parts
such as motors, heads and media, it is reliable. Therefore, hot spare is not
necessary.
Condition
NEC Confidential
Recommendation
One hot spare drive / 24 disk drives
n spare disk drives / 24 disk drives
One hot spare drive / 12 disk drives
n spare disk drives / 12 disk drives
61

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