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31 Dell PS Series Storage: Choosing a Member RAID Policy | TR1020 | v 4.7
D 48-Disk PS Series array RAID configurations
RAID set relationships for a 48 disk PS Series 65xx array
RAID Policy
Spare Disks
RAID Set Relationship
Best Practice
RAID 6
1 Spare Disk
(12+2) (12+2) (12+2) (3+2)
Yes
RAID 6
Accelerated
1 Spare
HDD
2
(12+2 HDD) (12+2 HDD) (10+2
HDD) (5+2 SSD)
N/A
1
RAID 10
2 Spare
Disks
(7+7) (7+7) (7+7) (2+2)
No for HDD or SSD
greater than 6 TB.
RAID 50
2 Spare
Disks
(6+1, 6+1) (6+1, 6+1) (6+1,
6+1) (3+1)
For selected
configurations
2
RAID 5
2 Spare Disk
(12+1) (12+1) (12+1) (6+1)
Not for business
critical data
1
RAID 6 Accelerated is the only available option for hybrid (mix of HDD and SSD) arrays.
2
Firmware v8.0 and higher provides an optional PS Series CLI enabled feature which will allow for
replacement of the failed SSD drive prior to automatically rebuilding the RAID. For more information see
“RAID Rebuild Delay” in the PS Series Firmware release notes at https://eqlsupport.dell.com then “Downloads
-> PS Firmware”.
3
RAID 50 is not recommended for arrays with 1 TB or larger disks. The Dell Group Management GUI will not
allow for any members with 3 TB or higher to be configured with RAID 50 (firmware 7.0.0 and higher)