Release Notes

PS Series capacity
32 Dell PS Series Configuration Guide
7.5 Array RAID configurations and associated RAID sets
The tables show a logical drive layout when an array is initialized for the first time. The actual physical layout
of drives can change and evolve due to maintenance and administrative actions. Spare drives can move as
they are utilized to replace failed drives and newly added drives become the spares. It is not possible to
determine which physical drives are associated with each RAID set. This information is dynamic and
maintained by the PS Series firmware.
PS Series array RAID set relationship for each RAID type in a 24-drive configuration
RAID policy
Spare disks
RAID set relationship
Best practice
RAID 6
1 spare disk
(10+2) (9+2)
Yes
RAID 10
2 spare disks
(6+6) (5+5)
Yes
RAID 50
2 spare disks
(5+1, 5+1) (4+1, 4+1)
For selected configurations
RAID 5
1 spare disk
(12+1) (9+1)
Not for business-critical data
PS Series array RAID set relationship for each RAID type in a 48-drive configuration
RAID policy
Spare disks
RAID set relationship
Best practice
RAID 6
1 spare disk
(12+2, 12+2, 12+2) (3+2)
Yes
RAID 10
2 spare disks
(7+7, 7+7, 7+7) (2+2)
Yes
RAID 50
2 spare disks
(6+1, 6+1, 6+1, 6+1, 6+1, 6+1) (3+1)
For selected configurations
RAID 5
2 spare disks
(12+1, 12+1, 12+1) (6+1)
Not for business-critical data
PS Series array RAID set relationship for each RAID type in a 16-drive configuration
RAID policy
Spare disks
RAID set relationship
Best practice
RAID 6
1 spare disk
(13+2)
Yes
RAID 10
2 spare disks
(7+7)
Yes
RAID 50
2 spare disks
(6+1, 6+1)
For selected configurations
RAID 5
1 spare disk
(14+1)
Not for business-critical data