White Papers
Table Of Contents
- 1 Introduction to member RAID policies
- 2 RAID policy availability and performance comparisons
- 3 Setting the member RAID policy
- 4 Displaying the RAID level space distribution
- 5 PS Series array disk layout
- 6 Converting or migrating from a member RAID policy
- 7 Summary
- A 12-Disk PS Series array RAID configurations
- B 14-Disk PS Series array RAID configurations
- C 16-Disk PS Series array RAID configurations
- D 48-Disk PS Series array RAID configurations
- E 42 or 84-disk PS Series RAID configurations
- F Technical support and resources
22 Dell PS Series Storage: Choosing a Member RAID Policy | TR1020 | v 4.7
Selecting RAID policy
6.3 Array evacuation
If the current RAID policy does not support an online conversion and the group has other members with
sufficient free space, a member can be converted to any other RAID policy by removing the member from the
group (which resets the array) and adding it back to the group, then selecting a different RAID policy.
The following RAID policies must use an offline migration method:
RAID 5 to RAID 6 or RAID 10
RAID 6 to RAID 10
RAID 50 to RAID 10
6.4 Online volume migration
Another option is migrating volumes to another RAID type. There are three ways to move individual volumes
to specific RAID types.
Move volume
RAID preference designation
PS Series replication
6.4.1 Move volume
The Move volume method requires an array that is already configured with the RAID policy and enough free
space to host the volume data.