Dell POWERVAULT MD3620I - Manual (Page 141)

Configuration: Disk Groups and Virtual Disks 141
Changing the RAID Level of a Disk Group
Changing the RAID level of a disk group changes the RAID levels of every
virtual disk that comprises the disk group. Performance may be slightly
affected during the operation.
Guidelines to change the RAID level of a disk group:
• You cannot cancel this operation after it begins.
• The disk group must be in Optimal status before you can perform this
operation.
• Your data remains available during this operation.
• If you do not have enough capacity in the disk group to convert to the new
RAID level, an error message is displayed, and the operation does not
continue. If you have unassigned physical disks, use the Disk Group
Add Free Capacity (Physical Disks) option to add additional capacity to
the disk group. Then retry the operation.
To change the RAID level of a disk group:
1 In the AMW, select the Logical tab and select a disk group.
2 Select Disk Group Change RAID Level.
3 Select the appropriate RAID level and click Yes to confirm the selection.
The RAID level operation begins.
Removing a Host-to-Virtual Disk Mapping Using Linux DMMP
To remove a host-to-virtual disk mapping using Linux DMMP, follow these
steps:
1 Unmount the filesystem containing the virtual disk:
# umount filesystemDirectory
2 Run the following command to display multi-pathing topology:
# multipath -ll
Note the virtual disk that you want to delete from the mapping. For
example, the following information may be displayed:
mpath6 (3600a0b80000fb6e50000000e487b02f5) dm-10
DELL, MD32xx
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