Users Guide

Table Of Contents
Raid Level Migration
RAID Level Migration (RLM) refers to changing a virtual disk´s RAID level. iDRAC9 provides an option to increase the VD size
using RLM. In a way, RLM allows migrating the RAID level of a virtual disk which in turn may increase the size of virtual disk.
RAID level migration is the process of converting a VD with one RAID Level to another. When you migrate a VD to a different
Raid Level, the user data on it is redistributed to the format of the new configuration.
This configuration is supported by both staged and realtime.
The below table describes possible reconfigurable VD layouts while reconfiguring (RLM) a VD with addition of disks and without
addition of disks.
Table 46. Possible VD Layout
Source VD Layout Possible target VD Layout with Disk
Add
Possible target VD Layout Without
disk addition
R0 (single disk) R1 NA
R0 R5/R6 NA
R1 R0/R5/R6 R0
R5 R0/R6 R0
R6 R0/R5 R0/R5
Permitted operations when OCE or RLM is going on
The following operations are allowed when OCE/RLM is going on:
Table 47. Permitted operations
From Controller End behind
which a VD is going through
OCE/RLM
From VD End (which is
going through OCE/RLM)
From any other Ready State
Physical Disk on the same
controller
From any other VD
(which is not going
through OCE/RLM) End
on the same controller
Reset Configuration Delete Blink Delete
Export Log Blink Unblink Blink
Set Patrol Read Mode Unblink Assign Global Hot Spare Unblink
Start Patrol Read Convert to non-RAID Disks Rename
Change Controller Properties Change Policy
Manage Physical Disk Power Slow Initialize
Convert to RAID Capable Disks Fast Initialize
Convert to Non-RAID Disks Replace Member Disk
Change Controller Mode
OCE and RLM Restrictions or Limitations
Following are the common limitations for OCE and RLM:
OCE/RLM is restricted to the scenario where the disk group contains only one VD.
OCE is not supported on RAID50 and RAID60. RLM is not supported on RAID10,RAID50 and RAID60.
Managing storage devices
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