Dell PowerVault MD1220 - Manual (Page 25)

Operating Your Storage Enclosure
25
Changing Your Enclosure’s Operating Mode
If you decide to change the operating mode of your enclosure after initial
configuration, you must:
1 Back up all data contained in the enclosure and store the data in a
secure location.
2 When changing the operating mode from:
• Unified mode to split mode—If existing virtual disks span physical
disks that are split by changing from unified to split mode, remove the
virtual disk configuration.
• Split mode to unified mode—Some virtual disks may appear as foreign
if the configuration is not deleted before turning the enclosure back on.
These disks must be imported or cleared using either Server
Administrator or the BIOS configuration utility before they can be used.
NOTE:
Split-mode configurations do not support daisy-chaining of enclosures
and redundant paths.
3 Turn off the host system.
4 Turn off the enclosure by turning off both power supply/cooling fan modules.
5 Change the position of the enclosure mode switch.
6 Rearrange the disks in the enclosure as necessary.
7 Turn on the enclosure by turning on both power supply/cooling fan modules.
8 Turn on the host system.
9 If required, recreate virtual disks in the enclosure.
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