Dell PowerVault MD3000 - Manual (Page 107)

Hardware Considerations
107
Enclosure Hardware Replacement,
Maintenance, and Configuration
Considerations
Removing and Inserting Enclosure Management
Modules on Attached Expansion Enclosures
The following procedures describe how to safely remove and insert an
enclosure management module (EMM) from an expansion enclosure
attached to the MD3000/MD3000i.
NOTICE:
Failure to follow these guidelines may result in a physical disk failing
during removal and/or inadvertent removal of its redundant data path.
Removing an EMM from the Expansion Enclosure
1 Check the Recovery Guru to confirm that there is no loss of physical disk
path redundancy.
• If there is no loss of redundancy, check the channel. If it matches the
EMM you are removing, you can safely remove it now.
• If redundancy is lost, run the following command. Note that
channel [1] is the degraded channel.
“set physicalDiskChannel channel [1]
status = optimal;”
2 Verify that the path to the channel is restored. The Recovery Guru may
take several minutes to update.
Inserting an EMM into an Expansion Enclosure
1 Make sure to always insert the EMM without SAS cables attached.
After the EMM is inserted, wait at least 30 seconds before attaching the
SAS cables.