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Old 10-13-2011, 04:46 PM   #1
amaskedman
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Registered: Jan 2001
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Removing SAN and HBA


I dont use linux often, but I have an RedHat backup appliance. I recently powered off and removed a SAN and San Switch. I want to remove the HBA from the box as well.

Should I have removed disk from redhat prior to taking down the storage? I am having a hard time determining which disk is which. I still have two DAS units attached via a SAS controller.

How do I uninstall the HBA drivers and instances?

Thank you
 
Old 10-15-2011, 12:59 AM   #2
anomie
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Registered: Nov 2004
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Quote:
Originally Posted by amaskedman
Should I have removed disk from redhat prior to taking down the storage?
No. You don't typically "remove" disks from the OS. But you should have removed (and may still need to remove) any /etc/fstab entry that is mounting a LUN.

Quote:
Originally Posted by amaskedman
I am having a hard time determining which disk is which. I still have two DAS units attached via a SAS controller.
There are a number of ways to figure this out, but the easiest (IMO, and if you have it installed) is letting DM-Multipath tell you which is which:

Code:
# multipath -ll
(If that's a no go, there is some research required with systool(1) and proc filesystem scsi attributes.)

Quote:
Originally Posted by amaskedman
How do I uninstall the HBA drivers and instances?
You don't. Removing the physical HBA will probably result in the driver (module) no longer being loaded. If it is still loaded for some reason, its memory footprint should be completely negligible.
 
  


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