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July 9th, 2008 00:00
Change of Windows host name causes disks to go offline
Hello.
We recently switched mail-servers. The hostname of the new server was mailserverhostname-new during the initial setup and SAN configuration. After copying the data from the old server we renamed the windows 2003 host to the original mailserver hostname, after renaming the old mail server to hostname-old.
After this, the dynamic disks configured appears as offline after a reboot, we have to manually activate them. Powerpath sees the disks and everything looks ok from a SAN point of view. We use ECC5.2, the disks are hosted by a DMX1000. I've tried to unmask all disks, delete the host from ECC and reinstall the master agent but this seems like a windows problem. I can see in the registry that the following key has the value of the old hostname: "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\dmio\Boot Info\Primary Disk Group\Name", could changing this value be a solution ?
We recently switched mail-servers. The hostname of the new server was mailserverhostname-new during the initial setup and SAN configuration. After copying the data from the old server we renamed the windows 2003 host to the original mailserver hostname, after renaming the old mail server to hostname-old.
After this, the dynamic disks configured appears as offline after a reboot, we have to manually activate them. Powerpath sees the disks and everything looks ok from a SAN point of view. We use ECC5.2, the disks are hosted by a DMX1000. I've tried to unmask all disks, delete the host from ECC and reinstall the master agent but this seems like a windows problem. I can see in the registry that the following key has the value of the old hostname: "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\dmio\Boot Info\Primary Disk Group\Name", could changing this value be a solution ?
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bodnarg
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385 Posts
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July 9th, 2008 05:00
There is likely an issue you will have with the host agent (see KB article emc92671) which might require some work to fix your agents.
For regular zoning and LUN masking a host name change would have no impact. Assuming you kept the same HBA cards (i.e. WWNs) which is how your zoning/masking identify the host. Also the fact that you can see the storage but it is being taken offline show that this is really an OS issue.
I did a quick scan of the Microsoft site and found this article which may help you out: http://support.microsoft.com/kb/222189
I believe you need to reimport your Dynamic disk group and then you should be fine.
Strong word of advice - AVOID DYNAMIC DISK like the plague if possible. The very small benefits you get from them are not worth the headaches they induce. Dynamic disks are basically all of the headaches of a volume manager with very few of the benefits.