How to confirm hard drive ufsid before upgrade?

krad kraduk at
Mon Jan 4 09:41:24 UTC 2010

2010/1/4 Tigger <tigger at>

> Hello. I recently upgraded 7 remote servers from FreeBSD 7.2 to 8.0.
> During the process, 3 servers had hard drive ufsid issues. Basically
> during the reboot between 7.2 to 8.0, the drive ids 'changed'.
> I'm using ufsids in fstab.
> All servers have two SCSI drives, but have all been set-up by different
> people that have come from a Linux background. I can only assume they
> have used different commands and methods to format the drives.
> I'm assuming this issue is related to GEOM_ changes, however it is not
> very clear how to prevent this from happening (I'm sure I'm missing
> something).
> I have one more machine to go which is a lot more critical than the
> others and do not wish to have this one down for as long as the others
> where. It took about 6 hours to get the tech guys at the other end to
> get 2 of the boxes back up, the other one was easy to get up, but all
> data was 'lost' on one drive and had to be restored from a back-up.
> -Tig
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One reason why i use the human readable glabels

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