steps to clone a volume group
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I've had that problem too. Two workarounds. Here's what I usually do:
1a) Map the snapshot LUN to a *different* host than the production machine. 1b) Change the UUID and VG/LV there.
1c) *Then* map the LUN to the production machine.
Alternatively (untested):
2a) service haldaemon stop; service multipathd stop; service lvm2-monitor stop (not sure which of these is really necessary) 2b) Map the snapshot to the production server in the SAN.
2c) Manually add with echo '- - -' > /sys/class/scsi_host/hostN/scan
2d) Change UUID and VG/LV.
2e) Manually remove with echo 1 > /sys/block/sdX/device/delete
2f) service haldaemon start; service multipathd start; service lvm2-monitor start
Signature · 3 lines
Rich Graves http://claimid.com/rcgraves Carleton.edu Sr UNIX and Security Admin CMC135: 507-222-7079 Cell: 952-292-6529
Option 1 we are doing now but trying to avoid due to software license fees, etc.
not a vet yet with linux syntax --
trying item 2c and subbing host0 for hostN -- getting --
bash: echo: write error: invalid argument
i'm sure its something very obvious, but not too me...
Mike
________________________________
From: Rich Graves <[email protected]>
To: [email protected]
Sent: Monday, November 17, 2008 3:27:43 PM
Subject: Re: [linux-lvm] steps to clone a volume group
I've had that problem too. Two workarounds. Here's what I usually do:
1a) Map the snapshot LUN to a *different* host than the production machine. 1b) Change the UUID and VG/LV there.
1c) *Then* map the LUN to the production machine.
Alternatively (untested):
2a) service haldaemon stop; service multipathd stop; service lvm2-monitor stop (not sure which of these is really necessary) 2b) Map the snapshot to the production server in the SAN.
2c) Manually add with echo '- - -' > /sys/class/scsi_host/hostN/scan
2d) Change UUID and VG/LV.
2e) Manually remove with echo 1 > /sys/block/sdX/device/delete
2f) service haldaemon start; service multipathd start; service lvm2-monitor start
Signature · 9 lines
Rich Graves http://claimid.com/rcgraves Carleton.edu Sr UNIX and Security Admin CMC135: 507-222-7079 Cell: 952-292-6529 _______________________________________________ linux-lvm mailing list [email protected] https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/