[linux-lvm] LVM over iSCSI

Ray Morris support at bettercgi.com
Wed Jan 5 20:53:33 UTC 2011

What says lvscan -vv ?
Ray Morris
support at bettercgi.com

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On 01/05/2011 11:48:54 AM, Roberto Sassu wrote:
> Hi all
> i configured a LVM volume group using two iSCSI devices as
> physical volumes.
> I designed one node (A) to create snapshots of a Logical Volume,
> called 'lv_origin' and i want other nodes (B, C) access them
> exclusively.
> I assume that 'lv_origin' is never modified after the first snapshot
> is created.
> So, A first creates 'lv_origin' and then a snapshot called
> 'lv_snap1', which is available for this node.
> The node B executes the command 'vgscan' and 'vgchange -ay'.
> In this way, 'lv_origin' and 'lv_snap1' become available for B.
> Next step, A creates a new snapshot of 'lv_origin' called
> 'lv_snap2'. This is not available for B and the only way that i
> found to use it is to perform (on the node B) the following
> commands:
> 1) vgscan
> 2) vgchange -an
> 3) vgchange -ay
> However this procedure is not applicable if one of created
> LVs is in use. How to solve this issue?
> Thanks in advance for replies
> Roberto Sassu
> _______________________________________________
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> linux-lvm at redhat.com
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> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

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