Hi Folks,

 

I've got a server running RH5.2 will several volume groups mounted via
iSCSI from an MD3000i.

Unfortunately these volume groups were not created with multipathing in
mind, so pv's were created using the /dev/sdx devices.

 

I want to enable multipathing on this server but I'm not sure if I can
do it with the current setup of if I need to recreate the pv's.

 

Using multipathing before the VGs are created I would pvcreate
/dev/mapper/mpathn where mpathn points to the disk devices ie

/dev/mapper/mpath1 -> sdb  sdc  sdd  sde

/dev/mapper/mpath2 -> sdf  sdg  sdh  sdi

etc

 

So if if LVM is currently using /dev/sdx for pv's is it OK to setup
multipathing without recreating the pv's from /dev/mapper/mpathn (and
losing data) ?

 

If anyone has any thoughts on this I'd appreciate there input.

 

Kind Regards

Nick Lunt

Managed Services and O/S Analyst

Patech Solutions Limited

Tel: 01543 444 707

Fax: 01543 444 709

Tame House, Fradley Park, Lichfield, Staffordshire, WS13 8RZ

www.patech-solutions.com <http://www.patech-solutions.com/home.htm> 

 

 

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