Hi Frank
Ø I have no experience with iSCSI. My experience with multipathing is with fibre attached disk arrays. What I have successfully done with those (on RHEL4) was to unmount and export the vg, then implement multipath, then import the vg and everything just worked. Thats good to know, thankyou. I will certainly give this a go before recreating PV's / VG's. Thanks for your help. 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> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Francis Swasey Sent: 13 October 2008 12:22 To: Red Hat Enterprise Linux 5 (Tikanga) discussion mailing-list Subject: Re: [rhelv5-list] Multipath on already created PVs/VGs Hi Nick, I have no experience with iSCSI. My experience with multipathing is with fibre attached disk arrays. What I have successfully done with those (on RHEL4) was to unmount and export the vg, then implement multipath, then import the vg and everything just worked. Frank On 10/13/08 5:39 AM, Nick Lunt wrote: 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> ________________________________ _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list -- Frank Swasey | http://www.uvm.edu/~fcs Sr Systems Administrator | Always remember: You are UNIQUE, University of Vermont | just like everyone else. "I am not young enough to know everything." - Oscar Wilde (1854-1900)
_______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list
