On Mon, Jul 21, 2008 at 06:46:47PM +0200, Domenico Viggiani wrote: > It seems that online resizing of a multipath device is actually impossible: > http://www.redhat.com/archives/dm-devel/2007-August/msg00205.html >
Hmm.. is this still the case nowadays? :( Anyone working on getting this fixed? -- Pasi > This is my personal offline how-to: > # Rescan devices (for all 4 paths) > echo "1" > /sys/bus/scsi/drivers/sd/<h>\:<b>\:<t>\:<l>/block/device/rescan > ... > # Check /var/log/messages > # Trespass LUN by Navisphere > # Rescan devices (for all 4 paths) > echo "1" > /sys/bus/scsi/drivers/sd/<h>\:<b>\:<t>\:<l>/block/device/rescan > ... > # Check /var/log/messages > # Umount filesystem > # Deactivate VG > vgchange -an vg_LUN > # Delete and recreate multipath device > multipath -F > multipath -v2 > multipath -ll > # Activate VG > vgchange -ay vg_LUN > # Remount filesystem > # Extend PV > pvresize /dev/mapper/<long-multipath-identifier> > # Check VG > vgdisplay -v vg_LUN > # Extend LV > lvextend -l +256 /dev/vg_LUN/lvol... > # Extend FS > ext2online /dev/vg_LUN/lvol... > > Alternatively, you can create an additional LUN and add it to the VG > (online) > > If someone is able to find a better method, please post it! > > -- > Domenico Viggiani > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Collins, > > Kevin [Beeline] > > Sent: Monday, July 21, 2008 6:31 PM > > To: Red Hat Enterprise Linux 5 (Tikanga) discussion mailing-list > > Subject: RE: [rhelv5-list] RE: multipathing in RHEL5 > > > > What about if the LUN is an LVM physical volume (PV) already? > > Can you use pvresize? > > > > Thanks, > > > > Kevin > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Domenico Viggiani > > Sent: Monday, July 21, 2008 1:28 AM > > To: 'Red Hat Enterprise Linux 5 (Tikanga) discussion mailing-list' > > Subject: [rhelv5-list] RE: multipathing in RHEL5 > > > > We are currently using native Red Hat multipath with an EMC > > Clariion CX700 disk-array. No problem at all, you need only > > to be well-disciplined and methodical with > > creating/destroying LUNs. Only real BIG problem is that you > > cannot resize a LUN online (unless you add PV to an existing > > VG, using LVM). > > > > Bye > > -- > > Domenico Viggiani > > _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list
