Comments on: How to resize your SR in Xen

By: bofh42

bofh42 — Tue, 30 Jun 2009 15:44:19 +0000

copy & past template for the job, jut set your SR name

# resize the lun on the iscsi server

# replace in the next line
SR2GROW=`xe sr-list params=uuid name-label= | awk ‘{ print $NF }’`

# find devices to resize
DEV2GROW=`pvscan | grep $SR2GROW | awk ‘{ print $2 }’`

# scan for resized devices
iscsiadm -m node -R

# do the resize
for dev in $DEV2GROW ; do
pvresize $dev
done

# tell xenapi to look for the new LVM size
xe sr-scan uuid=${SR2GROW}

By: Bart

Bart — Thu, 25 Jun 2009 11:39:06 +0000

For resizing without reboot, first run the command:
iscsiadm -m node -R

This will rescan the iSCSI devices and detect the new sizes.

After this, you continue with pvresize & sr-scan.

By: JTY

JTY — Sat, 26 Apr 2008 03:37:26 +0000

I had to reboot my Xen server before running pvresize. Otherwise, it didn’t recognize the increased disk space. Likely because Open-iSCSI needs to reconnect to see the larger LUN.

By: Carlos Taborda

Carlos Taborda — Fri, 11 Apr 2008 21:52:09 +0000

for some reason, it didnt do anything for me (ctaborda at lansyx.com) Let me know if you could give me some help.

I had a 250gb LUN, and expanded it to 750GB, I am now trying to expand my SR as well.

I did the following :

# xe sr-list name-label=XenContainer
uuid ( RO) : c12f813c-8e4c-b04f-4872-0930c8b84f51
name-label ( RW): XenContainer
name-description ( RW):
type ( RO): lvm
content-type ( RO): user

# pvscan | grep c12f813c-8e4c-b04f-4872-0930c8b84f51
PV /dev/dm-3 VG VG_XenStorage-c12f813c-8e4c-b04f-4872-0930c8b84f51 lvm2 [249.99 GB / 79.99 GB free]

# pvresize /dev/dm-3
Physical volume “/dev/dm-3″ changed
1 physical volume(s) resized / 0 physical volume(s) not resized

# xe sr-scan uuid=c12f813c-8e4c-b04f-4872-0930c8b84f51
#

After this, I check within XenCenter and I still see my SR as 250g! I would love some help. Also, am I safe from loosing data by doingthis?

Thanks,

By: Ben Norman

Ben Norman — Fri, 11 Jan 2008 06:21:10 +0000

Hi Roel, Thanks for the help. I used the same commands for a shared Fibre Channel San Storage. Worked a treat. Just a quick note for anyone using the xe sr-scan command to make sure you add the uuid at the end as below.

xe sr-scan uuid=

Cheers
Ben