Efect on mounted file system after doing changes in SAN zoning

[sum vedak]

Curretnly we are using default zoining in SAN switch Cisco MDS 9509, after adding secured zoning what will be the impact on mounted file system? File systems are created using Storage luns. Can we do this activity online in HP UX 11.23 v2?

[Duncan Edmonstone]

I know nothing about secured zoning on cisco switches.

What I do know is that as longs as:

-the operations do not result in storage devices in the SAN getting new FCIDs

- new domain IDs are not assigned to the switches in the SAN

- HBAs and storage devices remain in the same zones

You should be OK.

If you're really unsure and can't get a staight answer then take some precautions anyway:

1. unmount the filesystems which are on SAN LUNs
2. Create VG map files using "vgexport -p -s -m vgNN.map /dev/vgNN"
3. Deactivate the VGs using "vgchange -a n /dev/vgNN"
4. Do your work on the SAN
5. Check whether disk devices have changed using ioscan/insf
6 If they have changed then vgexport/vgimport the VGs


HTH

Duncan

[sum vedak]

Withount unmounting file system can we able to conduct this activity?

[Duncan Edmonstone]

if this were a normal zoning change I would say "no problem with filesystems remaining mounted" - but I have no idea what the impact would be of moving to secure zoning and whether it means access to the storage ports will be temporarily removed. You'll really have to check this with Cisco

HTH

Duncan

[sum vedak]

currently we are using default zoning means there is no VSAN currently configured, after zoning VSNA will be configured. Will this activity can carried out online? Will the device address will change?

[Duncan Edmonstone]

aah VSANs - you didn't mention VSANs before - as creating VSANs and moving ports into them almost inevitably means assignbing new domain IDs and FCIDs I would say NO, you can't do it online.

HTH

Duncan