Adding new Disk attached from SAN with out reboot.?
 

In the sum of all things, downtime is not yummy. I am searching for a way to detect SAN attached disk. I have tried going and running kudzu on the box with no luck as well as going into LVM and running lvmscandisk. I am using Redhat 40 update 1. I am attached to a EMC san .


Any advice or tips would be great!


I am aware of unloading / loading the fiber driver as well, only problem with that is if I have a DB up attached to the SAN , loadling and unloading that driver would be bad.

Thanks for everyones time upfront !!
dcj

if you type dmesg, does it recognise the new LUN's once it is zoned?

if so, you should be able to just fdisk them at that point.

I am getting some lun's tomorow myself, and will try it.

just found this....not sure if/how it works yet.

http://llg.cubic.org/tools/

scsiadd and scsiaddgui

If it's just a new disk for an existing scsi device, scsiadd or the like will probably work without you having to reboot. If it's a whole new scsi device, you most likely will probably need to reboot so the computer recognizes it.

This works well for me.
http://bash.cyberciti.biz/diskadmin/...si-bus.sh.html

If you walk down the /sys/bus/scsi/decices/*:*:*:*/
you can force a rescan if the driver supports

echo 1>rescan

-Matt