adding a disk to an Autoraid unit

[A. Clay Stephenson]

You are correect, I somehow counted 12 disks instead of 11. You will get almost the full 18GB's and an additional 18GB's if you turn off Active Hot Spare BEFORE creating (BIND'ing) the new LUN.

[Scott Dunkley]

Thanks all, very informative.

[Scott Dunkley]

Sorry to bring this to the top but i am in the middle of attempting this.

I have allocated the new disk space to a new LUN. I now want to extend a VG but the VG is a shared clustered VG (distributed). I have tried undistributing the VG but it says it needs to be deactivated first which means down time.

is there anyway to do this on the fly?

[Karthik S S]

Scott,

What do you mean by

"I have tried undistributing the VG but it says it needs to be deactivated first which means down time."

??

You can extend a VG when it is online using vgextend command

ex:
pvcreate /dev/rdsk/cxtxdx (path of the new lun)
vgextend vgname /dev/rdsk/cxtxdx

However if you need to extend a LV or filesystem you need to have OnlineJFS in order to do it on the fly ..

-Karthik S S

[Scott Dunkley]

Yeah I sorted it after I had posted. I was trying to extend the VG using SAM and thats when it came back with the message about not being able to extend the VG as it is distributed. So I tried to undistribute it using SAM and got the message about deactivation.

So.... I tried it on the command line and it worked fine.

Thanks for your help.

[Scott Dunkley]

got another issue with this now.

I have created a new VG with the new LUN. Then created a couple of file systems which I am exporting to the 2nd node in a cluster.

VGexport worked fine, but the vgimport is failing on the second node. When I do an IOSCAN the PV's dont have a /dev/dsk device file only the /dev/rdsk file. I guess this is why the vgimport if failing with the message: PV is not a block special file
couldnt access list of PV's for...

How do I get the newly created PV's (LUN) to show up correctly on the second node?

[Karthik S S]

got another issue with this now.

I have created a new VG with the new LUN. Then created a couple of file systems which I am exporting to the 2nd node in a cluster.

VGexport worked fine, but the vgimport is failing on the second node. When I do an IOSCAN the PV's dont have a /dev/dsk device file only the /dev/rdsk file. I guess this is why the vgimport if failing with the message: PV is not a block special file
couldnt access list of PV's for...

How do I get the newly created PV's (LUN) to show up correctly on the second node?

Scott,

On the second node do a,

ioscan -fnC disk
insf -e -C disk

Now you should be able to see the new device files.

on second node,
mkdir /dev/vg_name
cd /dev/vg_name
mknod group c 64 0x0n0000
(n should be unique and should match node1's group file)
vgimport -v -m mapfile vg_name /dev/dsk/cxtxdx

-Karthik S S

[Karthik S S]

Scott,

Sorry about that .. I had pasted your original post with the reply by mistake ... :-(

-Karthik S S

[Scott Dunkley]

thanks Karthik, it was the insf I had forgotten, rest has worked fine.