topic Cannot create filesystem on EMC disk in Operating System - HP-UX

Cannot create filesystem on EMC disk

Jouni Riekkinen — Wed, 19 Oct 2005 04:49:27 GMT

I have some disk space allocated on a EMC system. But I cannot create a filesystem on it. I run HP-UX 11.11.

I have entered the following commands:

bash# insf -eCdisk
bash# ioscan -fnCdisk
...
disk 4 0/2/0/0.97.8.255.1.3.0 sdisk CLAIMED DEVICE DGC LUNZ
/dev/dsk/c5t3d0 /dev/rdsk/c5t3d0

bash# newfs /dev/rdsk/c5t3d0
vxfs newfs: Cannot open /dev/rdsk/c5t3d0: Device busy

I got this Device busy message everytime trying to access the disk device. I know EMC disk resource is not accessed be anyone else.

Any tips are appreciated. Thanks in advance.

Re: Cannot create filesystem on EMC disk

Arunvijai_4 — Wed, 19 Oct 2005 04:57:03 GMT

Any veritas related processes are running ? Check # ps -ef |grep -i vx

-Arun

Re: Cannot create filesystem on EMC disk

VEL_1 — Wed, 19 Oct 2005 04:58:36 GMT

Hi,

Look at the following links:

http://forum.sun.com/thread.jspa?threadID=26060&messageID=93712
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=32502

Thanks.

Re: Cannot create filesystem on EMC disk

VEL_1 — Wed, 19 Oct 2005 05:01:14 GMT

Hi,

Use the fuser & fsck to /dev/rdsk/c5t3d0.

Thanks.

Re: Cannot create filesystem on EMC disk

Jouni Riekkinen — Wed, 19 Oct 2005 07:40:02 GMT

This may not be a volume manager issue. I cannot access the disk by any means from the OS. Even pvcreate failed and returned device busy message

Re: Cannot create filesystem on EMC disk

Bill Hassell — Wed, 19 Oct 2005 07:48:38 GMT

Since you can see the disk (and the device ID string) with ioscan, the problem is likely a mapping problem in the SAN. You can try diskinfo which is also a low-level disk command:

diskinfo /dev/rdsk/c5t3d0

If this works, the LUN has been established but the SAN may be preventing write-access.

Re: Cannot create filesystem on EMC disk

Stuart Abramson — Wed, 19 Oct 2005 08:42:45 GMT

the clue here is the "LUNZ" in the ioscan.

You have an EMC Clariion disk which is improperly configured. You have to talk to your storage team and get them to do it right. The zoning is correct, and the "storage group" is correct, but the "initiator" is probably defined wrong. If you have PowerPath you define it one way, if not then another.

Get a document from EMC called something like "HP-UX Clariion Storage Configuration Guide". Something like that...

Contact the EMC Software Assistance Center (SAC) and they can set you straight.

Re: Cannot create filesystem on EMC disk

Steve Post — Thu, 20 Oct 2005 07:24:20 GMT

pardon me, but don't you have to run "pvcreate" before you use "newfs"?

steve

Re: Cannot create filesystem on EMC disk

Mark Greene_1 — Thu, 20 Oct 2005 08:03:37 GMT

You need to reverse the order of the insf and the ioscan. Then you need to run powermt check, powermt config, and finally powermt display dev=all. You'll want to print or otherwise save the output from the last powermt command; you'll need to use the logical device ID from the Clarrion to cross-reference to the LUNs you created so you know which /dev/dsk/cxtxdx device corresponds to which LUNs. Then you should be able to do the pvcreate and then either mknod and vgcreate or vgextend if you're adding these to an existing volume group.

mark

Re: Cannot create filesystem on EMC disk

Kryno Bosman — Mon, 24 Oct 2005 02:41:01 GMT

If you would like to use that EMC-disk, you should do the following:

mkdir /dev/vg??
mknod /dev/vg?? c 64 0x??0000
pvcreate /dev/rdsk/c5t3d0

# If it is still busy of whatever. Be sure that the disks is totally yours to use.

pvcreate -f /dev/rdsk/c5t3d0
vgcreate vg?? /dev/dsk/c5t3d0
lvcreate -L vg??
newfs -F vxfs /dev/vg??/lvol1
mkdir /mountpoint
vi /etc/fstab