topic Re: can't remove a DSF in Operating System - HP-UX

can't remove a DSF

Andrew S. Chipalyuk — Thu, 27 Nov 2008 05:07:59 GMT

I can't remove the DSF because device is busy:

# rmsf -v -a /dev/disk/disk18
Device /dev/disk/disk18 is busy. Cannot remove.

HP-UX B.11.31

# model
ia64 hp server rx6600

# ioscan -kfnNH 64000/0xfa00/0x21
Class I H/W Path Driver S/W State H/W Type Description
===================================================================
disk 18 64000/0xfa00/0x21 esdisk NO_HW DEVICE HP OPEN-V*18
/dev/disk/disk18 /dev/rdisk/disk18

# ioscan -m dsf /dev/disk/disk18
Persistent DSF Legacy DSF(s)
========================================
/dev/disk/disk18 /dev/dsk/c19t0d1
/dev/dsk/c25t0d1

# strings /etc/lvmtab
/dev/vg00
/dev/disk/disk6_p2
/dev/vgu02
/dev/disk/disk16
/dev/vg09
/dev/disk/disk23

# pvdisplay -l /dev/disk/disk18
pvdisplay: Couldn't open physical volume "/dev/disk/disk18":

Re: can't remove a DSF

vjta — Thu, 27 Nov 2008 06:46:44 GMT

Hi Andrew,

try with
rmsf -H for disk18

regards
vjta

Re: can't remove a DSF

Andrew S. Chipalyuk — Thu, 27 Nov 2008 07:01:14 GMT

Hello, vjta!

# rmsf -v -H 64000/0xfa00/0x21
Device at 64000/0xfa00/0x21 is busy. Cannot remove.

Re: can't remove a DSF

vjta — Thu, 27 Nov 2008 09:31:06 GMT

Hi,
pls post O/P of ioscan -m dsf

regards
vjta

Re: can't remove a DSF

vjta — Thu, 27 Nov 2008 09:32:26 GMT

Hi,
>>>>>>disk 18 64000/0xfa00/0x21 esdisk NO_HW DEVICE HP OPEN-V*18
/dev/disk/disk18 /dev/rdisk/disk18

Pls see the O/p NO_HW

just give diskinfo also

regards
vjta

Re: can't remove a DSF

Andrew S. Chipalyuk — Thu, 27 Nov 2008 09:51:19 GMT

# ioscan -m dsf
Persistent DSF Legacy DSF(s)
========================================
/dev/rdisk/disk6 /dev/rdsk/c0t0d0
/dev/rdisk/disk6_p1 /dev/rdsk/c0t0d0s1
/dev/rdisk/disk6_p2 /dev/rdsk/c0t0d0s2
/dev/rdisk/disk6_p3 /dev/rdsk/c0t0d0s3
/dev/rdisk/disk10 /dev/rdsk/c27t0d1
/dev/rdsk/c29t0d1
/dev/rdsk/c31t0d1
/dev/rdsk/c33t0d1
/dev/pt/pt16 /dev/rscsi/c18t0d0
/dev/rscsi/c24t0d0
/dev/rdisk/disk16 /dev/rdsk/c27t0d2
/dev/rdsk/c29t0d2
/dev/rdsk/c31t0d2
/dev/rdsk/c33t0d2
/dev/rdisk/disk17 /dev/rdsk/c0t9d0
/dev/rdisk/disk18 /dev/rdsk/c19t0d1
/dev/rdsk/c25t0d1
/dev/pt/pt22 /dev/rscsi/c26t0d0
/dev/rscsi/c28t0d0
/dev/rscsi/c30t0d0
/dev/rscsi/c32t0d0
/dev/rdisk/disk23 /dev/rdsk/c27t0d3
/dev/rdsk/c29t0d3
/dev/rdsk/c31t0d3
/dev/rdsk/c33t0d3
/dev/rdisk/disk26 /dev/rdsk/c0t7d0
/dev/rdisk/disk28 /dev/rdsk/c0t8d0

# diskinfo /dev/rdisk/disk18
diskinfo: can't open /dev/rdisk/disk18: No such device or address

Re: can't remove a DSF

vjta — Thu, 27 Nov 2008 09:59:39 GMT

Hi,

try insf -e

& then check diskinfo
also
check diskinfo with legacy path c19t0d1

regards
vjta

Re: can't remove a DSF

vjta — Thu, 27 Nov 2008 10:16:02 GMT

Hi,

pls check for the path also whether it is degraded or fialed.

pls post :
scsimgr -p lun_map -D /dev/rdisk/disk40

from this command find which paths are failed or degraded.
Disable them with
scsimgr disable
and then do

rmsf -v -H 64000/0xfa00/0x21(This address taken from your above output)

Pls check & revert

thanks & regards
vjta

Re: can't remove a DSF

vjta — Thu, 27 Nov 2008 10:17:37 GMT

hi,
SORRY!
In cmd scsimgr read disk18(for ur case) instead of disk40.

regards
vjta

Re: can't remove a DSF

Andrew S. Chipalyuk — Thu, 27 Nov 2008 10:38:39 GMT

The "insf -e" rescanned device and stoped on device escsi:

# insf -e
insf: Installing special files for asio0 instance 2 address 0/0/1/2
insf: Installing special files for sdisk instance 3 address 0/3/1/0.97.1.0.0.0.1
insf: Installing special files for sdisk instance 11 address 0/3/1/0.97.1.0.0.0.2
.....
....
insf: Installing special files for pseudo driver sy
insf: Installing special files for pseudo driver kepd
insf: Installing special files for pseudo driver diag2
insf: Installing special files for pseudo driver root
insf: Installing special files for pseudo driver escsi

# scsimgr -p lun_map -D /dev/rdisk/disk18
lunpath:4:0/3/1/0.0x50060e801419cf10.0x4001000000000000:fibre_channel:SUSPENDED:ACTIVE
lunpath:22:0/7/1/0.0x50060e801419cf00.0x4001000000000000:fibre_channel:SUSPENDED:ACTIVE

# scsimgr disable -D /dev/rdisk/disk18

CRA REPORT SUMMARY:
Critical Resources Analysis(CRA) reported SUCCESS.
No resources usages have been identified during the analysis.

Do you really want to disable (y/[n]) ? y
scsimgr: LUN /dev/rdisk/disk18 disabled successfully

# rmsf -v -a /dev/disk/disk18
Device /dev/disk/disk18 is busy. Cannot remove.

Re: can't remove a DSF

vjta — Thu, 27 Nov 2008 10:44:36 GMT

try with rmsf -H

if possible reboot the server.

regards
vjta

Re: can't remove a DSF

Andrew S. Chipalyuk — Thu, 27 Nov 2008 11:39:02 GMT

# rmsf -v -H 64000/0xfa00/0x21
Device at 64000/0xfa00/0x21 is busy. Cannot remove.

I tryed reboot the server before, it was helping. But without reboot, i can't remove any dsf, even if storage array is not available.

Re: can't remove a DSF

vjta — Mon, 01 Dec 2008 07:54:05 GMT

Hi Andrew ,
Sorry for delay.

Can u try to remove this LDEV from ur SAN Sorage. once u removed this LDEV from SAN storage just checked by ioscan.

Also check the latest cumulative patches kit installed.

Pls check for rmsf : http://docs.hp.com/en/5992-3373/ch09s06.html

regards
vjta

Re: can't remove a DSF

Andrew S. Chipalyuk — Mon, 01 Dec 2008 08:28:24 GMT

Yes, i tried to remov the LDEV from the SAN Storage and then checked by ioscan. It wasn't help.

Re: can't remove a DSF

Eric SAUBIGNAC — Mon, 01 Dec 2008 10:03:44 GMT

Bonjour Andrew,

What about "fuser /dev/disk/disk18" and "fuser /dev/rdisk/disk18"

Eric

Re: can't remove a DSF

Andrew S. Chipalyuk — Mon, 01 Dec 2008 10:40:19 GMT

Hello Eric!

# fuser /dev/rdisk/disk18
/dev/rdisk/disk18:
# fuser /dev/disk/disk18
/dev/disk/disk18:

Re: can't remove a DSF

Eric SAUBIGNAC — Mon, 01 Dec 2008 10:56:25 GMT

And same test on the corresponding legacy devices files : /dev/dsk/c19t0d1, /dev/rdsk/c19t0d1, /dev/dsk/c25t0d1 and /dev/rdsk/c25t0d1 ?

Eric

Re: can't remove a DSF

Andrew S. Chipalyuk — Mon, 01 Dec 2008 11:17:25 GMT

I already tried to remove the legacy devices (/dev/dsk/*). The legacy devices (/dev/dsk/*) was removing successfully, but persistent devices (/dev/disk/*) wasn't removing in any case.