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03-20-2013 09:51 PM
03-20-2013 09:51 PM
Disks have different device file names
Its HP-UX 11.31. Server's hba card get faulty. after replacing it, the server has detected the storage vdisks as different device file name, resulting in failure of vg activation.
Older device file names are /dev/dsk/c4t0d5 and /dev/dsk/c9t0d4, which are physically no more.
New device file names are /dev/dsk/c9t0d2 and /dev/dsk/c9t0d3
Below are the steps/information which I have taken collected. Now need to recover my VG.
# vgexport -p -s -m /tmp/VG99.map /dev/VG99
# vgexport /dev/VG99
# mkdir -m 755 /dev/VG99
# mknod /dev/VG99/group c 64 0x010000
# vgimport -s -m /tmp/VG99.map /dev/VG99
Couldn't access the list of physical volumes for volume group "/dev/VG99".
VGSCAN:
vgscan: Couldn't access the list of physical volumes for volume group "/dev/VG99".
Physical Volume "/dev/dsk/c9t0d2" is not part of a Volume Group
Physical Volume "/dev/dsk/c9t0d3" is not part of a Volume Group
# strings /etc/lvmconf/VG99.conf
CONFIG01
/dev/VG99
/dev/rdsk/c4t0d5
/dev/rdsk/c9t0d4
LVMREC01
LVMREC01
VGDA0001
VGSA0001P
#
I think, I need to recreate the VG and before importing need to rename the device file names with new ones.
Gurus, need help!!
Ghazanfar Aziz
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03-20-2013 10:57 PM
03-20-2013 10:57 PM
Re: Disks have different device file names
>>
Older device file names are /dev/dsk/c4t0d5 and /dev/dsk/c9t0d4, which are physically no more.
New device file names are /dev/dsk/c9t0d2 and /dev/dsk/c9t0d3
IMHO this is impossible, because the "old" LUNs were 4 and 5, the new LUNs are 2 and 3.
These may be the wrong LUNs!
Did you adjust zoning and presentation? The new HBA comes with a new WWN.
Hope this helps!
Regards
Torsten.
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03-21-2013 12:51 AM
03-21-2013 12:51 AM
Re: Disks have different device file names
Zoning and presentation is OK.
Also checked the new disk with diskinfo and it is showing the correct values.
Second, is there any possibility by creating a new VG?
Ghazanfar Aziz
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03-21-2013 10:52 PM
03-21-2013 10:52 PM
Re: Disks have different device file names
Do you habe a single FC HBA only in this server?
Looks like somebody presented the LUNs with new numbers.
These numbers are set on the storage, so check and correct the settings.
You may also use "vgscan -v -p", but better to correct the presentation settings.
Hope this helps!
Regards
Torsten.
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those who understand binary, and those who don't.
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03-22-2013 03:56 AM
03-22-2013 03:56 AM
Re: Disks have different device file names
Hi,
If HBA is replaced,wwn will be changed.
check what is the status of fc using
ioscan -kfnC fc
ioscan -fnC fc
look for wwn in fcmsutil.
regards
Madhu
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03-27-2013 10:27 PM
03-27-2013 10:27 PM
Re: Disks have different device file names
This may helps you :- Import the VG with the current device.
vgimport -m /tmp/VGname.map /dev/VGname /dev/dsk/c9t0d2 /dev/dsk/c9t0d3