device file missing /dev/rdsk/...

[John McWilliams_1]

Hi All

The problem showed up while increasing a logical volume size. The error was "A device is missing from lvmtab"

All devices have 4 paths to an EMC DMX

device file /dev/dsk/c15t1d5 exists but the device file /dev/rdsk/c15t1d5 does NOT exist.

All other device files are OK

I was thinking insf -e would fix this. Can someone please confirm this.
To fix the lvm issue, I have a copy of lvmtab before the problem occured. A diff between this file and the current running file shows this 1 device missing. Can I just copy this previous file back over the existing and all will be OK ?

Thanks John

[Hasan Atasoy]

hi john ;

1. insf -C disk
if not solved
2. find hw path of this disk by ioscan -funC disk and "rmsf -H hw_path" and insf -C disk.

Hasan.

[Murat SULUHAN]

Hi

After you delete with rmsh, you should run ioscan -fnC disk before insf -C disk

Best Regards
Murat

[erics_1 · Accepted solution]

John,

Get the device file recreated and then move the original lvmtab back in place of the newer one. Run vgdisplay -v against the vg to confirm all PV's are present.

Regards,
Eric

[Mridul Shrivastava]

Only raw device file is missing to you can just recreate it using the mknod command and then copy over the old copy of lvmtab file.. this should fix up the issue.

Please make sure that you are using the correctã major and minor no... please refer the block special file for the same disk for details on major and minor no.

[John McWilliams_1]

Thanks all for the replies so far. I ran insf -e and this re-created the device file. After close of business today I will copy the old lvmtab file back and update here.
Thanks John

[John McWilliams_1]

Thanks again everyone. I have now copied the old lvmtab file over the current one and checked all is ok again with the volume group.

[John McWilliams_1]

insf -e recreated the device file
Copied the backup lvmtab into place.
All ok