Disk device files deletion

[Usman]

On one of our HP-UX 11i system, all disk device files like /dev/dsk/c5t5d0 are accidently deleted. Therefore 'vgdisplay' command produces the following error.

vgdisplay: Warning: couldn't query physical volume "/dev/dsk/c0t6d0":
The specified path does not correspond to physical volume attached to
this volume group

/etc/lvmtab file has the correct volume group information and LV information on physical volume should also be clean and intact. So there shouldn't be a need of vgsacn and vgcfgrestore. System is also running fine so far. Should we just create disk device files using mknod command? Raw device files /dev/rdsk/c5t5d0 are still intact, so minor number for device files can be determined.

[Michael Tully]

If they were removed like this:

# rm /dev/dsk/cxtydz

You may be able to re-create them with

# insf -e

Do they still appear in the ioscan output?

# ioscan -fnC disk

Or were they removed using a different method?

[KapilRaj]

insf -e

as stated in prev comment ... I wonder u may need to
mv /etc/lvmtab /etc/lvmtab.old
vgscan

As the device filenames may get changed if the order in which they are searched are diffrent from the original config.

Kaps

[David Child_1]

I assume that since you only assigned 5 points to the other replies that 'insf -e' did not work.

Did 'ioscan -fnCdisk' show the disks as CLAIMED or maybe NO_HW? What does 'diskinfo /dev/rdsk/c#t#d#' report?

If these are SAN fabric attached devices then perhaps someone moved the storage port (e.g. storage was connected to switch/director at port X and was moved to port Y). This will change the controller number and show up on the server as new device files. The old ones will then no longer be used (unless the storage port is moved back to its original location). If this is the case then you will have some cleanup to do.

David