19 Jul 22 Disk issues on HP-UX

So you are having disk problems:

Scenario 1:

You need to build a logical volume on a disk that is in the kernel. You have other issues that will not let you completely replace /etc/lvmtab

mv /etc/lvmtab /etc/lvmtab.save

vgscan -av

You need that disk number 967 to change.

ioscan -NfnCdisk shows the offending device files

 /dev/disk/disk967

 /dev/rdisk/disk967

64000/0xfa00/0x102

What to do?

Force the system to hand out new device files.

rmsf /dev/rdisk/disk967

rmsf /dev/disk/disk967

rmsf -H 64000/0xfa00/0x102

scsimgr -h lun_reset -D /dev/rdisk/disk967

insf -e

Possible alternative:

vgreduce -f /dev/vgname

Trick of the day if you are seing flapping on the SAN. Such as a scenario where deices are giong on and ofline.

ioscan -fN | wc -l ## Gets you a count.

drop the wc -l and you get a pretty detailed look at the HBA/SAN/disk infrastructure.

ioscan -fN