Detecting HP-UX Disk issues
1.1.vgdisplay
2.vgdisplay <volume grp>
3.vgdisplay -v <vol grp> perform this on all vg’s found
4.ioscan -fn | grep NO_HW
5. ioscan -fnkH <disk id> , you can get disk id from command (4) points to which disk tht is having issues.
Now verify on all the vgdisplay cmd, should see atleast 1 disk is unavailabe and stale..so you will know which disk and LVM is problematic. Try to sync the disk, if still can;t Contact local vendor for replacement. Check whether the disk is mirrored and stripped ?? 
( Mirrored is ok but it is stripped then gotta becareful). break the mirror for engineer to swap and resync again to sync the disk.
Im not good in HPUX Volume management, im more to AIX and Linux but slowly learning on HP-UX. The worst till today which i can’t absorb is Sun Solaris !!
