system hangs while vgscan or print_manifest

[bhavin asokan]

hi,

system model: L2000-44
OS : hpux 11.0
diskarray : EVA5000

see error and ioscan details in attachment.
the server is running sybase database and application enviornment .it is also used as a backup server running dataprotector.

whenever i will give a command like vgscan,print_manifest,or diskinfo for the diskarray specific lun ,it starts giving error and system hangs .only one lun is used for this server.

if AUTO_VG_ACTIVATE in the /etc/lvmrc is set to 1 ,after starting server and starts giving error.

now a days i set AUTO_VG_ACTIVATE to zero.after rebooting server i manually enables the vg and gives fsck command to all lvols and mount it.after that it will not give error upto next query of this disk(lun).

how i can solve this problem.how i will find out the problem is with disk /fc card /server

thanks

regds,

[Robert-Jan Goossens]

Hi,

---
Jan 22 13:14:38 dev vmunix: LVM: VG 64 0x040000: PVLink 31 0x080100 Failed! The PV is not accessible.
---

# ll /dev/dsk | grep 0x080100

# dd if=/dev/rdsk/c8t0d1 of=/dev/nul bs=1024k

check for errors, but it looks like above disk is failing.

Hope this helps,
Robert-Jan

[Bill Hassell]

Hangs with vgscan, lvlnboot, vgdisplay, pvdisplay, etc are almost always due to disk failures. In your case, the failure has been logged in syslog. While disk mirroring works fairly, some types of failures, especially during bootup, will cause activation failures. Auto-activation will always work when there are no disk errors or disk corruption.