Mount and umount of disk

[Wendy_9]

Hi all,

Our system has two mount points to the SAN disk. SAN disk has removed but not inform the system support to umount the disk first. Therefore, when some program query such SAN disk, disk error log will generate to the syslog.log.

But the owner for SAN disk claims that SAN configuration for our system was removed at their side and SAN disk had already not accessible when our system startup last time. And they said that it should somehow a software problem in HPUX.

I do not feel that it is the case because I can see the mount point by "bdf" but at their side (SAN), no entry has find for our system.

Can anyone experience such symptoms and give me some evidences to support me??

Thanks

Regards,
Wendy

[Sridhar Bhaskarla]

Hi Wendy,

Evidence to support you.

1. Look at /etc/rc.log and search for localmount. It should not list any errors at that place. This means, the filesystems were mounted perfectly at the boot time. It means that the filesystems were available that time which means the disk.

2. DO a vgdisplay -v on the volume group that is (was) having this disk. If it is successful mean, it was successfully activated. Go to the bottom of the output, it should display that disk in "unavailable" status. If the disk was not accessable, the VG wouldn't get activated.

3. Scroll through /var/adm/syslog.log. Search for PV. You should see messages like POWERFAILED. Note down the date and time. That's when they pulled the disks off.

4. Your bdf check.

-Sri

[Wendy_9]

Hi,

1/ I had already reboot the system so /etc/rc.log can be overwrite.

2/ Now, the disk is umounted after reboot so vgdisplay cannot give the evidence.

3/ Only I can find the POWERFAIL at OLDsyslog.log to indicate the disk disconnect.

Regards,
Wendy

[Wendy_9]

Hi,

One more thing, I have find POWERFAILED at 23:15 but I know that the disk has removed at around 12:00 afternoon.

Why the POWERFAILED message has appear so late? Is such message can only trigger when someone access such disk

Thanks

Regards,
Wendy

[Sridhar Bhaskarla]

Hi,

So, your 'bdf' was before rebooting the box. However if you rebooted the box only once and if you have not customized the recycling of you syslog, you would still have OLDsyslog.log and rc.log.old.

About the POWERFAIL message, is your system configured in the same Timezone as of the timezone of your place?.

-Sri

[Ross Zubritski]

Sri- Let's chat.

RZ