Stlale extents

[Eric Bradley]

Couldn't get an outage window until tomorrow, Saturday night. I will update with results when complete. We have a good Ignite image prior to the stale extents so worst case we will be able to blow that down. Fortunately, the stale extents are in /usr, which is very static since the server has been in freeze mode for a month.

[Lolupee]

Eric,

here is my advice, that may work but still proceed on your request for outage. This is just the process of replacing the defective disk, other things being equal.

Follow below steps and you may not need an outage. You would know immediately you need it.

Please, do this during the outage window. To be on the safe side shutdown all databases, go to init 2. umount all other file systems not relevant to O/S but do not forget that umount -a would umount /stand. then mount it back.

If you have your vgcfgbackup file anywhere then you can proceed. The backup file is by default in /etc/lvmconf/vg00.conf

If you physically hot swap the bad drive from the system and you can still work and access /usr then there is a change that you do not need an outage.

follow these steps.
1. # vgcfgrestore -n /dev/vg00 /dev/rdsk/
Start the mirror synchronize process.
2. # vgsync /dev/vg00 (This process takes time to resync.)
Place the boot utilities in the boot area.
3. # mkboot /dev/rdsk/
Add an Auto file in the boot LIF area.
4. # mkboot -a "hpux (;0)/stand/vmunix" /dev/rdsk/
Note: The -lq switch could be added to override quorum on HIGH AVAILABILITY systems.
EXAMPLE: # mkboot -a "hpux -lq (;0)/stand/vmunix" /dev/rdsk/

Update LIF'S Lable file with information contained in the BDRA. (Boot Data Reserved Area)
5. # lvlnboot -Rv
Getting diagnostics on the root mirror disk
List the offline diagnostics from the good root boot disk.
6. # lifls -il /dev/rdsk/cXtXd0
Copy the diagnostics to the mirror root disk.
7. # cd /usr/sbin/diag/lif
# mkboot -b updatediaglif -p ISL -p HPUX -p LABEL -p AUTO /dev/rdsk/

[Lolupee]

Eric,

just discovered that you have an Itanium server.

Then the process is different apologies. This I have not tested very well but the process I listed below is a combination of steps for replacing HPUX version root disks and steps in creating mirror root disk and I believe it should work. You do not have anything to loose except time.

You would need to create the EFI partition first.


1. Create the system, OS, and service partitions.
# vi /tmp/partitionfile
3
EFI 500MB
HPUX 100%
HPSP 400MB
# idisk -wf /tmp/partitionfile /dev/rdsk/

idisk version: 1.31
********************** WARNING ***********************
If you continue you may destroy all data on this disk.
Do you wish to continue(yes/no)? yes <-- Answer "yes" and not "y"

3. Create device files needed for the new partitions.
# insf -eC disk

4. Verify the partition table.
# idisk /dev/rdsk/
5. Verify that the device files were created properly.
# ioscan -efnC disk -->
6. Populate the /efi/hpux/ directory in the new EFI system partition.
# mkboot -e -l /dev/rdsk/

7. Change the auto file for the mirror to boot without quorum.
NOTE: Using "s1"
# echo "boot vmunix -lq" > /tmp/AUTO.lq
# efi_cp -d /dev/rdsk/s1 /tmp/AUTO.lq /EFI/HPUX/AUTO

Please, do not forget the s1 behind the newdisk CTD.

NOTE: We assume that if we boot from the primary, the mirror is fully
functional and therefore we don't need to override quorum. Your site might
require that both disks override quorum.

9. Verify the contents of the auto file on the primary and the mirror.
NOTE: Using "s1"
# efi_cp -d /dev/rdsk/s1 -u /EFI/HPUX/AUTO /tmp/AUTO.pri
# efi_cp -d /dev/rdsk/s1 -u /EFI/HPUX/AUTO /tmp/AUTO.alt
# cat /tmp/AUTO.pri
# cat /tmp/AUTO.alt


then you can proceed on the vgcfgrestore and others.

1. # vgcfgrestore -n /dev/vg00 /dev/rdsk/s2
(Note this is section 2)
Start the mirror synchronize process.
2. # vgsync /dev/vg00 (This process takes time to resync.)
systems.
Update LIF'S Table file with information contained in the BDRA. (Boot Data Reserved Area)
5. # lvlnboot -Rv
Getting diagnostics on the root mirror disk
List the offline diagnostics from the good root boot disk.
6. # lifls -il /dev/rdsk/cXtXd0s2
Copy the diagnostics to the mirror root disk.

[Simon Wickham_6]

Hi Eric,

I would recommend you issue a vgsync and then issue a strings /etc/lvmtab. Then try running the following command.

dd if=/dev/rdsk/c4t8d0 of=/dev/null bs=1024k

If you get an I/O error from dd, the disk is bad.

Regards,
Simon