Replacing Shadowed Boot Drive

From: Shawn (shawnm1964_at_sbcglobal.net)
Date: 04/29/05 

Date: 29 Apr 2005 06:27:31 -0700

Hi All,

I have a 1000A 5/400 Alpha Server running OpenVMS 7.2-1 which currently
utilizes Disk Shadowing on all the drives including the boot drives.

The boot drive is made up of (2) 4.3GB shadowed disk drives. I am
going to replace both of these drives with (2) 9.1GB Disk Drives and
re-enable shadowing.

I would like to list the steps I plan to follow and see if any of you
have any suggestions or corrections my plan. I have no extra drives to
copy the data from the system drives too, so I have to use a DLT Tape
Drive. The backup command I am going to use is backup and then restore
is my main concern.

1. Comment any scripts called from startup which mount any disks.
2. Modify the modparams.dat file and set SHADOW_SYS_DISK to 0
3. Run the following command autogen savparams setparams.
4. Shutdown the application.
5. Show device/files to ensure all files are closed.
6. Run analyze/disk/repair to fix anything on the drive which could
cause a problem.
7. Dismount a member of the shadow set.
8. Shutdown the system
9. Boot from an OpenVMS 7.2-1 CD and enter DCL mode.
***** These next steps I would appreciate your comments on******
10. Mount one of the system drives: mount/over=id dkb0:
11. Backup the drive to tape as an image: back/image/log/ign=label
dkb0: mka500:dkb0.sav/save
12. After the backup completes dismount the tape and disk drive: dism
mka500: dism dkb0:
13. Shutdown the server and replace the drives.
14. Boot again off the CD Drive.
15. Mount the new drive to be restored too. mount/for dkb0:
16. Restore Data from tape: back/image/ign=label/verify
mka500:dkb0.sav dkb0:
17. After the restore has finished dismount tape and disk drives.
18. Shutdown the system and then boot from dkb0:
19. When server has come back up, modify startup scripts to mount
drives as usual.
20. Modify modparams.dat file and set SHADOW_SYS_DISK = 1
21. Run the following command autogen savparams setparams.
22. Reboot the server.
23. After the server comes back up and all drives are mounted complete
the final step of adding the 2nd drive to the shadow set.
mount/system/noassist DSA0:/shadow=($1$dkc0:) ALPHASYS

Let me know if you see anything I need to change or modify

Thanks in advance
Shawn

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