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тАО02-08-2002 03:29 PM
тАО02-08-2002 03:29 PM
I have a system that was built with a scsi id of 5. I need the system to boot from scsi address 6 and yes you guessed it, it is LVM. How do I change to boot address in the system without rebuilding the drive?
Thanks,
Kel
Solved! Go to Solution.
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тАО02-08-2002 03:33 PM
тАО02-08-2002 03:33 PM
Re: Change scsi ID
You could use the setboot command.
setboot -p [Hw path] -b on
Regards,
Eric
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тАО02-08-2002 03:35 PM
тАО02-08-2002 03:35 PM
Re: Change scsi ID
First, use setboot to change which drive to boot from.
Second, if you have another empty disk in id 6, mirror the disk in 5 to 6, then break the mirror and leave the disk in 6 as the primary.
** This assumes that you have MirrorDisk/UX and OnlineJFS, as well as a free disk in id 6.
Otherwise your problem will require you to use setboot, shutdown the server, move the disk, and then reboot.
I think option one is the easier.
Of course you will probably get some more ideas from other contributors.
GL,
C
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тАО02-08-2002 03:41 PM
тАО02-08-2002 03:41 PM
Re: Change scsi ID
Please let me know.
Thanks,
Kel
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тАО02-08-2002 03:44 PM
тАО02-08-2002 03:44 PM
Re: Change scsi ID
The guys who built it, inadvertantly did so from address 5. They would like to change it to address 6 without rebuilding the drive. It is my understanding setboot does a firmware of stable store change, but what I really need is to tell the operating system the drive it should be booting from is 6. Can I do this without building it again?
Thanks,
Kel
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тАО02-08-2002 03:50 PM
тАО02-08-2002 03:50 PM
SolutionOr are you saying the drive itself was installed at 5 and now needs to be changed to 6?
If it is the first, then it will probably be easier to reinstall on the drive at SCSI ID 6. If you have a tape drive on this machine you can create a make_tape_recovery tape, then boot from the tape, change the root disk to the one at id 6 and let it rebuild your machine.
If the drive itself needs to changed from ID 5 to ID 6, then you still need to reinstall as there are VG and LV structures that look at the device file, which would change with the ID change.
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тАО02-08-2002 04:03 PM
тАО02-08-2002 04:03 PM
Re: Change scsi ID
Your second scenario is the correct one.
What it sounds like is there is no protocol for changing the HW address of the drive once it is set and have it successfully boot without crashing the LVM. (That is without reinstalling the OS.) I have seen it done successfully from an interactive ignite session from a boot tape, but again that required a reinstall of the OS. I was hoping for a faster solution.
FYI for me question. What other files besides /etc/lvmtab does the file system reference /dev/vg00 to /dev/dsk/c#t#d# on your root disk?
Points to follow.
Thanks to all for the info.
More info is always welcome.
Kel
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тАО02-08-2002 04:07 PM
тАО02-08-2002 04:07 PM
Re: Change scsi ID
Or you can decide whether a simple SCSI address is worth changing...
Bill Hassell, sysadmin
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тАО02-08-2002 04:26 PM
тАО02-08-2002 04:26 PM
Re: Change scsi ID
Thanks all,
Kel
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тАО02-09-2002 10:23 AM
тАО02-09-2002 10:23 AM
Re: Change scsi ID
Good idea to have the ones "broke it" "fix it"!
kelli, you made a comment that your application is looking for a specific disk drive, for what reason would anyone do such a thing? I'm just wondering why, not being nasty :-)
live free or die
harry