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тАО04-24-2008 02:25 AM
тАО04-24-2008 02:25 AM
lost LVM after changed scsi cable's path
I have one disk array connected to my server via scsi cable. I unpluged the scsi cable for some maintainment reason. After that I re-plug in the scsi cable and reboot the server but the server couldn't boot up due to missing all the LVM in the disk array.
I guess maybe this is because I have re-plugged to different scsi port. But the problem is that my server has quite a lot of scsi ports, I couldn't remember where is the original scsi port's location. I have tried different location, but still failed.
Can someone help on this. Without change back the original scsi port's location, how can I find my missing lvm? or where can I find the original scsi path? Thanks.
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тАО04-24-2008 02:44 AM
тАО04-24-2008 02:44 AM
Re: lost LVM after changed scsi cable's path
You already found the source of the problem...
2 possible solutions:
1) plug the cable back to the original port
2) adjust the LVM config (vgexport/import)
I would prefer 1)
Further steps depend on the system model.
What is it (PA-RISC or Integrity)?
Hope this helps!
Regards
Torsten.
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тАО04-24-2008 04:22 AM
тАО04-24-2008 04:22 AM
Re: lost LVM after changed scsi cable's path
ioscan / insf
If you don't the ctd (/dev/dsk/c1td0 etc) numbers won't change. And you'll never re-connect.
If you have the original ctd numbers and provide the hardware make/model we can probably figure out which port to plug into.
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тАО04-24-2008 04:26 AM
тАО04-24-2008 04:26 AM
Re: lost LVM after changed scsi cable's path
How would you run ioscan or anything as long as the server does not boot?
"...the server couldn't boot up due to missing all the LVM..."
But searching methods from the boot prompt are very different for PA_RISC and Integrity - that's why I asked for ...
Hope this helps!
Regards
Torsten.
__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.
__________________________________________________
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тАО04-24-2008 05:48 PM
тАО04-24-2008 05:48 PM
Re: lost LVM after changed scsi cable's path
My server module is PA.
Correct my server couldn't boot up, so I couldn't do any ioscan.
And I tried many different connections, but still couldn't work. I also suspect that even one time I put back to original place, it may still not work....
Thanks very much for your help...
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тАО04-24-2008 09:11 PM
тАО04-24-2008 09:11 PM
Re: lost LVM after changed scsi cable's path
Main Menu: Enter command or menu > pa
Primary boot path: intscsib.2
0/0/1/1.2
0/0/01/01.2 (hex)
Alternate boot path: intscsia.2
0/0/2/0.2
0/0/02/0.2 (hex)
and tell us *exactly* the server model and the model of your disk chassis there is a good chance to find the right connector.
Hope this helps!
Regards
Torsten.
__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.
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тАО04-24-2008 10:18 PM
тАО04-24-2008 10:18 PM
Re: lost LVM after changed scsi cable's path
My server is very old L class 9000/800/L3000-7x.
pri-path: 0/0/1/1.2
alt-path: 0.0/2/0.2
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тАО04-24-2008 10:23 PM
тАО04-24-2008 10:23 PM
Re: lost LVM after changed scsi cable's path
Your primary and alternate pathes points to internal disks - you should be able to boot from! Regardless of the external disks.
At least in single user mode.
Try this first and we will see!
Hope this helps!
Regards
Torsten.
__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.
__________________________________________________
No support by private messages. Please ask the forum!
If you feel this was helpful please click the KUDOS! thumb below!