how to fail a mirrored disk for testing ? 1

[MoshiachNow]

Hi,

I have 2 system disks,one of them mirrored.

For testing the mirroring procedure we have made- I'd like to cause one of the disks to fail ,without removing them physically (6F1 machine).

I was thinking of "dd" into it,but I think it will fail both disks.

Any ideas ? "Long live king Moshiach !"
h

http://www.noahide.com/movement.htm

 

[DSMARWAY]

why don't you just change the bootlist so that the system boots off the mirror copy .

 

[MoshiachNow]

Thanks,but

My idea is how to simulate the "close-to-real-life" situation,when the disk developes hdisk errors in errpt DURING the operation. "Long live king Moshiach !"
h

http://www.noahide.com/movement.htm

 

[DSMARWAY]

How about splitting off the mirror copy ,using chlvcopy this will test whether the mirror copy can be accessed , split and the re-mounted and check if the data is still there atthe time of the split.

The only other real test would be to physical remove the disk

 

[MoshiachNow]

thanks "Long live king Moshiach !"
h

http://www.noahide.com/movement.htm

 

[Yegolev]

I think you should pull the cable. Best test there is. Hope you have a backup. IBM Certified -- AIX 4.3 Obfuscation

 

[AIX5L]

Shedule Downtime ;->
When the 6F1 has hotplug Disk remove the Disk.
Other ways are:
lspv -l hdisk0
lspv -l hdisk1
When both shows the same number of pps and the lsvg -l VGNAME is in syncd state
the mirror will be ok.

another good way is to boot from the copy.

Experimantel ways are:

When you are a ODM Hacker you can delete the Disk in the ODM ( backup bevore ! )

Splitlvcopy will be a good Command to show the state of a FS, but you are loosing the mirror when you test the splilvcopy ;->

DD is not a good, because the PVID will be also copied.

You can delete the VGDA with dd ( firts Block )

 

[MoshiachNow]

Thanks,

I intended to dd into the first block.

Also will try deleting from ODM. "Long live king Moshiach !"
h

http://www.noahide.com/movement.htm