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тАО09-07-2004 01:29 PM
тАО09-07-2004 01:29 PM
D class Disk Hot Swapping
I have 2 disk mirrored in the D class server and one of them has failed. Based on your past experience, do I need to shut down the server to replace it?
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тАО09-07-2004 02:01 PM
тАО09-07-2004 02:01 PM
Re: D class Disk Hot Swapping
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тАО09-08-2004 12:28 AM
тАО09-08-2004 12:28 AM
Re: D class Disk Hot Swapping
-unplugg the bad disk
-vgchange -a y /dev/vg00 (if it is vg00)
this is to make sure, the system has recognized we unplugged the disk to avoid data corruption
-insert the new disk
-vgcfgrestore -n /dev/vg00 /dev/rdsk/...
-vgchange -a y /dev/vg00
-vgsync
Another way is to first reduce the mirror with lvreduce, but this only works if the old disk is still accessible. If the disk is a boot disk, it has to be made bootable after that with mkboot /dev/dsk... and lvlnboot -R.
Best regards
Stefan
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тАО09-08-2004 08:43 PM
тАО09-08-2004 08:43 PM
Re: D class Disk Hot Swapping
This actually depends on the type of D-Class!
D3xx always have hot-swap disks, so Stefan s right for those.
D2xx do not have a hot-swap disk bay by default, but you can have. So first check whether the disks have a blue latch to pull them out, these are the hot-swap disks and you can use Stefan's procedure.
In case you have other disks, remove the old disk from your LVm configuration, shut down the server and remove the disk and add the new disk again to the configurtaion.
Hope this helps,
Charly
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тАО09-09-2004 01:09 PM
тАО09-09-2004 01:09 PM
Re: D class Disk Hot Swapping
1. Remove the disk
2. Replace the disk
3. Run following commands
# vgcfgrestore -n /dev/vg00 /dev/rdsk/cxtydz (x,y,z --- denotes the Faulty Disk)
# vgchange -a y /dev/vg00
# mkboot /dev/rdsk/cxtydz
# mkboot -a "hpux (;0)/stand/vmunix" /dev/rdsk/cxtydz
# lvlnboot -R
#lvlnboot -v ( To ensure the Boot definitions are accurate)
# vgsync /dev/vg00 (to Synchronize the mirrored logical volumes)
I have stopped the diagnostic (using /sbin/init.d/diagnostic stop) as the dialogd process is using too much CPU.
I'm afraid that if the new disk is defective, the dialogd process will start to consume too much CPU again. Therefore I intend to start it 2 days after the disk is synchronised fully. Any comments
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тАО09-10-2004 02:15 AM
тАО09-10-2004 02:15 AM
Re: D class Disk Hot Swapping
Josh
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тАО09-12-2004 12:03 PM
тАО09-12-2004 12:03 PM
Re: D class Disk Hot Swapping
Bill Hassell, sysadmin