HP 9000 Series, Service Manual

Page: 467 / 472

Appendix C C-13
HotSwap Disk Bay (D Class Only)
HotSwap Procedure
Follow these steps to replace a hotswap disk module.
Step 1
• Check if the LVM found the physical volume to be defective when the volume group
was activated.
• The vgchange would have printed the following message on the console:
WARNING
VGCHANGE: WARNING: COULDN'T ATTACH TO THE VOLUME GROUP PHYSICAL
VOLUME "/DEV/DSK/cXtXdX"
THE PATH OF THE PHYSICAL VOLUME REFERS TO A DEVICE THAT DOES NOT
EXIST, OR IS NOT CONFIGURED INTO THE KERNAL.
• If the status of the vgchange is unknown, you may check if this occurred by doing a
vgdisplay command:
# vgdisplay BB VG name EB
For our example:
# vgdisplay /dev/vg00
• If the disk was defective at vgchange time, the following messages will be printed one
or more times.
WARNING:
VGDISPLAY: WARNING: COULDN'T QUERY PHYSICAL VOLUME "/DEV/DSK/cXtXdX"
THE SPECIFIED PATH DOES NOT CORRESPOND TO PHYSICAL VOLUME ATTACHED
TO THE VOLUME GROUP.
VGDISPLAY: WARNING: COULDN'T QUERY ALL OF THE PHYSICAL VOLUMES.
• If you see these messages, the disk was defective at the time the volume group was
activated.
Hot swapping a disk which was defective during activation requires a different sequence
of commands. Skip to the alternative procedure,"Hot Swap Procedure for Unattached
Physical Volumes," at the end of this document.
Otherwise, your disk became defective after the vgchange and you must continue with
step 2 of this procedure.
Step 2
• Reduce any logical volumes that have mirror copies on the faulty disk so that they no
longer mirror onto that disk (note the -A n option):
# lvreduce -m 0 -A n BB LV name EB /dev/dsk/cXtXdX for 1 way mirroring