HP A4500A - VMEbus Single Board Computer 744 Motherboard Hardware Manual page 165

HotPlug Disk Drive Removal (HPUX Systems Only)
The disk drives (up to two) are located at the front left side of the server (as you are facing it). When proper
software and hardware procedures are followed, these disk drives can be removed and replaced while the
server is running.
NOTE MPE/iX does not support hotswap. Do not use these procedures on HP e3000 servers.
The procedures in this section are in two parts, a software HotPlug procedure to prepare the drive for removal
and the hardware procedures for physically removing the device from the server.
Before starting these procedures, you must have an up-to-date configuration backup file. Configuration
backup is performed by default each time an LVM command changes the LVM configuration. The default
backup file path is:
/etc/lvmconf/base_vg_name.conf
The replacement disk drive must be the same product ID as the disk drive that is being replaced.
NOTE HP often uses different manufacturers for disks that have the same product number. The
HotPlug manual procedure will not update the disk drivers internal information to that of the
replaced disk drive.
The replacement disk drive will have the same capacity and blocksize as the defective disk because they have
the same product number. The only field that can be incorrect is the string specifying the vendor's name. This
will not affect the behavior of the LVM. If you desire to update the manufacturer's name, the disks volume
group must be deactivated and reactivated.
HotPlug Software Procedure
NOTE The HotPlug software procedures for Disk Drive removal/replacement described below are for a
mirrored boot disk configuration only. If your configuration differs from this, these procedures
may not be valid. Consult your System Administrator or contact the HP Response Center for
assistance.
Perform these software procedural steps to replace a HotPlug disk drive device:
Step 1. Determine whether or not the LVM found the physical volume to be defective when the volume
group was activated.
If the volume was defective when the volume group was activated, vgchange would have generated
the following message to the console:
WARNING
VGCHANGE: WARNING: COULDN'T ATTACH TO THE VOLUME GROUP PHYSICAL
VOLUME "/DEV/DSK/cXtXdX"
VGCHANGE: WARNING: COULDN'T ATTACH TO THE VOLUME GROUP PHYSICAL
Chapter
HotPlug Disk Drive Removal (HPUX Systems Only)
237