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Troubleshooting & Diagnostics
Module Replacement Procedures
59
Troubleshooting
If the conditions above are met, you can replace the DF disk module while the host is operating. To know
which replacement and recovery procedure to use, you must:
1. Determine if the volume group is active. See “DF Disk Module - Is the Volume Group or Physical
Volume Group Active? (HP 9000 Series 800 with Strict Mirroring)”.
• If the volume group is active, determine if the physical volume is attached. See “DF Disk Module
- Is the Physical Volume Attached? (HP 9000 Series 800 with Strict Mirroring)”.
• If the volume group is not active, follow the procedure under “DF Disk Module
Replacement/Recovery Procedure for Unattached Physical Volumes (HP 9000 Series 800 with
Strict Mirroring)”.
2. Determine if the physical volume (replaced disk module) is attached.
• If the physical volume (replaced disk module) is attached, follow the procedure under “DF Disk
Module Replacement/Recovery Procedure for Attached Physical Volumes (HP 9000 Series 800
with Strict Mirroring)”.
• If the physical volume is not attached, follow the procedure under “DF Disk Module
Replacement/Recovery Procedure for Unattached Physical Volumes (HP 9000 Series 800 with
Strict Mirroring)”.
Example of a Disk Module Failure
Use the example in Table 12 of a disk module failure to see the types of messages the host may display
while using LVM utility commands. The DF replacement/recovery procedures base their example
messages on the hardware addresses or device files shown below.
Volume group /dev/vg00 contains three discs, with the logical volume configuration shown below:
Table 12. Example Volume Group with Three Disks
1vol 1 1vol 3 1vol 4
1vol 2 1vol 4 1vol 5
1vol 3 1vol 5
Hardware Address: 52.6.0 52.5.0 52.4.0
Device File (/dev/dsk/): c2t6d0 c1t5d0 c2t4d0
NOTE! In HP-UX 9.04, the device file /dev/dsk/ naming convention is cXdXsX. (Versions
10.01 are different.)