HP (Hewlett-Packard) A3312A Manual De Usuario

 
 
 
 
 

Troubleshooting & Diagnostics 

Module Replacement Procedures 

 
 

 

63 

 
 
 
 
 
 
 

 

Before you begin, review the requirements under “DF Disk Module Replacement Requirements” and 
ensure they are met.  

Use the following commands to reduce any logical volumes that have mirror copies on the faulty disk 
module so they no longer mirror onto that disk module. If the host fails during a process, the recovery 
process is listed at the end of each step. 

NOTE!   This procedure will use the lvreduce command to remove mirrors whose extents are 
on the defective disk. Once the disk has been replaced, use the lvextend command to re-
create the mirrors' extents on the new disk. 
 

NOTE!   Mirrors which span several disks may not have their extents placed on the disks as they 
were before. For cases where the original mirror layout needs to be preserved, the operator 
should consider deactivating the volume group with the vgchange command and following the 
steps in "DF Disk Module Replacement/Recovery Procedure for Unattached Physical Volumes 
(HP 9000 Series 800 with Strict Mirroring)". 

The 

-A n

 option is effective only in HP-UX release 10.01 and later and is not required for HP-UX release 

9.04. 

For one-way mirroring: 

# lvreduce -m <one less than num_mirror> -A n <LV name> <physical volume path> 

or, for two-way mirroring: 

# lvreduce -m <one less than num_mirror> -A n <LV name> <physical volume path> 

If you follow the example under “Example of a Disk Module Failure”, the host will display: 

# lvreduce -m <one less than num_mirror> -A n /dev/vg00/lvol4 /dev/dsk/c2t4d0  

# lvreduce -m <one less than num_mirror> -A n /dev/vg00/lvol5 /dev/dsk/c2t4d0