HP (Hewlett-Packard) A3312A Manual De Usuario

 
 
 
 
 
Troubleshooting & Diagnostics 
Module Replacement Procedures 
 
 

 
64 
 
 
 
 
 
 
 

If the host failed during an 

lvreduce

 command, you should execute an 

lvdisplay

 command to 

determine if the command succeeded. If the command did not succeed, the command should be executed 
again. 

You should perform any other 

lvreduce

 commands that had not been executed before the system failure, 

then proceed. 

NOTE!   An important side effect of the lvreduce commands is that the LVM configuration 
backup file used by the vgcfgrestore command in step 1 is updated. If this hot plug procedure 
is being performed now on another host system and there was no need to execute any 
lvreduce

 commands, then the configuration file has not been updated. However, the LVM 

configuration is correct on the physical volumes, so the configuration file can be updated with the 
vgcfbackup

 command. 

a. Replace the disk module if you have not done so already.  

b. Perform an 

ioscan

 on the new disk module to ensure that it is accessible and also, as a double check, 

that it is a proper replacement. 

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

# ioscan /dev/dsk/c2t4d0 

HP uses different manufacturers for disks having the same product number. The manual hot plug 
procedure will not update the disk module’s internal information to that of the replaced disk. 

Replacement disks must have the same capacity and block size as the defective disk because they have the 
same product number. The only field that could be incorrect is the string specifying the vendor's name. 
This will not affect the behavior of the LVM. If you want to update the manufacturer's name, the disk's 
volume group must be deactivated and reactivated. 

Use the following commands to restore the LVM configuration/headers to the replaced disk modules from 
your backup of the LVM configuration: 

# vgcfgrestore -n <volume group name> <physical volume path> 

For example, the host will display: 

# vgcfgrestore -n /dev/vg00 /dev/rdsk/c2t4d0 

Repeat step 3 to ensure all the configuration data is written to the new disk.