HP-UX 11i v3 - LVM: How to Replace a Mirror Boot Disk Using Agile DSF

HP-UX 11i v3 - LVM: How to Replace a Mirror Boot Disk Using Agile DSF

Information

A boot disk may get damage even if it is mirror and then it has to be replaced.

In this document disk8 is used for the example.

Details

1.    Check if the disk to be replaced.

# ioscan -fnkNC disk 
Class     I  H/W Path  Driver S/W State   H/W Type     Description 
=================================================================== 
disk      8  64000/0xfa00/0x2  esdisk   NO_HW     DEVICE       HP 36.4GST336754LC 
                      /dev/disk/disk8      /dev/disk/disk8_p2   /dev/rdisk/disk8     /dev/rdisk/disk8_p2 
                      /dev/disk/disk8_p1   /dev/disk/disk8_p3   /dev/rdisk/disk8_p1  /dev/rdisk/disk8_p3 

2.    Detach the physical volume from the volume group.

# pvchange -a N /dev/disk/disk8_p2 

3.    Physically replace the disk..

4.    Replacing and executing ioscan again would not report the disk as CLAIMED yet.

The AUTH_FAILED state can be seen using the scsimgr command. This is a security mechanism implemented on HP-UX 11.31 to avoid replacing the bad disk unless user explicitly authorizes it from the OS.

# scsimgr get_info -D /dev/rdisk/disk8 
        STATUS INFORMATION FOR LUN PATH : lunpath2 
Generic Status Information 
SCSI services internal state                  = UNOPEN 
Open close state                              = AUTH_FAILED 

5.    Notify the mass storage subsystem that the disk has been replaced.

# scsimgr -f replace_wwid -D /dev/rdisk/disk8 dsf 

NOTE: The key dsf at the end of the command.

6.    Create a description file to create the EFI partitions.

# vi /tmp/idf 
3  
EFI 500MB  
HPUX 100%  
HPSP 400MB  

7.    Use idisk to setup the disk partitioning using the file created above.

# idisk -wf /tmp/idf /dev/rdisk/disk8  
# insf -e -H 64000/0xfa00/0x2 

8.    Verify the state disk and efi partitions:

# ioscan -fnNH 64000/0xfa00/0xa2 

9.    Use mkboot to format and populate the newly created EFI partition:

# mkboot -e -l /dev/dsk/disk8 

10. Change the AUTO file contents:

# vi /tmp/auto

boot vmunix -lq

# efi_cp -d /dev/rdisk/disk8_p1 /tmp/auto /efi/hpux/auto

11. Restore the LVM headers.

# vgcfgrestore -n vg00 /dev/rdisk/disk8_p2 

12. Activate the disk:

# pvchange -a y /dev/rdisk/disk8_p2 

13. Reactivate the volume group to attach the physical volumen.

# vgchange -a y vgXX 

NOTE: In case that the volume group do not start to synchronize the logical volumes automatically, user can force synchronization with:

# vgsync vgXX 

14. Use lvlnboot to ensure that the LVM logical volumes are prepared to boot.

# lvlnboot -R 
# lvlnboot -v 

15. Update /stand/bootconf to reflect the current boot disks.

# cat /stand/bootconf 
l /dev/disk/disk8