Tag Archives: io tree

Migrating a ServiceGuard cluster to another storage

03/11/2009 – 14:44

Here are the steps for offline migrating a Serviceguard cluster to another SAN: create a LUN list:no. of source box no. of source LUN size of source LUN no. of target box no. of target LUN size of target LUN

By Viktor Balogh | Posted in HP-UX Serviceguard, HP-UX system administration, Storage | Also tagged , , , , , , , , | Comments (0)

Understanding the HW path of SAN disks

08/05/2009 – 09:19

A line from the ioscan output: Class       I  H/W Path       Driver    S/W State   H/W Type     Description ============================================================================= disk      224  0/3/1/0/4/0.1.64.0.0.2.0    sdisk     CLAIMED     DEVICE       HITACHI DISK-SUBSYSTEM <HBA/Interface card> 0/3/1/0/4/0 <Domain (~switch number)> 1 <Area (physical port number)> 64 <Port (always o in a switched fabric)> 0 <Virtual SCSI Bus> 0 <SCSI target> 2 <SCSI LUN> 0 [...]

By Viktor Balogh | Posted in Hardware, Servers | Also tagged , , | Comments (3)

Reorganizing IO tree – general steps

26/04/2009 – 17:33

Make a system recovery tape Collect IO trees from all nodes concerned Decide on the format of the standardized IO tree Document the current device file – HW path mapping Establish which system and user applications use current device files Create an ASCII file representing the new IO tree Shut down the system(s) to single [...]

By Viktor Balogh | Posted in HP-UX system administration | Also tagged , | Comments (0)