Managing Serviceguard 13th Edition, February 2007

Planning and Documenting an HA Cluster
Hardware Planning
Chapter 4 143
Disk I/O Information
This part of the worksheet lets you indicate where disk device adapters
are installed. Enter the following items on the worksheet for each disk
connected to each disk device adapter on the node:
Bus Type Indicate the type of bus. Supported busses are Fibre
Channel and SCSI.
Slot Number Indicate the slot number in which the interface card is
inserted in the backplane of the computer.
Address Enter the bus hardware path number, which will be
seen on the system later when you use ioscan to
display hardware.
Disk Device File Enter the disk device file name. To display the name
use the ioscan -fnC disk command (for legacy DSFs)
or ioscan -fnNC disk (for agile addressing).
Information from this section of the worksheet is used in creating the
mirrored disk configuration using Logical Volume Manager. In addition,
it is useful to gather as much information as possible about your disk
configuration. You can obtain information about available disks by using
the following commands:
• diskinfo
• ioscan -fnC disk or ioscan -fnNC disk
• lssf /dev/*dsk/*
• bdf
• mount
• swapinfo
• vgdisplay -v
• lvdisplay -v
• lvlnboot -v
• vxdg list (VxVM; and CVM if supported)
• vxprint (VxVM; and CVM if supported)
These are standard HP-UX commands. See their man pages for complete
information about usage. The commands should be issued from all nodes
after installing the hardware and rebooting the system. The information
will be useful when doing storage group and cluster configuration. You
can mark up a printed listing of the output from the lssf command to
indicate which physical volume group a disk should be assigned to.