Managing HP Serviceguard for Linux, Sixth Edition, August 2006

Planning and Documenting an HA Cluster
Hardware Planning
Chapter 4 93
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 F/W
SCSI and FibreChannel.
LUN Number
Indicate the number of the LUN as defined in the
storage unit.
Slot Number
Indicate the slot number in which the SCSI or
FibreChannel interface card is inserted in the
backplane of the computer.
Address
Enter the bus hardware path number, which is the
numeric part of the host parameter, which can be seen
on the system by using the following command:
# “cat /proc/scsi/scsi”
Disk Device File
Enter the disk device file name for each SCSI disk or
LUN.
Information from this section of the worksheet is used in creating the
mirrored disk configuration using LVM. 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; your system may provide other utilities as well.
• ls /dev/cciss/c* (Smart Array cluster storage)
• ls /dev/hd* (non-SCSI/FibreChannel disks)
• ls /dev/sd* (SCSI and FibreChannel disks)
•du
• df