HP StorageWorks XP12000 HP StorageWorks XP Disk Array Configuration Guide: HP- - Page 17

Configuring disk array devices, XP Disk Array Configuration Guide for HP-UX

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4. Construct the device file name for each device, using the device information, and enter the file names in your table. Use the following formula to construct the device file name: cxtydz where: • x = SCSI bus instance number • y = SCSI target ID • z = LUN • c stands for controller • t stands for target ID • d stands for device The numbers x, y, and z are hexadecimal. Table 4 Device file name example SCSI bus instance number 00 00 Hardware path 14/12.6.0 14/12.6.1 SCSI TID LUN 6 0 6 2 File name c6t0d0 c6t0d1 5. Verify that the SCSI TIDs correspond to the assigned port address for all connected ports (see mapping tables in Appendix B on page 37, for values). If so, the logical devices are recognized properly. If the logical devices are not recognized properly: • Check the AL-PA for each port using the LUN Manager software. • If the same port address is set for multiple ports on the same loop (AL with HUB), all port addresses except one changed to another value, and the relationship between AL-PA and TID does not correspond to the mapping given in Appendix B on page 37, set a different address for each port, reboot the server, and then verify new device recognition again. • If unused device information remains, the TID-to-AL-PA mapping will not correspond to the mapping given in Appendix B on page 37. Renew the device information, and then verify new device recognition again. Configuring disk array devices Disk arrays are configured using the same procedure for configuring any new disk on the host. This includes the following procedures: 1. Verifying the device files and drivers 2. Creating the device files 3. Creating the physical volumes 4. Creating new volume groups 5. Creating logical volumes 6. Creating the file systems 7. Setting the I/O timeout parameter 8. Creating the mount directories XP Disk Array Configuration Guide for HP-UX 17

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4.
Construct the device file name for each device, using the device information, and enter the file
names in your table. Use the following formula to construct the device file name:
cxtydz
where:
•
x
= SCSI bus instance number
•
y
= SCSI target ID
•
z
= LUN
•
c
stands for controller
•
t
stands for target ID
•
d
stands for device
The numbers
x
,
y
, and
z
are hexadecimal.
Table 4 Device file name example
File name
LUN
SCSI TID
Hardware path
SCSI bus instance
number
c6t0d0
0
6
14/12.6.0
00
c6t0d1
2
6
14/12.6.1
00
5.
Verify that the SCSI TIDs correspond to the assigned port address for all connected ports (see
mapping tables in
Appendix B
on page 37, for values). If so, the logical devices are recognized
properly.
If the logical devices are not recognized properly:
•
Check the AL-PA for each port using the LUN Manager software.
•
If the same port address is set for multiple ports on the same loop (AL with HUB), all port ad-
dresses except one changed to another value, and the relationship between AL-PA and TID
does not correspond to the mapping given in
Appendix B
on page 37, set a different address
for each port, reboot the server, and then verify new device recognition again.
•
If unused device information remains, the TID-to-AL-PA mapping will not correspond to the
mapping given in
Appendix B
on page 37. Renew the device information, and then verify
new device recognition again.
Configuring disk array devices
Disk arrays are configured using the same procedure for configuring any new disk on the host. This
includes the following procedures:
1.
Verifying the device files and drivers
2.
Creating the device files
3.
Creating the physical volumes
4.
Creating new volume groups
5.
Creating logical volumes
6.
Creating the file systems
7.
Setting the I/O timeout parameter
8.
Creating the mount directories
XP Disk Array Configuration Guide for HP-UX
17