Configuring Disk Array Devices; Changing The Device Parameters; Device Parameters-Read/Write Timeout And Queue Type - HP StorageWorks XP10000 - Disk Array Configuration Manual

3. Use the lsdev command to display system device data and verify that the system recognizes
the newly installed devices.
The devices are listed by device file name. All new devices should be listed as "Available." If
they are listed as "Define," you must do more configuration before they can be used.
Example
#lsdev -Cc disk
hdisk0 Available 10-60-00-5, 0 16 Bit SCSI Disk Drive
hdisk1 Available 10-60-00-6, 0 16 Bit SCSI Disk Drive
The example shows that Device hdisk0 is installed on bus 60 and has TID=5 and LUN=0.
4. Record the device file names for the new devices. You will use this information in changing the
device parameters.
5. Use the lscfg command to find out the AIX disk device's corresponding array LDEV designation.
Example
# lscfg
In this example, the emulation type, LDEV number, CU number and array port designation should
all be displayed for disk device hdisk3.

Configuring disk array devices

Disks in the disk array are configured using the same procedure for configuring any new disk on the
host. This includes the following procedures:

Changing the device parameters

Assigning the new devices to volume groups
Creating the Journaled File Systems
Mounting and verifying the file systems
Creating scripts to configure all devices at once may save you considerable time.
Changing the device parameters
When the device files are created, the system sets the device parameters to the system default values.
You may need to change a few of those values for each new OPEN-x device: See
5.
Read/write (R/W) timeout value
Queue depth
Queue type
Table 4 Device parameters-read/write timeout and queue type
Parameter
Read/write timeout
16 Installing and configuring AIX for the XP disk array
vl hdisk3
Default Value
30
Required Value
60
Table 4 and Table