HP XP P9500 HP StorageWorks P9000 Configuration Guide (AV400-96380, May 2011) - Page 92

Changing the device parameters using SMIT, Devices, Fixed Disk, Change/Show Characteristics of a Disk

Page 92 highlights

2. To change the queue depth parameter, enter: chdev -l hdiskx -a queue_depth='x' where x is a value from the previous table. 3. To change the queue type parameter, enter: chdev -l hdiskx -a q_type='simple' For example, enter the following command to change the queue depth for the device hdisk3: # chdev -l hdisk3 -a queue_depth='2' 4. Verify that the parameters for all devices were successfully changed. For example, enter the following command to verify the parameter change for the device hdisk3: # lsattr -E -l hdisk3 5. Repeat these steps for each OPEN-x device on the disk array. TIP: The lsattr command also shows useful information, such as LUN ID of the mapped LDEV, worldwide name of the disk array FC port, and N-Port ID. Another useful command for determining the slot position and port worldwide name of the FCA is the lscfg -v -l hdiskx command. Changing the device parameters using SMIT 1. Start SMIT. (Optional) For an ASCII session, use the smit -C command. 2. Select Devices. Example System Management Move cursor to desired item and press Enter. Software Installation and Maintenance Software License Management Devices System Storage Management (Physical & Logical Storage) Security & Users Communications Applications and Services Print Spooling Problem Determination Performance & Resource Scheduling System Environments Processes & Subsystems Applications Using SMIT (information only) 3. Select Fixed Disk. 4. Select Change/Show Characteristics of a Disk. 5. Select the desired device from the Disk menu. The Change/Show Characteristics of a Disk screen for that device is displayed. 6. Enter the correct values for the read/write timeout value, queue depth, and queue type parameters. Press Enter to complete the parameter changes. Example Change/Show Characteristics of a Disk Type or select values in entry fields. Press Enter AFTER making all desired changes. [MORE...4] 92 IBM AIX

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2.
To change the queue depth parameter, enter:
chdev
l hdisk
x
a queue_depth='
x
'
where
x
is a value from the previous table.
3.
To change the queue type parameter, enter:
chdev
l hdisk
x
a q_type='simple'
For example, enter the following command to change the queue depth for the device hdisk3:
# chdev
l hdisk3
a queue_depth='2'
4.
Verify that the parameters for all devices were successfully changed.
For example, enter the following command to verify the parameter change for the device
hdisk3:
# lsattr
E
l hdisk3
5.
Repeat these steps for each OPEN-x device on the disk array.
TIP:
The
lsattr
command also shows useful information, such as LUN ID of the mapped
LDEV, worldwide name of the disk array FC port, and N-Port ID.
Another useful command for determining the slot position and port worldwide name of the
FCA is the
lscfg
v
l hdisk
x
command.
Changing the device parameters using SMIT
1.
Start SMIT.
(Optional)
For an ASCII session, use the
smit
C
command.
2.
Select
Devices
.
Example
System Management
Move cursor to desired item and press Enter.
Software Installation and Maintenance
Software License Management
Devices
System Storage Management (Physical & Logical Storage)
Security & Users
Communications Applications and Services
Print Spooling
Problem Determination
Performance & Resource Scheduling
System Environments
Processes & Subsystems
Applications
Using SMIT (information only)
3.
Select
Fixed Disk
.
4.
Select
Change/Show Characteristics of a Disk
.
5.
Select the desired device from the Disk menu.
The Change/Show Characteristics of a Disk screen for that device is displayed.
6.
Enter the correct values for the read/write timeout value, queue depth, and queue type
parameters. Press
Enter
to complete the parameter changes.
Example
Change/Show Characteristics of a Disk
Type or select values in entry fields.
Press Enter AFTER making all desired changes.
[MORE...4]
92
IBM AIX