HP 6100 HP StorageWorks 4x00/6x00/8x00 Enterprise Virtual Array Updating Produ - Page 30

IBM AIX, Checking or changing timeouts, Linux

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IBM AIX Checking or changing timeouts AIX requires the disk settings shown in Table 4 for the native multipath drives. Table 4 IBM AIX timeout settings Setting PR_key_value Algorithm hcheck_interval hcheck_mode queue_depth reserve_policy rw_timeout Value NA fail_over 60 nonactive 8 Single path 60 Description Sets the key value for persistent reservations. Persistent reservations are not supported. Sets the load balancing algorithm to fail_over. All I/O uses a single path. The remaining paths are in standby mode. The value round_robin is not supported. Sets the path health feature to check each device every 60 seconds. Specifies the I/O paths monitored by the path health checking feature: nonactive-Checks all I/O paths for Failed status, and checks standby paths for Used/Opened devices. Sets the queue depth. Sets the reserve policy to standard SCSI-2 reservations. Sets the read/write timeout to 60 seconds. Linux The following configuration recommendations apply to both RedHat and SuSE. QLogic Driver parameters (failover enabled): • qdepth = 16 • port_down_retry_count = 30 • login_retry_count = 30 • failover = 1 • load_balancing = 1 • excludemodel = 0x0 • auto_restore = 0xA6 QLogic Driver parameters (single path): • qdepth = 16 • port_down_retry_count = 64 • login_retry_count = 30 • failover = 1 • load_balancing = 1 • excludemodel = 0x0 • auto_restore = 0xA6 Emulex Driver parameters (single path) 30 Pre-upgrade tasks

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IBM AIX
Checking or changing timeouts
AIX requires the disk settings shown in
Table 4
for the native multipath drives.
Table 4 IBM AIX timeout settings
Description
Value
Setting
Sets the key value for persistent reservations. Persistent reservations
are not supported.
NA
PR_key_value
Sets the load balancing algorithm to fail_over. All I/O uses a single
path. The remaining paths are in standby mode. The value round_robin
is not supported.
fail_over
Algorithm
Sets the path health feature to check each device every 60 seconds.
60
hcheck_interval
Specifies the I/O paths monitored by the path health checking feature:
nonactive
—
Checks all I/O paths for Failed status, and checks standby
paths for Used/Opened devices.
nonactive
hcheck_mode
Sets the queue depth.
8
queue_depth
Sets the reserve policy to standard SCSI-2 reservations.
Single path
reserve_policy
Sets the read/write timeout to 60 seconds.
60
rw_timeout
Linux
The following configuration recommendations apply to both RedHat and SuSE.
QLogic Driver parameters (failover enabled):
•
qdepth = 16
•
port_down_retry_count = 30
•
login_retry_count = 30
•
failover = 1
•
load_balancing = 1
•
excludemodel = 0x0
•
auto_restore = 0xA6
QLogic Driver parameters (single path):
•
qdepth = 16
•
port_down_retry_count = 64
•
login_retry_count = 30
•
failover = 1
•
load_balancing = 1
•
excludemodel = 0x0
•
auto_restore = 0xA6
Emulex Driver parameters (single path)
Pre-upgrade tasks
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