8x00 Enterprise Virtual Array Updating Product Software Guide (XCS 6.240)

Table 4 IBM AIX timeout settings

DescriptionValueSetting

Sets the key value for persistent reservations. Persistent reservations are not

supported.

NAPR_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_overAlgorithm

Sets the path health feature to check each device every 60 seconds.60hcheck_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.

nonactivehcheck_mode

Sets the queue depth.8queue_depth

Sets the reserve policy to standard SCSI-2 reservations.Single pathreserve_policy

Sets the read/write timeout to 60 seconds.60rw_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)

• HPELXLPFC=y

• nodev_timeout=60

• qdepth=30

• discovery_threads=1

28 Pre-upgrade tasks