Linux
NOTE:
RHEL4/SLES9 SCSI device has a default 30 second timeout value and up to 5 retries can occur.
RHEL5/SLES10 SCSI device has a default 60 second timeout and also up to 5 retries can occur. In
general, these timeout periods are adequate to accommodate an EVA online firmware upgrade.
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 = 0xA0
QLogic Driver parameters (single path):
• qdepth = 16
• port_down_retry_count = 64
• login_retry_count = 30
• failover = 0
• load_balancing = 1
• excludemodel = 0x0
• auto_restore = 0xA0
Emulex Driver parameters (single path)
• HPELXLPFC=y
• nodev_timeout=60
• qdepth=30
• discovery_threads=1
Emulex Driver parameters (with Multipulse)
• nodev_timeout=10
• qdepth=16
• discovery_threads=32
To check or set Linux parameters, use the set_parm executable found in the /opt/hp/
<driver-specific> directory. When executed, the options to change timeout values are displayed.
HP StorageWorks Enterprise Virtual Array updating product software guide (XCS 09522000) 33
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