8x00 Enterprise Virtual Array updating product software guide (XCS 6.200) (5697-7958, February 2009)

Checking timeo

ut values

• The key timeout setting in the registry a t HKEY_LOCAL_MACHINE/SYSTEM/

CurrentContr

olSet/Disk/TimeoutValue should be set to 3c (60 seconds)

HP-UX

CAUTION:

BecauseHP-UXsupportsbootacrossFibreChannelSAN,anychangetodefaultSCSItimeoutsonthe

HP-UXhostmaycausecorruptionandmakethesystemunrecoverable.

Default timeout values

• Sdisk timeout: 30 seconds

• (LVM) lvol timeout: 0 seconds

Checking timeout values

• Device within a L VM volume group: pvdisplay /dev/dsk/cxtxdx

• lvol physical volume with an LVM group: lvdisplay /dev/vgxx/lvolx

Changing timeout values

Pvchange -t (seconds) /dev/dsk/cxtxdx

Linux

The follow ing conﬁguration recommendations apply to both RedHat and SuSE.

QLogic Driver parameters (failover enabled):

• qdepth = 16

• port_down_retr y_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_retr y_count = 64

• login_retry_count = 30

• failover = 1

• load_balancing = 1

• excludemodel = 0x0

• auto_restore = 0xA6

Emulex Driver parameters (single p ath)

• HPELXLPFC=y

• nodev_timeout=60

• qdepth=30

Pre-upgrade tasks