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

OpenVMS

The default value for LUN timeout is 120 seconds.

NOTE: OpenVMS handles the controller reboot seen at the conclusion of the firmware update

process. Disks on the controller display a Mount Verify status during the controller reboot but regain

Mounted status and resume I/O operations upon the completion of the controller reboot. No

changes need to be made to any OpenVMS default settings when performing an online controller

software upgrade.

Online controller software upgrades are supported in OpenVMS cluster environments where the

EVA is the cluster boot device.

Solaris

Solaris supports online controller upgrades with the following driver timeouts:

• Sun Drivers (qlc or emlxs): 60 seconds

• QLogic (qla2300): 60 seconds

• Emulex (lpfc): 60 seconds

Checking or changing timeouts

For Sun drivers, add the following lines to /etc/system file:

set sd:sd_io_time = 60

set ssd:ssd_io_time = 60

For QLogic, edit the /kernel/drv/qla2300.conf file and change the

hbax-link-down-timeout value to 60 as follows:

hba0-link-down-timeout=60;

For Emulex, edit the /kernel/drv/lpfc.conf file and change the linkdown-tmo value to

60 as follows:

linkdown-tmo=60;

Tru64

Tru64 has a 60 second timer for media command timeouts. In most cases, up to 5 retries can occur

within the kernel's I/O stack, which results in a 5–6 minute window before I/O is returned to the

file system. No changes should be made to any Tru64 settings when performing an online controller

software upgrade.

Online controller software upgrades are supported in Trucluster 4–node environments where the

EVA is the cluster boot device.

VMware

VMware ESX (Hypervisor) does not time I/O for a guest operating system. Thus the SCSI timeouts

on commands issued by each VMware guest (Linux, Windows, Solaris) are those provided for

these systems.

30 Pre-upgrade tasks