Solaris; Vmware; Xen Citrix; Managing Application I/O Timeouts For An Online Upgrade - HP EVA P6000 Software Manual

NOTE: OpenVMS tolerates the controller reboot that occurs at the end of the controller software
upgrade process. Disks on the controller display the Mount Verify status during the controller reboot
but return to Mounted status and resume I/O operations when the controller reboot is complete.
You do not need to change any OpenVMS default settings when performing an online controller
software upgrade.
Online controller software upgrades are supported in OpenVMS cluster environments where the
array is the cluster boot device.

Solaris

Solaris supports online controller software 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 the /etc/system file:
set sd:sd_io_time=60
set ssd:ssd_io_time=60
For the QLogic driver, edit the /kernel/drv/qla2300.conf file and change the
hbax-link-down-timeout value to 60:
hba0-link-down-timeout=60;
For the Emulex driver, edit the /kernel/drv/lpfc.conf file and change the linkdown-tmo
value to 60:
linkdown-tmo=60;

VMware

VMware ESX (Hypervisor) does not time I/O for a guest operating system. Therefore the SCSI
timeouts on commands issued by each VMware guest (Linux, Windows, Solaris) are the timeouts
set for these systems.

Xen Citrix

For Xen Citrix, (except for NFS SR timeouts because Citrix XenServer 5.0 mounts using software
with nondefault timeout values) use the values described in
To check or set Xen Citrix parameters, use the set_parm executable located in the
/opt/hp/<driver>
directory. When executed, the options to change timeout values are displayed.
NOTE:
You must increase timeout values for Emulex single path (without multipath support) and QLogic
single path used in this environment. This is important for both online upgrades and general
data integrity.
Online controller software upgrades are not supported with Xen Citrix boot devices.

Managing application I/O timeouts for an online upgrade

Applications are typically insulated from the online controller software upgrade by the operating
system and HBA driver software. Consequently, if the application is running on a properly configured
operating system, the online controller software upgrade will complete successfully. Evaluate any
"Linux Red Hat and SUSE" (page
Managing application I/O timeouts for an online upgrade
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