3PAR InForm OS 2.3.1 Upgrade Pre-Planning Guide

Release 2.3.1 Upgrade Pre-Planning Guide InForm OS Version 2.3.1

3.2 Host Configuration Guidelines

Observe the following host configuration guidelines when planning an online InForm OS

update:

■ All attached hosts must have multi-pathing software in place and operational for every

storage server volume exported, and the host(s) must be connected to two horizontally

adjacent nodes on the InServ Storage Server.

■ Multi-pathing cabling must adhere to 3PAR configuration rules: each defined host must

have at least two operational paths attached to two horizontally adjacent nodes (i.e. even-

numbered node, followed by a consecutive odd-numbered node. Valid pairings are 0 & 1, 2

& 3, 4 & 5, 6 & 7. Invalid pairings are 2 & 1, 0 & 3.).

■ All host paths must be identified with a single host name.

NOTE: Check the 3PAR Configuration Matrix for supported multi-pathing

environments.

WARNING: An InServ Storage Server running InForm OS 2.2.4.158 or lower

version, utilizing iSCSI with CHAP authentication connecting to all supported

hosts will be affected in two scenarios:. a revert to or an InServ reboot

(

shutdownsys reboot) on InForm OS 2.2.4.158 or lower version, will fail to re-

enable all paths to a host.

Advise that all hosts connecting this way should be upgraded to 2.2.4.MU6. If

during the upgrade a revert does occur, then on the Inserv re-issue the target

CHAP password. This must be followed by issuing the discovery of targets

command on the host. This will re-enable all previous CHAP enabled iSCSI paths to

the host.

NOTE: For unsupported environments, the hosts should be shut down (and in

some cases powered off), or the VLUNs exported to these hosts must be

unexported, or FC logically disconnected before execution of the online InForm

OS update.