HP StorageWorks 2.128 SAN Director Switch - Manual (Page 79)

Fabric OS 5.x administrator guide 79
CAUTION: To ensure a nondisruptive download, for each nondirector class switch in your fabric,
complete all firmware download changes before issuing the
firmwareDownload
command on the next
switch.
HP StorageWorks fixed-port models and each CP blade of the Core Switch 2/64, SAN Director 2/128,
and 4/256 SAN Director have two partitions of nonvolatile storage areas (a primary and a secondary) to
store two firmware images. The
firmwareDownload
command always loads the new image into the
secondary partition and swaps the secondary partition to be the primary. It then reboots the partition and
activates the new image. Finally, it performs the
firmwareCommit
procedure, to copy the new image to
the other partition.
Effects of firmware changes on accounts and passwords
Table 14 describes what happens to accounts and passwords when you replace the switch firmware with
a different version. Upgrading means installing a later version of firmware. Downgrading means installing
an earlier version.
Considerations for downgrading firmware
The following items must be considered before attempting to downgrade to an earlier version of
Fabric OS:
• If your fabric is set to the extended edge PID format and you want to downgrade to an earlier Fabric
OS version that does not support extended edge, you must change the PID to a supported format. For
more information, see ” Configuring the PID format ” on page 213.
• Downgrading a SAN Director 2/128 that is configured for two domains from Fabric OS 4.4.0 to
Fabric OS 4.2.0 is not supported.
• If you are running Fabric OS 4.0.2 firmware on a SAN Switch 2/32, you cannot downgrade to an
earlier version.
Considerations for FICON CUP environments
To prevent channel errors during nondisruptive firmware installation, the switch CUP port must be taken
offline from all host systems.
Upgrading HP StorageWorks switches
The 4/8 SAN Switch, 4/16 SAN Switch, SAN Switch 2/8V, SAN Switch 2/16V, SAN Switch 2/32,
Brocade 4Gb SAN Switch for HP p-Class BladeSystem, and SAN Switch 4/32 maintain primary and
secondary partitions for firmware. The
firmwareDownload
command defaults to an autocommit option
that copies the firmware from one partition to the other.
Table 14 Effects of firmware changes on accounts and passwords
Change First time Subsequent times (after upgrade, then
downgrade, and then upgrade)
Upgrading Default accounts and their passwords
are preserved.
User-defined and default accounts and
their passwords are preserved.
Downgrading User-defined accounts are no longer
valid. Default accounts and their
passwords are preserved. If a default
account was disabled, it is reenabled
after the downgrade.
User-defined and default accounts and
their passwords are preserved, including
accounts added after the first upgrade.
Upgrading to
version 3.2.0
(You might upgrade a switch in the fabric as part of ” Checking connected switches ”
on page 77.) Earlier versions allowed you to change the default account names. You
cannot add user-defined accounts until you change the names back to default with the
passwdDefault
command.