HP StorageWorks 2/16V HP StorageWorks Fabric OS 5.X Procedures User Guide (AA- - Page 79
Table 14 Effects of firmware changes on accounts and passwords, Upgrading HP StorageWorks switches
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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. 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 Downgrading User-defined accounts are no longer valid.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. 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. Fabric OS 5.x administrator guide 79