setboot -a vs setboot -h

[Jaime Bolanos Rojas.]

Can somebody give me a good explanation of what is the different between the setboot -a and the setboot -h command? I know the man page states the -h command is for High Availability but that still does not explain to me what´s is the difference.

Regards,

Jaime.

[Rasheed Tamton · Accepted solution]

The High Availability Alternate (HAA) is supported only on Itanium-based architecture and for PA-RISC systems that support hardware partitions.

HAA is designed as the second boot device. In such a situation, the HAA would be set (using parmodify) to be the address of the disk containing the mirrored volumes. You could set the Alternate bootpath to be a third mirror if you had configured it.
Pri - Searched first
HAA - Searched second
Alternate - Searched third

Instead of having only a Primary (PRI) and an Alternate (ALT) Boot Path, now ther is an additional Boot Pathâ a High Availability Alternate (HAA). By default, this device is searched second in the list of boot devices. To set the HAA Boot Path, we need to use either the BCH PATH HAA command or the Partition Manager parmodify command.

parstatus -Vp X (shows the boot paths)

Regards.

[Jaime Bolanos Rojas.]

Thanks a lot, that does make a lot of sense now!

Regards,

Jaime.