IBM 6C1 Boot options and limitations, Boot support and limitations of storage adapters, Fast boot

2.5.1 Boot options and limitations

Information about boot options is included in the subsequent sections.

Boot support and limitations of storage adapters

At the time of writing, the following adapters support external boot for the Models 6C1 and 6E1:

￿PCI Dual Channel Ultra3 SCSI Adapter (# 6203)

￿PCI Universal Differential Ultra SCSI Adapter (# 6204)

￿PCI Single-Ended Ultra SCSI Adapter (# 6206)

￿Advanced SerialRAID Plus Adapter (# 6230)

The PCI 4-Channel Ultra3 SCSI RAID Adapter (# 2498) does not support boot from external devices.

Internal devices

Boot support is available for every internal SCSI disk.

External devices

Table 2-3provides a map that enables you to determine if boot is supported in external storage devices.

Table 2-3 Boot support - external devices

Does the PCI card have RAID functionality?

Yes	No
The PCI card is seen as a	The PCI card is seen as a adapter.
controller and therefore we
	Does the external devices have RAID functionality?
have no boot support.
	Yes	No
	No boot support (except	Boot support
	Advanced SerialRAID Plus
	adapter)

Note: SSA boot is possible from an Advanced SerialRAID Plus Adapter, provided a non-RAID SSA disk is included as part of the configuration. Other disks associated with the adapter can be RAID, but at least one disk must be a non-RAID SSA disk. The non-RAID SSA disk can be located under the covers of a processor unit or in an external SSA storage unit. If your system is running with AIX 4.3.3 or later software, native boot capability is supported.

For factory system orders with AIX preload requested, an internal SCSI disk drive will be preloaded as the native boot disk, even if internal SSA disk drive(s) are present.

Fast boot

The Models 6C1 and 6E1 offer a Fast Boot option. For more detailed information, refer to “Fast boot” on page 23.

Chapter 2. Architecture and technical overview 17