HP A6829A PCI Dual Channel Ultra160 SCSI Host Bus Adapter Service and User Guide (May 2003)

Installing the A6829A Adapter

Chapter 220

The PCI speciﬁcation allows a single physical adapter to contain more

than one channel. A single channel SCSI adapter cannot be replaced by a

dual channel adapter, even if the additional channel(s) on the adapter

are identical to the original SCSI adapter.

When the replacement adapter is added to the system, the appropriate

driver for that adapter must be conﬁgured in the kernel before beginning

the replacement operation. SAM ensures the correct driver is present.

(In most cases, the replacement adapter will be of the same type as an

adapter already in the system, and this requirement will be

automatically met.) Keep the following things in mind:

• If the necessary driver is not present and the driver is a dynamically

loadable kernel module (DLKM), you can load it manually. See the

section “Dynamically Loadable Kernel Modules” in Conﬁguring

HP-UX For Peripherals for more information.

• If the driver is static and not conﬁgured in the kernel, then the

adapter cannot be added online. The adapter could be physically

inserted online, but no driver will claim it. Note that the SCSI c8xx

driver is a static driver.

If you have any question about the driver’s presence, or if you are not

certain that the replacement adapter is identical to the existing adapter,

you can use the ioscan command together with the rad command to

investigate.

SAM does not allow the A6829A adapter to be suspended in either of the

following situations:

• If the adapter is being used (for example, if a ﬁle system is mounted).

• If the CRA shows that a critical resource (for example, swap space or

the root ﬁle system) depends on the adapter.

After you replace an A6829A adapter online, SAM checks the

replacement adapter to make sure it is permitted, according to the

like-for-like rules. If the adapter is permitted, SAM automatically

activates it. If it is not permitted, SAM displays an error message.