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Installing the A5150A Adapter
Looking at Adapter Installation
Chapter 2 23
card that operated at a maximum of 33 MHz would not work on a bus
running at 66 MHz. rad provides information about the bus frequency
and power available at a slot, as well as other slot-related data.
On-Line Replacement (OLR) When on-line replacing an interface
card, the replacement card must be identical to the card being replaced
or at least be able to operate using the same driver as the replaced card.
This is referred to as like-for-like replacement and should be adhered to
because using a similar but not identical card may cause unpredictable
results. For example, a newer version of the target card which is
identical in terms of hardware may contain an updated firmware version
that could potentially conflict with the current driver.
The PCI specification allows a single physical card to contain more than
one port. A single-port SCSI bus adapter can not be replaced by a
dual-port adapter, even if the additional port(s) on the card are identical
to the original SCSI bus adapter.
When the replacement card is added to the system, the appropriate
driver for that card must be configured in the kernel before beginning
the operation. SAM ensures the correct driver is present. (In most cases,
the replacement card will be the same type as a card already in the
system, and this requirement will be automatically met.) If you have any
question about the driver’s presence, or if you are not certain that the
replacement card is identical to the existing card, you can use ioscan
together with rad to investigate.
• If the necessary driver is not present and the driver is a dynamically
loadable kernel module (DLKM), you can load it manually. Refer to
the section “Dynamically Loadable Kernel Modules” in Chapter 2 of
the document: Configuring HP-UX For Peripherals, HP Part Number
B2355-90698 for more information.
• If the driver is static and not configured in the kernel, then the card
cannot be On-line Added. The card could be physically inserted
on-line, but no driver would claim it.