HP 9000 Series Service Manual

C-2 Appendix C
HotSwap Disk Bay (D Class Only)
Two versions of the HotSwap chassis have been implemented. The Model D2xx systems
will offer an optional HotSwap upgrade which will allow the low end servers to replace
their single-ended SCSI disks with the Fast/Wide SCSI hot-plugable disk modules. This
upgrade will supply a HotSwap module that will support up to two hot-plugable disk
modules. The Model D3xx systems will come standard with a HotSwap module that
supports up to five hot-plugable disk modules.
The HotSwap system is comprised of a backplane PCA, mechanical chassis, two
interconnect cables, up to five disk modules and a Fast/Wide SCSI interface. The
mechanical chassis with backplane PCA, is installed in the lower peripheral bay of the
HP 9000 D Class Server. A flat ribbon cable connects this module to the SCSI interface
located in the GSC/HP-HSC/EISA card area of the system. The second cable is the
HotSwap presence cable and it is attached between the backplane and the System/Core
I/O-board. Its connection sets a Hot-Swap presence bit which is used by the firmware.
The HotSwap system allows for two SCSI interfaces to be installed which can share
access to the hot-plugable disk modules and their externally connected F/W SCSI
devices. Systems containing two interface cards can only support one set of externally
connected peripherals.

HP 9000 Series Specifications

General

Operating System	HP-UX
Manufacturer	Hewlett-Packard (HP)
Series	9000
Type	Server
Processor	PA-RISC
Memory	Varies by model
CPU	PA-RISC processors
Expansion Slots	Varies by model
Networking	Ethernet
Form Factor	Rackmount
Models	A-Class, D-Class, E-Class, K-Class, N-Class, RP Series, Superdome