IBM eserver i5 Handbook page 281

Draft Document for Review October 18, 2004
Each enclosure supports 45 disk unit positions, for a total of 90. The 90 disk unit
positions are in groups of 15, each supported by a minimum of one separate disk
controller.
The #8094 also supports up to four removable media devices (internal tape,
CD-ROM, DVD). These removable media devices are supported by the two
#2757 PCI-X Ultra RAID Disk Controllers, #4748/#4778 PCI RAID Disk Unit
Controllers, or #9778 Base PCI Raid Disk Unit Controllers that can support the
first group of disk units in each enclosure.
The two enclosures in the #8094 are separately attached to the system unit via
HSL cables as though they were a stand-alone #9094 and #5094. They are also
treated as separate units for HSL loop plugging and configuration rules and
recommendations. As such, the bottom enclosure must be attached to the
system unit's first HSL loop.
A bus adapter is included to provide the HSL interface to the top enclosure.
Select one of the following options:
#9886 Base Optical Bus Adapter, to specify four optical HSL ports
#9887 Base HSL-2 Bus Adapter, to specify four copper HSL-2 ports
Three or four cables must be ordered to attach to the HSL or HSL-2 ports.
When ordering cables to connect to the HSL interface, optical HSL, copper HSL,
copper HSL-2, or copper HSL to HSL-2 cables are required. An HSL loop uses
all optical or all copper ports/cables. A copper loop can intermix I/O towers or
units with copper HSL and copper HSL-2 ports. Select the appropriate cable
based on the type of HSL ports to which it is being attached, and the cable length
required.
Specify three or four line cords for the #8094 Optional 1.8 M I/O Rack.
If the top enclosure is to be attached to a different system than what was initially
ordered, remove for Record Purpose Only (RPO) the #0694 #5094 Equivalent
specify code from the initially ordered system and add it to the target system.
A schematic of the #8094 Optional 1.8 M I/O Rack is shown below.
5486m890.fm
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iSeries Model 890