IBM eserver i5 Handbook page 308

5486Towr.fm
in the base 15 disk unit slots and the removable media devices in the two
removable media slots.
For Models 270, 800, 810, 820, 825, 830, 840, 870, and 890, up to nine disk
controllers can be used in one tower driven by OS/400 or Linux. Each disk
controller can then be attached to one or more disk unit enclosures which contan
five disks each. The #5703 PCI-X RAID Disk Unit Controller can be used after
three #2757/#4748/#4778 controllers are installed. The #0143 Disk Controller
Placement Exception is a prerequisite for the #5703. Up to 18 disk units per
#2757 are supported in the system unit or external tower disk cage of the Model
270, 800, and 810. Up to 15 disk units per #2757 are supported in a #9094 Base
PCI I/O Enclosure attached to a Model 870 or 890.
For Models 520, 550, 570, and 595, a maximum of nine #5703/#5715 (any
combination) are supported per #5094. There is no requirement for a
#2757/#4748/#4778 controller to be installed. The number of
#2757/#4748/#4778 installed in a #5094 is limited to a maximum of three.
Up to 20 disk units per #2757 are supported in a #5094 PCI-X Expansion Tower
attached to a Model 520, 550, 570, or 595.
A bus adapter to provide the HSL interface to the system is included. Select one
of the following options:
#6417 HSL-2/RIO-G Bus Adapter (for upgrades only)
#9517 - Base HSL-2/RIO-G Bus Adapter (copper) for attachment to 520, 550,
570, and 595
#9876 - Base Optical Bus adapter (replacement for #9886)
#9877 - Base HSL-2 Bus adapter (replacement for #9887)
#9886 - Base Optical Bus Adapter to specify two optical HSL ports
#9887 - Base HSL-2 Bus Adapter to specify two copper HSL-2 ports
One or two 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 and cables. A copper loop can intermix I/O towers
and 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.
Copper HSL to HSL-2 (HSL on one end and HSL-2 on the other end)
Copper HSL-2 (HSL-2 on both ends of the cable)
Optical HSL
IBM Eserver i5 and iSeries System Handbook
274
Draft Document for Review October 18, 2004