IBM DS8700, Introduction And Planning Manual

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Table 22. Disk drive cable feature codes (continued)
Feature
Code Disk Drive Cable
Group Connection Type
1212 Disk drive cable group
2 Connects the disk drives to the device adapters within
the same expansion model. Used for Model 94E when
it is the first expansion model (position 1 expansion
model) within the storage unit.
1213 Disk drive cable group
3 Connects the disk drives in a Model 941 (2-way).
1214 Disk drive cable group
4 Connects the disk drives from a second expansion
model (position 2 expansion model) to the base
model. Specifically, connects the second Model 94E to
the device adapters in the base Model 941 (4-way).
1246 Disk drive cable group
1 - standard Connects the disk drives to the device adapters within
the same base Model 951.
1247 Disk drive cable group
2 - standard Connects the disk drives to the device adapters within
the same expansion Model 95E. Used when the Model
95E is the first expansion model (position 1) within
the storage unit.
1248 Disk drive cable group
4 - standard Connects the disk drives from a second expansion
Model 95E to the base Model 951 (4-way) and first
expansion Model 95E.
1249 Disk drive cable group
5 - standard Connects the disk drives from a third expansion
Model 95E to the base Model 951 (4-way) and second
expansion Model 95E.
1250 Disk drive cable group
1 - business class Connects the disk drives to the device adapters within
Model 951, but with business class configuration,
reducing the number of installed device adapters and
I/O enclosures, while increasing the number of
storage enclosures attached to the remaining device
adapters.
Configuration rules for storage features
Use the following general configuration rules and ordering information to help you
order storage features.
You must order at least one disk enclosure pair for each base Model 941 or Model
951 that you order.
Each disk enclosure pair must contain one or a combination of the three hardware
components:
v
Regular disk drives
v Standby CoD disk drives
v
Disk enclosure fillers
If the disk enclosure contains regular or Standby CoD disk drives, the disk drive
features must be of the same capacity.
Only one disk enclosure pair feature is required on Model 951 (2-way) or when
you order an expansion Model 95E.
v
Model 951 requires a minimum of 16 disk drives (of the same type (capacity and
RPM)
Chapter 4. Storage unit physical configuration
101