IBM e Server i Series Manual page 48

Note for 5294 users: The 5294 consists of two independent expansion units:
Note: If you are installing feature 4331 1.65 GB Read Cache, solid-state disk units,
Refer to the label on the inside of the front cover and install the disk units in this
order:
__ 1. First fill all the disk unit positions that are controlled by the first high-speed
__ 2. Your expansion unit requires a second high-speed disk-unit controller before
__ 3. Your expansion unit requires a third high-speed disk-unit controller before
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43xx Disk Unit, 71xx Disk Expansion Unit, 71xx Disk Unit Enclosure V5R3
5294–001 and 5294–002. Installation rules and procedures
apply to each expansion unit independently.
you can only install them in position one of your disk unit enclosures. You
can install three of these features (if you have three disk unit controllers) in
the expansion unit, for example, in positions D31, D01, and D06.
disk-unit controller.
__ a. Fill the slot 1's: D31, D36, D46
__ b. Fill the slot 2's D32, D37, D47
__ c. Fill the slot 3's: D33, D38, D48
__ d. Fill the slot 4's: D34, D39, D49
__ e. Fill the slot 5's: D35, D40, D50
you can install disk units into the following positions. Contact IBM or an
authorized dealer if your expansion unit does not have a second high-speed
disk-unit controller (IOA Card 2).
Next fill the slots in (IOA Card 2) this sequence:
__ a. Fill the slot 1's: D01, D11, D21
__ b. Fill the slot 2's: D02, D12, D22
__ c. Fill the slot 3's: D03, D13, D23
__ d. Fill the slot 4's: D04, D14, D24
__ e. Fill the slot 5's: D05, D15, D25
you can install disk units into the following positions. Contact IBM or an
authorized dealer if your expansion unit does not have a third high-speed
disk-unit controller (IOA Card 3).
Last fill the slots in (IOA Card 3) this sequence:
__ a. Fill the slot 1's: D06, D16, D26
__ b. Fill the slot 2's: D07, D17, D27
__ c. Fill the slot 3's: D08, D18, D28
__ d. Fill the slot 4's: D09, D19, D29
__ e. Fill the slot 5's: D10, D20, D30