2104 Model Tu3 - IBM DU3 2104 Hardware Technical Information

2104 Model TU3

The 2104 Model TU3 is a deskside SCSI disk enclosure that can be attached to any
RS/6000 or IBM
Computer System Interface (SCSI) adapters listed in "SCSI Adapters and Cables" on
page 25.
A fully configured 2104 Model TU3 looks like this:
Figure 3. 2104 Model TU3 from the Front (Left) and Back (Right)
At the front of a 2104 Model TU3 are 14 device slots 1 . In a fully configured 2104
Model TU3, each slot contains a SCSI disk drive module. If a 2104 Model TU3 is not
fully configured, each slot that does not contain a SCSI disk drive module must contain
a dummy module.
Note: At least one SCSI disk drive module must be present in each 2104 Model TU3.
Each disk drive module connects to a backplane that is mounted vertically about
halfway between the front and back of the 2104 Model TU3.
The 14 device slots are split into two groups of seven slots. Between the two groups of
slots, there is a SCSI bus bridge card 2 . The SCSI bus bridge card assigns the disk
drive modules to a SCSI bus, in accordance with the setting of the SCSI bus split
switch on the switch card.
On the back of the backplane are connectors for two fan-and-power-supply
assemblies 3 , two SCSI interface cards 4 , and a switch card 5 .
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2104 Models DU3 and TU3 Hardware Technical Information
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