IBM DU3 2104, Техническая информация о аппаратных средствах

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2104 Model DU3
The 2104 Model DU3 is a rack-mounted SCSI disk enclosure that can be attached to
any RS/6000 or IBM
™
server
TM
™
pSeries computer that provides support for any of
the Small Computer System Interface (SCSI) adapters listed in “SCSI Adapters and
Cables” on page 25.
A fully configured 2104 Model DU3 looks like this:
At the front of a 2104 Model DU3 there are 14 device slots
1
. In a fully configured
2104 Model DU3, each slot contains a SCSI disk drive module. If a 2104 Model DU3 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 DU3.
Each disk drive module connects to a backplane that is mounted vertically about
halfway between the front and back of the 2104 Model DU3.
The 14 device slots are divided 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.
Figure 2. 2104 Model DU3 from the Front (Top) and Back (Bottom)
2
2104 Models DU3 and TU3 Hardware Technical Information