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4. Connect the OUT port (2) on the right ESM in the second EXP100 (4)to
port 2 of drive channel 2 on the DS4700 Express.
One DS4700 Express and three or more EXP100 storage
expansion enclosures
To connect three or more storage expansion enclosures to a DS4700 Express
Storage Subsystem, alternately connect a storage expansion enclosure to one of
the drive ports of the dual-ported drive channel then connect to the other port until
all of the storage expansion enclosures are attached. Figure 63 shows the
recommended cabling scheme for one DS4700 Express Storage Subsystem and
three EXP100 storage expansion enclosures behind both ports of a dual-ported
drive channel.
Perform the following steps to create the recommended cabling scheme shown in
Figure 63:
1. Connect the OUT port (2) on the left ESM in the first EXP100 (3) to the IN
port (1) on the left ESM in the third EXP100 (5).
2. Connect the IN port (1) on the right ESM in the third EXP100 (5)tothe
OUT port (2) on the right ESM in the first EXP100 (3).
3. Connect the IN port (1) on the left ESM in the first EXP100 (3)toport2of
drive channel 1 on the DS4700 Express.
4. Connect port 1 of drive channel 2 on the DS4700 Express to the OUT port (2)
on the right ESM in the third EXP100 (5).
5. Connect the IN port (1) on the left ESM in the second EXP100 (4) to port 1
of drive channel 1 on the DS4700 Express.
6. Connect the OUT port (2) on the right ESM in the second EXP100 (4)to
port 2 of drive channel 2 on the DS4700 Express.
Figure 64 on page 83 shows the recommended cabling scheme for one DS4700
Express Storage Subsystem and four EXP100s behind both ports of a dual-ported
drive channel.
ds470052
2
1
2
1
2
1
3
4
5
DS4700
Figure 63. One DS4700 Express and three EXP100 storage expansion enclosures behind a
pair of DS4700 drive ports
82 IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide