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Figure 48. One DS4200 Express and three EXP420 storage expansion enclosures behind a
pair of DS4200 Express drive ports
Perform the following steps to create the recommended cabling scheme shown in
Figure 48:
1. Connect port 1A on the left ESM in the first EXP420 ( 2 ) to port 1B ( 1 ) on
2. Connect port 1A on the right ESM in the third EXP420 ( 4 ) to port 1B ( 1 ) on
3. Connect port 1B ( 1 ) on the left ESM in the first EXP420 ( 2 ) to port 2 of
4. Connect port 1 of drive channel 2 on the DS4200 Express to port 1B ( 1 ) on
5. Connect port 1B ( 1 ) on the left ESM in the second EXP420 ( 3 ) to port 1 of
6. Connect port 1B ( 1 ) on the right ESM in the second EXP420 ( 3 ) to port 2 of
Figure 49 on page 67 shows the recommended cabling scheme for one DS4200
Express Storage Subsystem and four EXP420 storage expansion enclosures
behind both ports of a dual-ported drive channel.
66
IBM System Storage DS4200 Express Storage Subsystem: Installation, User's and Maintenance Guide
1
2
1
4
the left ESM in the third EXP420 ( 4 ).
the right ESM in the first EXP420 ( 2 ).
drive channel 1 on the DS4200 Express.
the right ESM in the third EXP420 ( 4 ).
drive channel 1 on the DS4200 Express.
drive channel 2 on the DS4200 Express.
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1
1
1
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