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2
1
Controller A
1
2
Controller B
Right ESM
Left ESM
Figure 39. One DS4200 Express and one storage expansion enclosure — Recommended
cabling
One DS4200 Express and two storage expansion enclosures
If you are cabling one DS4200 Express Storage Subsystem and two storage
expansion enclosures, connect one storage expansion enclosure per controller drive
port as shown in Figure 40 on page 60. Figure 41 on page 60 shows that you can
also connect two expansion enclosures together behind a single controller drive
port. Although this is technically correct, use the topology as shown in Figure 40 on
page 60.
As Figure 40 on page 60 shows, when you connect additional storage expansion
enclosures, you can connect them by continuing the connection from the existing
redundant drive channel pair.
59
Chapter 3. Cabling the storage subsystem
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