IBM DS4800 - DS4800 drive cabling topologies

One DS4800 and eight storage expansion enclosures
If you are cabling one DS4800 Storage Subsystem to eight storage expansion
enclosures, Figure 52 on page 74 shows the recommended cabling scheme.
DS4800 Storage
Subsystem
DS4000 Storage
Expansion Enclosure 1
DS4000 Storage
Expansion Enclosure 2
DS4000 Storage
Expansion Enclosure 3
DS4000 Storage
Expansion Enclosure 4
4
2
1
3
4
2
1
3
Drive Channel 3
Drive Channel 4
Drive Channel 1
Drive Channel 2
Left ESM (A)
Right ESM (B)
Left ESM (A)
Right ESM (B)
Left ESM (A)
Right ESM (B)
Left ESM (A)
Right ESM (B)
Controller A
Controller B
ds48054
Figure 51. One DS4800 and four storage expansion enclosures — Recommended cabling
Chapter 3. Cabling the storage subsystem 73