One Ds4700 Express And Two Storage Expansion Enclosure - Not Recommended Cabling; One Ds4700 Express And Two Storage Expansion Enclosure - Recommended Cabling - IBM DS4700 Installation, User's, And Maintenance Manual

redundant drive channel pair.
2
1
Controller A
Left ESM
Left ESM
Figure 52. One DS4700 Express and two storage expansion enclosure — Not recommended
cabling
As Figure 53 shows, when you connect additional storage expansion enclosures,
you can connect them by using the additional port of the drive channel.
2
1
Controller A
Left ESM
Left ESM
Figure 53. One DS4700 Express and two storage expansion enclosure — Recommended
cabling
1 2
Controller B
Right ESM
Right ESM
ds470044
1 2
Controller B
Right ESM
Right ESM
ds470045
Chapter 3. Cabling the storage subsystem
73