IBM DS5100 Installation, User's, And Maintenance Manual page 96

Figure 39. Example of cascading EXP5060s in non-trunking cabling scheme
EXP5060 and EXP5000/EXP810 storage expansion enclosures can also be
intermixed in the same DS5100/DS5300 storage subsystem. Figure 40 on page 65,
Figure 41 on page 66, Figure 42 on page 67, and Figure 43 on page 68 show
examples of the intermixing the EXP5060 and EXP5000 in the same controller drive
ports, the same controller drive channel, and a different controller drive channel.
The maximum number of EXP5000 that can be connected in the same drive port or
drive channel with the EXP5060 is 3. The only exception to this is when the Attach
up to eight EXP5060 feature pack is activated. Once the DS5100/DS5300 is
activated with this feature pack, the EXP5060 is the only storage expansion
enclosures that can be connected to the DS5100/DS5300 storage subsystem.
Figure 42 on page 67 and Figure 43 on page 68 show the recommended cabling
configuration when intermixing the EXP5060 and EXP5000 in the same storage
subsystem configuration, which is on separate drive channel ports or drive
channels.
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IBM System Storage DS5100 and DS5300 Storage Subsystem: Installation, User's, and Maintenance Guide
Ch1 Ch2 Ch3 Ch4
P8 P7 P6 P5
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ESM B
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Ch5 Ch6 Ch7 Ch8
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2A 2B
ESM B