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the trunking cabling scheme, then ESM B of the same EXP5060 must also be
connected using the trunking cabling scheme.
v
There must not be more than two Fibre channel cables connecting any two
ESMs from two EXP5060s or between the ESM and the controller.
v
The two trunked Fiber channel connections between the EXP5060 ESM and the
controller must be in the same controller drive channel.
v
A given ESM must not be a member of more than two connected device pairs.
v
Intermixing enclosures with trunked and non-trunked cabling in the same storage
subsystem is supported.
v
Connect the EXP5060 and EXP5000/EXP810 storage expansion enclosures in
separate drive channels in each controller to enable drive-side trunking with the
EXP5060 storage expansion enclosure.
In addition to the general rules, following are specific rules for trunking cabling
between the DS5100/DS5300 and the EXP5060:
1. Port 1B of the EXP5060 ESM A can only be connected to an even-numbered
drive channel port in the DS5100/DS5300 controller A (port 8, 6, 4, 2) or port 1A
of the adjacent EXP5060 ESM A.
2. Port 1B of the EXP5060 ESM B can only be connected to an odd-numbered
drive channel port in the DS5100/DS5300 controller A (port 1, 3 ,5,7 ) or port 1A
of the adjacent EXP5060 ESM B.
3. Port 2B of the EXP5060 ESM A can only be connected to an odd-numbered
drive channel port in DS5100/DS5300 controller A (port 7, 5, 3, 1) or port 2A of
the adjacent EXP5060 ESM A. This controller drive port must be part of the
same drive channel of controller A as the ESM port that it is connected to in rule
1.
4. Port 2B of the EXP5060 ESM B can only be connected to an even-numbered
drive channel port in DS5100/DS5300 controller A (port 2, 4, 6, 8) or port 2A of
the adjacent EXP5060 ESM B. This controller drive port must be part of the
same drive channel of controller B as the ESM port that it is connected to in
rule 3.
5. Port 1A of EXP5060 ESM A can only be connected to port 1B of adjacent
EXP5060 ESM A.
6. Port 1A of EXP5060 ESM B can only be connected to port 1B of adjacent
EXP5060 ESM B.
7. Port 2A of EXP5060 ESM A can only be connected to port 2B of adjacent
EXP5060 ESM A
8. Port 2A of EXP5060 ESM B can only be connected to port 2B of adjacent
EXP5060 ESM B.
If the ports are not connected using the above rules, Fibre Trunk miswire and
enclosure path redundancy loss critical events will be generated. Figure 44 on page
71 shows an example of the DS5100/DS5300 subsystem that is cabled to two
EXP5060s using the trunking cabling scheme. Port P8 and P7 of controller A drive
channel 1 are used to connect to ESM A ports 1B and 2B of the EXP5060 on the
left. Similarly, ports P1 and P2 of controller B drive channel 5 are used to connect
to ESM B ports 1B and 2B of the EXP5060 on the left.
70
IBM System Storage DS5100 and DS5300 Storage Subsystem: Installation, User’s, and Maintenance Guide