IBM Storwize V7000 Gen2+ - Connecting the SAS Cables

2. If more I/O groups are configured, repeat the cabling procedure for the other
I/O groups. Each system can have a maximum of four I/O groups, with two
chains of expansion enclosures attached to each I/O group. Two chains of
expansion enclosures can be attached to each I/O group. On each SAS chain,
the systems can support up to a SAS chain weight of 10.
Combining 2U and 5U expansion enclosures
About this task
As Figure 117 shows, you can combine , 2145-12F, and 2076-92F enclosures in a
SAS chain.The limiting factor is the combined chain weight of the various
components. The maximum SAS chain weight that can be attached to a node SAS
port is 10:
v 2076-92F enclosures have a chain weight of 2.5
v and 2145-12F enclosures have a chain weight of 1.
2
1
2
1
svc01059
2
1
2
1
Figure 117. Connecting the SAS cables
124 Storwize V7000 Gen2 and Gen2+: Quick Installation Guide