Combining 2U And 5U Expansion Enclosures; Examples Of Supported Sas Chain Combinations - IBM SAN Volume Controller 2145-SV1 Hardware Installation Manual

Combining 2U and 5U expansion enclosures

About this task
You can combine 2145-24F , 2145-12F, and 2145-92F enclosures in an 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:
• 2145-92F enclosures have a chain weight of 2.5
• 2145-24F and 2145-12F enclosures have a chain weight of 1.
Example
Table 11. Examples of supported SAS chain combinations
Number of 2145-12F
2
2
0
Number of 2145-24F
0
3
7
Chapter 3. Installing an optional 2U SAS expansion enclosure 39
Number of 2145-92F
3
2
1
Combined chain weight
9.5
10
9.5