IBM System x3650 M4 BD Product Manual page 30

The ServeRAID M5120 SAS/SATA Controller has the following specifications:
Eight external 6 Gbps SAS/SATA ports

Up to 6 Gbps throughput per port

Two external x4 mini-SAS connectors (SFF-8088)

Supports RAID 0, 1, and 10

Supports RAID 5 and 50 with optional M5100 Series RAID 5 upgrades

Supports RAID 6 and 60 with the optional M5100 Series RAID 6 upgrade

Supports 512 MB battery-backed cache or 512 MB or 1 GB flash-backed cache (cache)

PCIe 3.0 x8 host interface

Based on the LSI SAS2208 6 Gbps ROC controller

Supports connectivity to the EXP2512 and EXP2524 storage expansion enclosures

For more information, see the IBM Redbooks Product Guide ServeRAID M5120 SAS/SATA Controller for
IBM System x, TIPS0858:
http://www.redbooks.ibm.com/abstracts/tips0858.html?Open
The ServeRAID M5120 SAS/SATA Controller supports connectivity to the IBM System Storage external
expansion enclosures that are listed in the following table. Up to nine expansion enclosures can be
daisy-chained per one M5120 external port. For better performance, distribute expansion enclosures
evenly across both M5120 ports.
Table 20. IBM System Storage external expansion enclosures
Part number Description
174712X IBM System Storage EXP2512 Express
174724X IBM System Storage EXP2524 Express
The external SAS cables that are listed in the following table support connectivity between external
expansion enclosures and the ServeRAID M5120 SAS/SATA Controller.
Table 21. External SAS cables for external storage expansion enclosures
Part number Description
39R6531 IBM 3 m SAS Cable
39R6529 IBM 1 m SAS Cable
IBM System x3650 M4 BD Product Guide
Maximum quantity supported per
one M5120
18
9
Maximum quantity supported per
one enclosure
1
1
30