Lenovo System x3550 M5 Product Manual page 38

The ServeRAID M5225 SAS/SATA Controller has the following specifications:
Eight external 12 Gbps SAS/SATA ports
Supports 12, 6, and 3 Gbps SAS and 6 and 3 Gbps SATA data transfer rates
Two external x4 mini-SAS HD connectors (SFF-8644)
Supports 2 GB flash-backed cache (standard)
Supports RAID levels 0, 1, 5, 10, and 50 (standard)
Supports RAID 6 and 60 with the optional M5200 Series RAID 6 Upgrade
Supports optional M5200 Series Performance Accelerator and SSD Caching upgrades
PCIe x8 Gen 3 host interface
Based on the LSI SAS3108 12 Gbps ROC controller
Supports connectivity to the EXP2512 and EXP2524 storage expansion enclosures
For more information about the ServeRAID M5225, see the Lenovo Press Product Guide at
http://lenovopress.com/tips1258
The ServeRAID M5225 SAS/SATA Controller supports connectivity to the external expansion enclosures
listed in the following table. Up to nine expansion enclosures can be daisy-chained per one M5225
external port. For better performance, distribute expansion enclosures evenly across both M5225 ports.
Table 26. External expansion enclosures
Part number Description
70F0 / 70F1 Lenovo ThinkServer SA120
610012X EXP2512 Storage Enclosure
610024X EXP2524 Storage Enclosure
Lenovo ThinkServer SA120 support
For details about supported drives and cables for the Lenovo ThinkServer SA120, see the Lenovo Press
Product Guide:
http://lenovopress.com/tips1234
EXP2512 and EXP2524 support
The external SAS cables listed in the following table support connectivity between external expansion
enclosures and the ServeRAID M5225 SAS/SATA Controller.
Table 27. External SAS cables for external storage expansion enclosures
Part number Description
Server to Expansion enclosure connectivity (Mini-SAS HD x4 to Mini-SAS x4)
00MJ162 0.6m SAS Cable (mSAS HD to mSAS)
00MJ163 1.5m SAS Cable (mSAS HD to mSAS)
00MJ166 3m SAS Cable (mSAS HD to mSAS)
Expansion enclosure to Expansion enclosure connectivity (Mini-SAS x4 to Mini-SAS x4)
39R6529 1 m SAS Cable
39R6531 3 m SAS Cable
System x3550 M5
Maximum quantity supported per
one M5225
8
17
9
Maximum quantity supported per
one enclosure
1
1
1
1
1
38