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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 external 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 29. External expansion enclosures
Part number Description
64111B1*
Lenovo Storage E1012 LFF Disk Expansion Single SAS IO Module, Rail Kit, 9x5 NBD
64111B2
Lenovo Storage E1012 LFF Disk Expansion Dual SAS IO Module, Rail Kit, 9x5 NBD
64111B3*
Lenovo Storage E1024 SFF Disk Expansion Single SAS IO Module, Rail Kit, 9x5 NBD
64111B4
Lenovo Storage E1024 SFF Disk Expansion Dual SAS IO Module, Rail Kit, 9x5 NBD
70F0 / 70F1** Lenovo ThinkServer SA120
610012X
EXP2512 Storage Enclosure
610024X
EXP2524 Storage Enclosure
* Not available for ordering in North America (United States and Canada).
** Machine Type; see the Lenovo ThinkServer SA120 Product Guide (http://lenovopress.com/tips1234) for available models.
Lenovo Storage E1012 and E1024
For details about supported drives and cables for the Lenovo Storage E1012 and E1024, see the Lenovo
Press Product Guide:
http://lenovopress.com/lp0043
Lenovo ThinkServer SA120
For details about supported drives and cables for the Lenovo ThinkServer SA120, see the Lenovo Press
Product Guide:
http://lenovopress.com/tips1234
Lenovo System x3550 M5
Max qty
supported
per one
M5225
8
8
8
8
8
17
9
36