IBM System x3550 M4
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The ServeRAID M5120 SAS/SATA Controller supports connectivity to the IBM System Storage external
expansion enclosures 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 21. IBM System Storage external expansion enclosures
Part
number
Description
Maximum quantity
supported per one M5120
174712X
IBM System Storage EXP2512 Express
18
174724X
IBM System Storage EXP2524 Express
9
The external SAS cables listed in the following table support connectivity between external expansion
enclosures and the ServeRAID M5120 SAS/SATA Controller.
Table 22. External SAS cables for external storage expansion enclosures
Part
number
Description
Maximum quantity
supported per one enclosure
39R6531
IBM 3 m SAS Cable
1
39R6529
IBM 1 m SAS Cable
1
The following table lists the drives supported by EXP2512 external expansion enclosures.
Table 23. Drive options for EXP2512 external expansion enclosures
Part
number
Description
Maximum quantity supported
per one enclosure
3.5-inch NL SAS HS HDDs
49Y1903
1TB 7,200 rpm 6Gb SAS NL 3.5" HDD
12
49Y1902
2TB 7,200 rpm 6Gb SAS NL 3.5" HDD
12
90Y8720
3TB 7,200 rpm 6Gb SAS NL 3.5" HDD
12
3.5-inch SAS HS HDDs
49Y1899
300GB 15,000 rpm 6Gb SAS 3.5" HDD
12
49Y1900
450GB 15,000 rpm 6Gb SAS 3.5" HDD
12
49Y1901
600GB 15,000 rpm 6Gb SAS 3.5" HDD
12
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