IBM System x3500 M3 - Page 33

IBM System x3500 M3 33
The ServeRAID M5025 SAS/SATA Controller has the following specifications:
Two Mini-SAS external connectors
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Supports RAID levels 0, 1, 5, 10, and 50

Supports RAID 6 and 60 with the optional M5000 Advanced Feature Key
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Performance optimization for SSD drives with optional M5000 Series Performance Accelerator Key
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6 Gbps throughput per port
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PCI Express 2.0 x8 host interface
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Based on the LSI SAS2108 6 Gbps ROC controller
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512 MB of onboard cache
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Intelligent Li-Ion-based battery backup unit with up to 48 hours of data retention
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Supports connectivity to the EXP3000, EXP2512, and EXP2524 storage expansion enclosures
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For more information, see the ServeRAID M5025 SAS/SATA Controller for IBM System x Product Guide:
http://www.redbooks.ibm.com/abstracts/tips0739.html?Open
The external SAS cables listed in the following table are supported with external expansion enclosures
and M5025 RAID controllers.
Table 19. External SAS cables for external storage expansion enclosures
Part number Description Maximum quantity
supported per enclosure*
39R6531 IBM 3 m SAS Cable 1
39R6529 IBM 1 m SAS Cable 1
* The EXP3000 and EX2500 series can be chained with each other. In such a case, one cable is used to connect
first EXP25xx or EXP3000 to the RAID controller, and each consecutive EXP unit is connected to the previous one
by one cable.