IBM System x3850 X5 32
The RAID controllers listed in the following table are supported with external expansion enclosures.
Table 23. RAID controllers for external storage expansion enclosures
Part number Feature
code
Description Maximum
supported
46M0830 0094 ServeRAID M5025 SAS/SATA Controller 2
46M0930 5106 ServeRAID M5000 Series Advance Feature Key† 1 per one M5025
81Y4426 A10C ServeRAID M5000 Series Performance Accelerator Key† 1 per one M5025
† Only one key is supported in each controller, either the Advance Feature Key or the Performance Accelerator Key.
The ServeRAID M5025 SAS/SATA Controller has the following specifications:
Two Mini-SAS external connectors
Supports RAID levels 0, 1, 5, 10, and 50
Supports RAID 6 and 60 with the optional M5000 Advanced Feature Key
Performance optimization for SSD drives with optional M5000 Series Performance Accelerator Key
6 Gbps throughput per port
PCI Express 2.0 x8 host interface
Based on the LSI SAS2108 6 Gbps ROC controller
512 MB of onboard cache
Intelligent Li-Ion-based battery backup unit with up to 48 hours of data retention
Supports connectivity to the EXP3000, EXP2512, and EXP2524 storage expansion enclosures
For more information, see the
ServeRAID M5025 SAS/SATA Controller for IBM System x
at-a-glance
guide, TIPS0739, at: 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 24. 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
* Note: The EXP3000 and EXP2500 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 every consecutive EXP unit is connected to the
previous one by one cable.
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