IBM System x3550 M3 31
The RAID controllers listed in the following table are supported and connect to external expansion
enclosures.
Table 19. RAID controllers for external storage expansion enclosures
Part number Feature
code
Description Maximum
supported
46M0830 0094 ServeRAID M5025 SAS/SATA Controller 1
46M0930 5106 ServeRAID M5000 Series Advance Feature Key* 1 per one M5025
81Y4426 A10C ServeRAID M5000 Series Performance Accelerator Key* 1 per one M5025
* Note: The Advanced Feature Key and Performance Accelerator Key cannot be used at the same time. Only one
key can be installed onto the RAID controller.
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 about the M5025, see the
ServeRAID M5025 SAS/SATA Controller for IBM System
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Product Guide: http://www.redbooks.ibm.com/abstracts/tips0739.html?Open