Datasheet
IBM System x3550 M4 42
External disk storage expansion
The server supports attachment to external storage expansion enclosures, such as the EXP2500 series,
by using the ServeRAID M5120 SAS/SATA Controller. The server can also be attached to supported
external storage systems, such as the IBM System Storage® DS3500 series, using the supported HBAs.
Table 22. RAID controllers and options for external disk storage expansion
Part number Feature
code
Description Maximum
supported
Standard models
where used
81Y4478** A1WX ServeRAID M5120 SAS/SATA Controller 2** -
Hardware upgrades for the M5120
81Y4508 A22E ServeRAID M5100 Series Battery Kit 1* -
81Y4484 A1J3 ServeRAID M5100 Series 512MB Cache/RAID 5
Upgrade
1 -
81Y4487 A1J4 ServeRAID M5100 Series 512MB Flash/RAID 5
Upgrade
1 -
81Y4559 A1WY ServeRAID M5100 Series 1GB Flash/RAID 5 Upgrade 1 -
Feature on Demand upgrades for the M5120
81Y4544 A1X2 ServeRAID M5100 Series Zero Cache/RAID 5
Upgrade
1 -
90Y4318 A2MD ServeRAID M5100 Series SSD Caching Enabler 1 -
90Y4273 A2MC ServeRAID M5100 Series SSD Performance Key 1 -
81Y4546 A1X3 ServeRAID M5100 Series RAID 6 Upgrade 1† -
* The ServeRAID M5100 Series Battery Kit (81Y4508) is only supported with ServeRAID M5100 Series 512MB
Cache/RAID 5 Upgrade (81Y4484).
† The ServeRAID M5100 Series RAID 6 Upgrade (81Y4546) requires 512 MB or 1 GB cache upgrades.
** The ServeRAID M5120 SAS/SATA Controller requires the x3550 M4 Thermal Solution Kit, 00Y7117 or the second
processor (with additional system fans).
The ServeRAID M5120 SAS/SATA Controller has the following specifications:
Eight external 6 Gbps SAS/SATA portscool
Two external x4 mini-SAS connectors (SFF-8088)
Supports RAID levels 0, 1, and 10
Supports RAID levels 5 and 50 with optional M5100 Series RAID 5 upgrades
Supports RAID 6 and 60 with the optional M5100 Series RAID 6 Upgrade
Supports 512 MB battery-backed cache or 512 MB or 1 GB flash-backed cache
Up to 6 Gbps throughput per port
PCIe x8 Gen 3 host interface
Based on the LSI SAS2208 6 Gbps ROC controller
Supports connectivity to the EXP2512 and EXP2524 storage expansion enclosures
For more information, see the IBM Redbooks® Product Guide
ServeRAID M5120 SAS/SATA Controller
for IBM System x
at:
http://www.redbooks.ibm.com/abstracts/tips0858.html?Open