IBM Redbooks ServeRAID-MR10i, User Manual

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Technical Specifications 3-5
3.3.2 Array Performance Features
Table 3.4 shows the array performance features of the ServeRAID-
MR10i controller.
Type of Drives
Supported
Serial Attached SCSI (SAS) and Serial ATA II (SATA II)
PCI Express Bus
Data Transfer Rate
•
Up to 2.5 Gbits/s per lane
•
x8 lane width (with support for downshifting for
motherboards with x1 and x4 connections)
•
Up to 2 Gbytes/s per direction for SAS x8 cards
(4 Gbytes/s total)
Serial Port 3-pin RS232-compatible connector (for manufacturing
use only)
SAS Controller(s) One LSISAS1068 Single SAS controller
SAS Bus Speed 3 Gbits/s
SAS Ports Two SAS connectors with four SAS ports each
Cache Configuration Integrated 128 Mbyte - 256 Mbyte Double Data Rate II
667 MHz SDRAM intelligent battery backup unit
Size of Flash ROM
for Firmware
4 Mbytes
Nonvolatile Random
Access Memory
(NVRAM)
32 Kbytes for storing RAID configuration
Table 3.3 ServeRAID-MR10i Controller Specifications (Cont.)
Specification ServeRAID-MR10i Controller
Table 3.4 Array Performance Features
Specification ServeRAID-MR10i Controller
PCI Express Host Data Transfer
Rate
2.5 Gbits/s per lane
Drive Data Transfer Rate 3.0 Gbits/s per lane
Maximum Scatter/Gathers 26 elements
Maximum Size of I/O Requests 6.4 Mbytes in 64 Kbyte stripes
Maximum Queue Tags per Drive As many as the drive can accept