IBM ServeRAID-MR10is, User Manual

Page: 29 / 94

Summary of the ServeRAID-MR10is SAS/SATA Controller Characteristics 1-13
•
Provides high throughput and low CPU utilization to offload the host
processor
1.6.5 Usability Features
The following list describes the usability features of the ServeRAID-
MR10is controller:
•
Simplifies cabling with point-to-point, serial architecture
•
Supports smaller, thinner cables that do not restrict airflow
•
Provides drive spin-up sequencing control
•
Provides up to two LED signals for each PHY to indicate link activity
and faults
•
Provides an I
2
C interface for enclosure management
•
Supports the internal SAS Sideband signal SFF-8485 (SGPIO)
interface
1.6.6 Flexibility Features
These features increase the flexibility of the ServeRAID-MR10is
controller:
•
Supports a Flash ROM interface, a nonvolatile static RAM
(NVSRAM) interface, and a pipelined synchronous burst SRAM
(PSBRAM) interface
•
Offers a flexible programming interface to tune I/O performance
•
Allows mixed connections to SAS targets or SATA II targets
•
Leverages compatible connectors for SAS connectors and SATA II
connections
•
Allows grouping of up to four PHYs in a single quad port to form a
wide port
•
Allows programming of the World Wide Name
1.6.7 Drive Roaming
Drive roaming occurs when the physical drives are changed to different
ports on the same controller. When the drives are placed on different