IBM Redbooks ServeRAID-MR10i, User Manual

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1-10 Overview
1.6.1 SAS Features
The following list describes the SAS features of the ServeRAID-MR10i
controller:
•
Provides eight fully independent PHYs
•
Supports 3.0 Gbit/s SAS data transfers per PHY
•
Supports SSP to enable communication with other SAS devices
•
Supports SMP to communicate topology management information
•
Provides a serial, point-to-point, enterprise-level storage interface
•
Simplifies cabling between devices
•
Provides a scalable interface that supports up to 122 devices
through the use of expanders
•
Supports wide ports consisting of 2, 3, or 4 PHYs within a single
quad port
•
Supports narrow ports consisting of a single PHY
•
Transfers data using SCSI information units
1.6.2 SAS Array Limitations
This section describes the array limitations of the ServeRAID-MR10i
controller. These include limitations such as the number of physical disks
supported, the maximum number of disks per controller, and the
maximum number of virtual disks allowed per controller.
Table 1.2 lists the array limitations for the controller.
Table 1.2 ServeRAID-MR10i Controller Array Limitations
Specification
ServeRAID-MR10i
Controller
Maximum virtual disks per controller 64
Maximum arrays per controller 128
Maximum virtual disks per array 16
Maximum drives per array 16
Maximum drives per controller 16
Maximum hot spares 16