Hardware User Guide

9 12Gb/s Intel® RAID Controllers User Guide
Note: The number of devices varies depending on the Intel
®
RAID Controller
product. Check the Intel website, http://www.intel.com, for specific details
about your product.
• They support wide ports that consist of two, three, or four PHYs within a single
quad port.
• They support narrow ports consisting of a single PHY.
• They transfer data by using SCSI information units.
SAS Array Limitations
This section describes the array limitations of the 12Gb/s Intel
®
RAID Controllers. These
limitations include the number of drives supported per controller, the maximum number
of drives per controller, and the maximum number of virtual drives allowed per controller.
The following table lists the array limitations for the 12Gb/s Intel
®
RAID Controllers.
Table 2. 12Gb/s Intel
®
RAID Controller Array Limitations
The maximum numbers in the previous table depend on how many physical devices you
have connected to the RAID controller. For example, the maximum number of drive
groups is equal to the number of drives that are supported by the controller. Thus, for the
Intel
®
RAID Controller RS3DC0x0, the maximum number of drive groups per controller
is 240, which is based on the maximum number of physical devices that you can connect.
In addition, the maximum number of hot spares per controller is equal to the maximum
number of drives per controller.
Although you can have up to 16 virtual drives per drive group, and up to 128 drive groups
on most of the controllers, a limit of 64 virtual drives exists on those controllers.
Specification RS3WC080/RMS3HC080
RS3DC040/RS3DC080/
RS3MC044/RS3SC008/
RMS3CC080
Maximum virtual drives per controller 32 64
Maximum drive groups per controller 32 128
Maximum virtual drives per drive group 16 16
Maximum drives per drive group 32 32
Maximum drives per controller 64 (32 configurable drives) 240
Maximum hot spares per controller 32 240
Maximum spans per virtual drive 8 8
Maximum enclosures 2 16 per port