8
12Gb/s Intel® RAID Controllers User Guide
Table 2. 12Gb/s Intel
®
RAID Controller Array Limitations
A.
The number assumes one storage enclosure processor (SEP) per enclosure.
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.
These RAID controllers support 64-bit logical block addressing (LBA), which makes it
possible to connect a large number of drives to the RAID controller, directly and through
expanders. However, the actual number of drives that you can attach depends on the limits
listed in this table rather than by actual RAID volume capacity.
SATA III Features
The following list describes the SATA III features of the RAID controllers:
•
They support SATA III data transfers of 6Gb/s for LSISAS3108-based controllers.
•
They support STP data transfers of 3Gb/s.
•
They provide a serial, point-to-point storage interface.
•
They simplify cabling between devices.
•
They eliminate the master-slave construction used in parallel ATA.
•
They permit addressing of multiple SATA targets through an expander.
Specification
Intel
®
RAID Controller
RS3WC080
Intel
®
RAID Controller
RS3DC040/RS3DC080
Maximum virtual drives per controller
64
64
Maximum drive groups per controller
128
128
Maximum virtual drives per drive group
16
16
Maximum drives per drive group
32
32
Maximum drives per controller
240
240
Maximum hot spares per controller
240
240
Maximum spans per virtual drive
8
8
Maximum enclosures per port
A
10
10
Number of port connectors
5
5
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