Intel SR2520SA, User Manual

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16 Intel
®
Server System SR2520SA User’s Guide
SAS
In addition to the SATA features described above, the Intel
®
Server System
SR2520SAXS/SR2520SAXSR also has a dual-mode 4-port Serial Attached SCSI (SAS)
controller that supports both SAS and SATA hard disk drives. This controller is capable of
data transfer rates of up to 3.0 Gbps per port.The SAS controller (in RAID mode) supports
eight physical drives and eight logical arrays. The SAS controller (in native mode)
supports up to 120 physical drives when expanders are used.
The BIOS Setup utility includes options on the Advanced | Mass Storage setup page to
enable or disable the SAS option ROM and the SAS controller. Both of these options must
be enabled to use RAID.
•
When the SAS controller is enabled, the two black SATA ports on the server board
continue to function as SATA ports. The four blue ports can be used as either SAS or
SATA ports. When the SAS controller is disabled in the BIOS Setup utility, only the
two black SATA ports will be available.
•
When the SAS option ROM is enabled in the BIOS Setup utility, Intel
®
Embedded
Server RAID Technology II is available. This enables SAS RAID modes 0, 1, or 10
for the four blue ports on the server board. The SAS controller can mix SAS and
SATA drives.
If the SAS option ROM is disabled in the BIOS Setup utility, but the SAS controller is
enabled, the four blue ports on the server board continue to function as either SAS or
SATA ports and the two black ports on the server board continue to function as SATA-
only ports. However, RAID support is not available unless enabled in the BIOS for either
SATA or SAS.
SAS server boards can use either or both of the SAS and SATA controllers. Either one or
two Intel
®
RAID Activation Keys AXXRAKSW5 can be installed, one for the SAS
controller and/or one for the SATA controller. The RAID controllers have separate
configuration utilities available at boot, but they share the Intel
®
RAID Web Console 2
management utility.
Both SAS and SATA controllers support SGPIO enclosure management. Two SGPIO
connectors are available on SAS models of the server board, one for the SAS controller
and one for the SATA controller.
If RAID 5 is desired, the optional Intel
®
RAID Activation Key AXXRAKSW5 (available
post-release) can be installed. To enable RAID 5, this activation key is placed on the
SAS_Key connector that is located at the left side of the server board. For information on
how to install the Intel
®
RAID Activation Key AXXRAKSW5 accessory to enable RAID
5, see the documentation that is included with the accessory kit.
Notes: For assistance in navigating through the BIOS Setup utility, see the Intel
®
Server Board
S5000VSA Technical Product Specification.
For information on RAID configuration through the BIOS console and Intel
®
RAID Web
Console 2, see the RAID Software Guide.