Server User Manual

Server Board Features 21
Device IDs (IDSEL)
Each device under the PCI hub bridge has its IDSEL signal connected to one bit of AD[31:16],
which acts as a chip select on the PCI bus segment in configuration cycles. This determines a
unique PCI device ID value for use in configuration cycles. The following table shows each
IDSEL value for the PCI bus devices and the corresponding device description.
Table 5. PCI Bus Configuration IDs
IDSEL Value Device
16 PCI slot 1 (closest to AGP connector)
17 PCI slot 2 (middle slot)
18 PCI slot 3 (closest to left edge of board)
22 ATI Rage XL Video Controller
23 Promise Technology PDC20319 ATA-100 controller
Data Storage
Serial ATA (SATA)
The server board S875WP1-E supports Serial ATA devices using the ICH5-R controller. The
ICH-5 provides the following Serial ATA support:
• 150 MB/sec transfer rate
• Up to two SATA devices on the server board S875WP1-E. These are indicated by the
connectors labeled SATA-B1 and SATA-B2 on the server board.
• Support for RAID 0 (Striping) and 1 (Mirroring) is planned, but not currently available.
The server board S875WP1LX supports an additional four Serial ATA devices using the Promise
Technology PDC20319 host controller. These are indicated by the connectors labeled from left to
right on the server board: SATA-A4, SATA-A2, SATA-A3, and SATA-A1. The Promise
PDC20319 controller provides the following Serial ATA support:
• 150 MB/sec transfer rate
• Support for RAID 0 (Striping), 1 (Mirroring), and 10 (Mirroring and Striping).
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NOTES
Although the Promise Technology PDC20319 Serial ATA controller on this
product supports up to 150 MB/sec transfer rate, the PCI bus limits some
SATA devices are limited to a maximum of 133 MB/sec.
For instructions on installing and configuring Serial ATA RAID on the 4-port
Promise Controller that is available on the server board S875WP1LX, please see
http://support.intel.com/support/motherboards/server/s875wp1e/sata-install.htm