Intel S875WP1 Product Guide - Page 22
IDE Interfaces, SCSI Hard Drive Activity LED Connector - driver
UPC - 735858161381
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IDE Interfaces The ICH5-R IDE controller has two independent bus-mastering IDE interfaces that can be independently enabled. The interface handles the exchange of information between the processor and peripheral devices like hard disks and CD-ROM drives. The IDE interfaces supports: • Up to four IDE devices (such as hard drives) • ATAPI devices (such as CD-ROM drives) • Laser servo (LS-120) drives • PIO Mode devices • Ultra DMA-33: DMA protocol on IDE bus supporting host and target throttling and transfer rates of up to 33 MB/sec. • ATA-100/66: DMA protocol on IDE bus supporting host and target throttling and transfer rates of up to 100 MB/sec. The ATA-100/66 protocol is similar to Ultra DMA and is device driver compatible. ✏ NOTE ATA-100/66 is a faster timing and requires a specialized cable to reduce reflections, noise, and inductive coupling. The IDE interfaces also support ATAPI devices (such as CD-ROM drives) and ATA devices using the transfer modes. The BIOS supports Logical Block Addressing (LBA) and Extended Cylinder Head Sector (ECHS) translation modes. The drive reports the transfer rate and translation mode to the BIOS. The S875WP1-E server board supports Laser Servo (LS-120) diskette technology through the IDE interfaces. An LS-120 drive can be configured as a boot device by setting the BIOS Setup program's Boot menu to one of the following: • ARMD-FDD (ATAPI removable media device - floppy disk drive) • ARMD-HDD (ATAPI removable media device - hard disk drive) SCSI Hard Drive Activity LED Connector The SCSI hard drive activity LED connector is a 1 x 2-pin connector that allows an add-in SCSI controller to use the same LED as the onboard IDE controller. For proper operation, this connector should be wired to the LED output of the add-in SCSI controller. The LED indicates when data is being read from, or written to, both the add-in SCSI controller and the IDE controller. 22 Intel Server Board S875WP1-E Product Guide