Appendix C Appendix C - Ultra Ata Devices; Ultra Ata Jumpers; Ultra Ata Cables; Drive Installation Guidelines - HP Xw8400 - Workstation - 4 GB RAM Technical Reference Manual

C Appendix C — Ultra ATA devices

Ultra ATA jumpers

NOTE: This system supports a mixed configuration of UATA/IDE optical drives, and SAS and SATA
hard drives. While HP supports the presence of SCSI and IDE hard drives, it does not ship any
configurations using those drives.
Ultra ATA drives are configured with jumper settings. Factory-installed drives ship with the jumpers
preset to the cable-select mode; therefore, no jumper setting changes are required on factory
preinstalled, replacement, or option drives. With cable-select, the drive is configured as either Master
(Drive/Device 0) or Slave (Drive/Device 1) by its physical attachment to the cable.
If you purchase a third-party hard drive, refer to the documentation included with the drive kit to ensure
proper cable installation and configuration.
NOTE: All drives on a controller channel must have their jumpers either in the cable-select mode or
have the individual drive jumper installed on the appropriate Master (Drive/Device 0) or Slave (Drive/
Device 1) position.

Ultra ATA cables

When installing a second device on either the primary or secondary controller, you must use an industry
standard 80-conductor Ultra ATA cable for optimal performance. These cables have a maximum length
of 18 inches and a maximum distance of six inches between the two devices for a two-drive cable.
Drives operating at speeds faster than those of the Ultra ATA-33 devices require industry-standard 40-
pin, 80-conductor cables to maintain the highest data transfer rates possible with the improved
technology.
When using Ultra ATA-133, -100, -66, and -33 drives in the same system, each drive will operate at its
appropriate data transfer rate.

Drive installation guidelines

Most workstation system boards have two ATA (IDE) controller channels with a dedicated connector for
each controller. One controller is designated as the primary and the other as the secondary controller.
Each of the two controllers can have up to two devices attached to it. Each workstation system might
therefore have a maximum of four ATA/ATAPI drives. All drives are connected to these controllers using
an industry-standard, 80-conductor cable.
NOTE: The industry standard, 1.44-MB diskette drive has its own separate channel and is not included
as a part of the maximum four drives.
Any drive attached to a controller must have a drive designation. If only a single drive is connected to
a controller and its jumper is in the cable-select position, it is designated as the Master Drive (Drive/
Device 0) by its attachment to the Drive/Device 0 cable position. If two cable-selected drives are
connected to a single controller, one will be designated by its attachment to the cable as the Master
(Drive/Device 0) and the other as Slave (Drive/Device 1).
ENWW Ultra ATA jumpers 143