ULTRA ATA JUMPERS 149
Appendix C
Appendix C Ultra ATA Devices
NOTE This system supports a mixed configuration of UATA/IDE, SCSI, and SATA hard drives. While HP
supports the presence of IDE drives, it does not ship any configurations using those drives.
Ultra ATA Jumpers
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 higher data transfer rates possible with the improved technology.
When using Ultra ATA-133, -100, -66, and slower -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.
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