Compaq Deskpro 2000 Compaq Deskpro 2000 Series of Personal Computers Pentium P - Page 227
Hard Drives, D - manual
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C appendix HARD DRIVES Compaq Computer Corporation uses IDE/EIDE hard disk drives that conform to two different primary/secondary implementations. These are Conner mode and ATA-compatible mode. These two modes are incompatible with one another. Device 0/Device 1 Relationship A device 0/device 1 relationship exists when there are two hard drives connected to a single port. In this situation, one drive must be designated as the device 0 (primary) drive and the other as the device 1 (secondary) drive. This designation is necessary because both drives cannot work simultaneously. Cable Select The Compaq Deskpro 2000 Series of Personal Computers use cable-select technology for identifying Device 0 (primary) and Device 1 (secondary) IDE/EIDE hard drives. Check that the jumpers on the IDE/EIDE hard drives are set properly for cable-select installation. Always check the label on the drives or check Chapter 7 of this manual when a new drive is added to verify that the jumper settings are set correctly. s Cable select may not function properly if drives other than those supported by Compaq are installed. s The second drive on a cable-select cable can be a CD-ROM drive. However, the CD-ROM drive must be installed in the device 1 position if a hard drive is installed on the same cable. Ensure that both drives are set for cable-select configuration. See Chapter 7 for more information. s If two drives are already connected to the primary IDE/EIDE controller and an additional drive is to be installed, the secondary IDE/EIDE controller must be enabled. The secondary IDE/EIDE controller can be enabled by checking this option after opening the Advanced box in the Mass Storage group of F10 Computer Setup. See Chapter 2 for more information. s When more than two drives are installed, drive performances are best when the two faster drives are connected to the primary IDE/EIDE controller and the slower drive is connected to the secondary IDE/EIDE controller. s A hard drive is installed and configured more quickly when the jumpers have been configured first. s If the new drive includes the cable-select feature, no jumper setting changes are required. Refer to the documentation supplied with the drive for instructions on using the cable select feature. If you install a third-party hard drive, you will need to purchase a jumper cable (spare part number 247568-001) from Compaq Computer Corporation. Compaq Deskpro 2000 Series of Personal Computers C-1
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