SL ± Slave
CS ± Cable Select
Each of the two IDE cables (primary and secondary) normally has two connectors for attaching two IDE devices (master and slave). The C: drive must be on the primary IDE cable, and the tape drive must be on the secondary IDE cable. When choosing your con®guration, remember that two devices on the same IDE cable cannot be accessed at the same time. Performance is increased if you can avoid using both devices that are on the same IDE cable at the same time. A device will lock out another device on the same IDE cable until the operation is complete. Assuming that there are only two supported IDE devices, hard disks and tape drives, and that there can only be one tape drive and a maximum of two hard disks, the recommended con®gurations are:
Con®guration 1
Master on primary IDE:
C: drive
Slave on primary IDE: none
Master on secondary IDE: tape drive
Slave on secondary IDE: none
In the con®guration above, you must con®gure the tape drive as the master (MA) by placing a jumper over vertical pins 5 and 6. There is no contention for the devices.
Con®guration 2
Master on primary IDE:
C: drive
Slave on primary IDE:
D: drive
Master on secondary IDE: tape drive
Slave on secondary IDE: none
In the con®guration above, you must con®gure the tape drive as the master (MA) by placing a jumper over vertical pins 5 and 6. The tape drive does not contend with other devices. The C: drive does contend with the D: drive. If a ®le access to one hard disk is in progress, a ®le access to the other hard disk must wait until the ®rst access is complete before starting the ®le access to the second hard disk.
This con®guration may be best when you have two hard disks and you have a need to run the tape drive while other applications are actively accessing the D: drive. There is no contention between the tape drive and the hard disks.
Con®guration 3
4
