User`s guide

SCSI drives

4/2 FT1200 HANDBOOK

1 First or “master” hard disk drive (HDD)

2 Slot for a second hard disk drive

3 Slot for a removable-media drive

4 Rear drive bay for two SCSI hard disk drives

Hard disk configurations

Two options are available for SCSI control; the onboard Adaptec

7895 Dual channel SCSI to PCI controller, or the AMI i960 series

431 Ultra SCSI to PCI RAID card (optional). The onboard

configuration uses two separate cables, one from each port to the front

and rear drive bays respectively The first channel (Ch A) will control

the front mounted hard drives and the optional tape drive (via a 50

pin to 68 pin converter), while the second channel (Ch B) will control

only the rear hard drive pair. When using an AMI431 RAID card, a

single SCSI cable will be employed, which will connect to all four

hard drives and the optional tape drive (again via a converter).

Hard Disk Drive types and links

The hard disk sub-system can consist of up to four IBM

DDRS-

xxxxx

(4Gb or 9Gb) or IBM

DCAS-xxxxx

(2Gb or 4Gb) 68 pin

Ultra II-Wide SCSI drives. The drive locations are as above, the

front bays will be filled first. With the onboard option, when both

buses are used, the last physical drive on each bus must be

configured to terminate the bus. When the RAID option is used,

only the very last physical drive on the cable must be configured to

terminate the bus. A table showing typical link configurations is

given opposite.