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24 Cheetah 9LP Installation Guide, Rev. B
use these wide drives on a standard (non-wide) 8-bit data bus
if you provide proper termination to the upper 8-bit data lines.
This is often referred to as providing “high-9 termination.”
Figures 3, 4, and 5 show typical drive connections.
The following table lists the maximum cable lengths and number
of devices using single-ended and LVD I/O circuits allowed on a
daisy-chain cable for 10, 20, and 40 Mtransfers/sec I/O data
transfer rates.
A maximum of 16 devices can be connected on a 16-bit wide
data bus.
Table 1. Cable characteristics for SE and LVD circuits
SCSI
driver
type
I/O transfer rate
(Mtransfers/s)
Maximum
number of
devices on
bus
Maximum cable
length allowed
SE 10 16 6 meters (19.7 ft.)
SE 20 4 3 meters (9.8 ft.)
SE 20 8 1.5 meters (4.9 ft.)
LVD 40 16 12 meters (39.4 ft.)