Seagate ST136403LW/LC ユーザーズマニュアル
12
Cheetah 36 Installation Guide, Rev. A
Data bus widths
These drives have a wide (16-bit) SCSI data bus. You can use
these drives on a non-wide (8-bit) data bus if you provide proper
termination to the upper eight data lines. This is often referred to
as providing “high-9 termination” (the other bit is for parity).
these drives on a non-wide (8-bit) data bus if you provide proper
termination to the upper eight data lines. This is often referred to
as providing “high-9 termination” (the other bit is for parity).
The following table lists the maximum cable lengths and number
of devices using single-ended and LVD I/O circuits.
of devices using single-ended and LVD I/O circuits.
Providing adequate cooling
The enclosure design must ensure adequate cooling for the
drive. The maximum ambient temperature allowed is 50
drive. The maximum ambient temperature allowed is 50
°
C.
The drive’s product manual (83329440) describes how to evalu-
ate the air-flow design. The evaluation consists of ensuring that
the case temperature of certain critical components remains
within acceptable limits during drive operation.
ate the air-flow design. The evaluation consists of ensuring that
the case temperature of certain critical components remains
within acceptable limits during drive operation.
Figure 2 shows two design approaches with one or more fans
used to generate air flow. The air-flow patterns can be created
used to generate air flow. The air-flow patterns can be created
Table 1.
SE and LVD bus configurations
SCSI
driver
type
driver
type
I/O transfer rate
(Mbytes/s)
(Mbytes/s)
Maximum
number of
devices on
bus
number of
devices on
bus
Maximum cable
length allowed
length allowed
SE
20
16
6 meters (19.7 ft.)
SE
40
4
3 meters (9.8 ft.)
SE
40
8
1.5 meters (4.9 ft.)
LVD
80
16
12 meters (39.4 ft.)