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10
ST43401N/ND and ST43402ND Reference Manual, Rev. C
To evaluate the air-flow design, place the drive in its final mechanical position
and perform random read and write operations. After the temperatures
stabilize, measure the surface (case) temperatures of the components listed
in the appropriate table below. The mean time between failures (MTBF)
values assume that the drive operates below the specified reliability guide-
lines.
Table 1. ST43401N/ND air-flow evaluation
Card
Component
S/RYFX
PERI-2
S/RYFX
Video AMP
S/RYFX
RDS
S/RYFX
ECLTTL
S/RYFX
SCRAM
S/RYFX
DRAM
FYEX
Motor control U10(A211)
HDA housing
*
o
Temperature in
C
Table 2. ST43402ND air-flow evaluation
Card
Component
AYGX
PERI-2
AYGX
Video AMP
AYGX
RDS
AYGX
ECLTTL
AYGX
SCRAM
AYGX
Driver
FYEX
Motor control U10 (A211)
BYGX
ECLTTL
HDA housing
*
o
Temperature in
C
Office
environment room
MTBF
200k hours
Reference
case temp*
D540
45
F826
55
G115
55
D212
47
C051
44
B405
42
51
Figure 6
Office
environment room
MTBF
200k hours
Reference
case temp*
U40 (D540)
45
U44 (F826)
52
U56 (G115)
56
U33 (D709)
46
U6 (B145)
45
U26 (B107)
45
49
U7 (D417)
52
Figure 6
Computer
MTBF
Max
300k hours
allowable
case temp*
case temp*
35
60
45
70
45
70
37
62
34
59
32
57
41
66
60
Computer
MTBF
Max
300k hours
allowable
case temp*
case temp*
35
60
42
67
46
71
36
61
35
60
35
60
39
64
42
67
60
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