Compaq Armada e500 Compaq Armada E500 and Armada V300 Maintenance and Service - Page 141

Table 6-12, Magnetic tracks, surface

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Table 6-12 Continued 1.68 MB 1.44 MB 1.2 MB DMF 1.2 MB 720 KB Magnetic tracks 80 80 77 80 80 surface Optical servo N/A N/A N/A N/A N/A tracks/surface Sectors/track 21 18 8 15 9 Sector interleave 2:1 1:1 1:1 1:1 1:1 Spare sectors 0 0 0 0 0 Zones (each side) 1 1 1 1 1 Average random seek 70 ms 70 ms 70 ms 70 ms 70 ms Track-to-track seek 25 ms 25 ms 25 ms 25 ms 25 ms Max single seek 170 ms 170 ms 170 ms 170 ms 170 ms Average latency 41.67 ms 41.67 ms 41.67 ms 41.67 ms 41.67 ms Motor RPM 720± 0.5% 720± 0.5% 720± 0.5% 720± 0.5% 720± 0.5% Motor start time 800 ms 800 ms 800 ms 800 ms 800 ms Track density 135 TPI 135 TPI 135 TPI 135 TPI 135 TPI Track width 125 µm 125 µm 125 µm 125 µm 125 µm Encoding method MFM MFM MFM MFM MFM Max flux density 17,334 FCI 17,334 FCI 17,334 FCI 17,334 FCI 17,334 FCI Recording density 17,334 BPI 17,334 BPI 17,334 BPI 17,334 BPI 17,334 BPI Nominal transfer rate 150 KB/sec 150 KB/sec 125 KB/sec 125 KB/sec 75 KB/sec Nominal sustained transfer rate across interface 65 KB/sec read 32 KB/sec write 55 KB/sec read 28 KB/sec write 49 KB/sec read 25 KB/sec write 46 KB/sec read 23 KB/sec write 28 KB/sec read 14 KB/sec write Buffer transfer rate 4.0 4.0 4.0 4.0 4.0 MB/sec MB/sec MB/sec MB/sec MB/sec Specifications 6-9

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Specifications
6
-
9
Table 6-12
Continued
1.68 MB
DMF
1.44 MB
1.2 MB
1.2 MB
720 KB
Magnetic tracks
surface
80
80
77
80
80
Optical servo
tracks/surface
N/A
N/A
N/A
N/A
N/A
Sectors/track
21
18
8
15
9
Sector interleave
2:1
1:1
1:1
1:1
1:1
Spare sectors
0
0
0
0
0
Zones (each side)
1
1
1
1
1
Average
random seek
70 ms
70 ms
70 ms
70 ms
70 ms
Track-to-track
seek
25 ms
25 ms
25 ms
25 ms
25 ms
Max single seek
170 ms
170 ms
170 ms
170 ms
170 ms
Average latency
41.67 ms
41.67 ms
41.67 ms
41.67 ms
41.67 ms
Motor RPM
720±
0.5%
720±
0.5%
720±
0.5%
720±
0.5%
720±
0.5%
Motor start time
800 ms
800 ms
800 ms
800 ms
800 ms
Track density
135 TPI
135 TPI
135 TPI
135 TPI
135 TPI
Track width
125 μm
125 μm
125 μm
125 μm
125 μm
Encoding method
MFM
MFM
MFM
MFM
MFM
Max flux density
17,334
FCI
17,334
FCI
17,334
FCI
17,334
FCI
17,334
FCI
Recording density
17,334
BPI
17,334
BPI
17,334
BPI
17,334
BPI
17,334
BPI
Nominal transfer
rate
150
KB/sec
150
KB/sec
125
KB/sec
125
KB/sec
75
KB/sec
Nominal sustained
transfer rate
across interface
65
KB/sec
read
32
KB/sec
write
55
KB/sec
read
28
KB/sec
write
49
KB/sec
read
25
KB/sec
write
46
KB/sec
read
23
KB/sec
write
28
KB/sec
read
14
KB/sec
write
Buffer transfer rate
4.0
MB/sec
4.0
MB/sec
4.0
MB/sec
4.0
MB/sec
4.0
MB/sec