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Compaq Deskpro EN Series of Personal Computers
6-7
6.2.2
Ultra ATA Hard Drives
10.0 GB
15.0 GB
20.0 GB
Formatted Capacity
Physical (MB)
Logical (MB)
10005
Not available
15020
8455
20020
8455
Compaq Spare Part Number
135364-001
192060-001
180475-001
Total Logical Sectors
19541088
29336832
39102336
Logical Geometry
Cylinders
Heads
Sectors
16383
16
63
16383
16
63
16383
16
63
Physical Geometry
Cylinders
Heads
Sectors
15011
8
214-312
24453
3
312-494 (20 zones)
19955
4
380-585 (10 zones)
Data Bytes/Sector
512
512
512
Sector Interleave
1:1
1:1
1:1
ECC Bytes
34
18 bytes
ON-THE-FLY
33 bytes FIRMWARE
18
Recording MethodEPR4
PRML
48/51 PRML
16/17 EPRML
Spin-Up Time (maximum)
TYP MAX
18 sec 31 sec
9 seconds
7.92 seconds
Spin-Down Time (maximum)
Not available
10 seconds
6.96 seconds
Seek Times, Logical
(Busy to Seek Complete)
Track-to-Track
Average (Read)
Full Stroke
TYP MAX
1.7ms 2.4ms
8.5 ms 9.5ms
15ms 18ms
MAX TYP
5.0ms 2.0ms
15.0ms 9.5ms
25.0ms 21.0ms
MAX TYP
0.5ms 0.4ms
8.0m s 7.5ms
16.4ms 15.7ms
Average Latency
5.56ms
4.17ms
4.16ms
Data Transfer Rate
@Disk to Buffer
@Interface w/o IORDY
PIO
DMA
UDMA
139.61 224.31 MB/s
16.6 MB/s
16.6 MB/s
66.6 MB/s
189.0 - 304.3 Mbits/s
12.5 MB/s
up to 16.6 MB/s
up to 33.3 MB/s
up to 66.6 MB/s
364Mbits/s Max
16.6 MB/s
16.6 MB/s
66.6 MB/s
RPM
7200+/-0.1%
7200+/-0.1%
7200+/- 0.2%