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Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 6-7
6.2.2 Ultra ATA Hard Drives
10.0 GB 15.0 GB
Formatted Capacity
Physical (MB)
Logical (MB)
10242
10242
15364
15364
Compaq Spare Part Number
203139-001 202903-001
Logical Block Allocation
Total Sectors
User Addressable Sectors
16514064
19541088
16514064
29336832
Sectors per Track
Physical
Logical
648-396
63
648-396
63
Data Heads/Cylinder
Physical
Logical
2
16
3
16
Data Bytes/Sector
512 512
Sector Interleave
1:1 1:1
ECC Bytes
24 24
Encoding Method
24/26 EPRML 24/26 EPRML
Spin-Up Time (maximum)
15 seconds 15 seconds
Spin-Down Time (maximum)
15 seconds 15 seconds
Seek Times, Logical
(Busy to Seek Complete)
Track-to-Track
Average (Read)
Full Stroke
MAX TYP
4.75ms 2.1ms
11.5ms 10.9ms
27.0ms 25.0ms
MAX TYP
4.75ms 2.1ms
11.5ms 10.9ms
27.0ms 25.0ms
Average Latency
5.56ms 5.56ms
Data Transfer Rate
@Disk to Buffer
@Interface w/o IORDY
DMA
UDMA
308 Mbits/s (max.)
16.6 MB/s
16.6 MB/s
66.6 MB/s
308 Mbits/s (max.)
16.6 MB/s
16.6 MB/s
66.6 MB/s
RPM
5400+/-0.2% 5400+/-0.2%