Compaq 470013-444 Deskpro EX Series of Personal Computers Maintenance&Serv - Page 65

Ultra ATA Hard Drives, Physical MB, Logical MB, 26 EPRML, seconds, Busy to Seek Complete

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

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Compaq Deskpro EX 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%