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Chapter 1 23
Hard Disc Drive Interface(1)
Item Specification
Vendor &
Model
Name
Toshiba
20G
MK2023
GAS
Toshiba
30G
MK3021
GAS
Toshiba
40G
MK4021
GAS
Toshiba
60G
MK6021
GAS
Hitachi
20G
IC25N02
0-
ATMR04
Hitachi
30G
IC25N03
0-
ATMR04
Hitachi
40G
IC25N04
0-
ATMR04
Hitachi
60G
IC25N06
0-
ATMR04
Capacity
(MB)
20000 30000 40000 60000 20000 30000 40000 60000
Bytes per
sector
512 512 512 512 512 512 512 512
Data heads 22341223
Drive Format
Disks11221112
Spindle
speed
(RPM)
4200
RPM
4200
RPM
4200
RPM
4200
RPM
4200
RPM
4200
RPM
4200
RPM
4200
RPM
Performance Specifications
Buffer size 2048KB 2048KB 2048KB 2048KB 2048KB 2048KB 2048KB 2048KB
Interface ATA-5 ATA-5 ATA-5 ATA-5 ATA-5 ATA-5 ATA-5 ATA-5
Max. media
transfer
rate (disk-
buffer,
Mbytes/s)
164.6~
257.1
154.3~
298.0
154.3~
298.0
154.3~
298.0
350 350 350 350
Data
transfer
rate
(host~buffe
r, Mbytes/s)
100 MB/
Sec.
Ultra
DMA
mode-5
100 MB/
Sec.
Ultra
DMA
mode-5
100 MB/
Sec.
Ultra
DMA
mode-5
100 MB/
Sec.
Ultra
DMA
mode-5
100 MB/
Sec.
Ultra
DMA
mode-5
100 MB/
Sec.
Ultra
DMA
mode-5
100 MB/
Sec.
Ultra
DMA
mode-5
100 MB/
Sec.
Ultra
DMA
mode-5
DC Power Requirements
Voltage
tolerance
5V(DC)
+/- 5%
5V(DC)
+/- 5%
5V(DC)
+/- 5%
5V(DC)
+/- 5%
5V(DC)
+/- 5%
5V(DC)
+/- 5%
5V(DC)
+/- 5%
5V(DC)
+/- 5%
Hard Disc Drive Interface(2)
Item Specification
Vendor & Model
Name
Seagate 40G
Neptune
ST94011A
(5400rpm) f/w
code 3.05
HGST 40G
MORAGA
HTS548040M9AT
00
HGST 60G
MORAGA
HTS548060M9AT
00
Toshiba 60G
Triton
MK6022GAX
Capacity (MB) 40000 40000 60000 60000
Bytes per sector 512 512 512 512
Data heads 2 2 3 4
Drive Format
Disks 1 1 2 2
Spindle speed
(RPM)
5400RPM 5400RPM 5400RPM 5400RPM
Performance Specifications
Buffer size 8MB 8MB 8MB 16384KB