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Seagate ST12550N 2GB
Specification

Dimensions

Environment

Jumper Settings

Specification

Access Times Single Track Seek 0.6 msec Read 0.9 msec Write
Average Seek 8.0 msec Read 9.0 msec Write
Latency 4.17 msec
Power Up Time 30 seconds
Data Transfer Rate Disk to Buffer 5.96 MB/sec
Buffer to Host 5.0 MB/sec Async 10 MB/sec Sync
Drive Characteristics Cylinders 1,120
R/W Heads 19
Encoding RLL
Rotational Speed 7,200 rpm
Track Density 3,047 tpi
Reliability MTBF 500,000 POH
MTTR 30 mins

Dimensions

Height

1.63 in

41.4 mm

Width

4.0 in

101.6 mm

Depth

5.97 in

151.6 mm

Weight

2.3 lb

1.04 Kg

Environment

Non Operating

Operating
Temperature

-40°C to 70°C

5°C to 55°C
Humidity

5% to 95%

5% to 95%
Altitude

-1,000 to 40,000 ft

-1,000 to 10,000 ft
Vibration

2.0 G

0.5 G (No Data Loss)
Shock

50 G

2 G (No soft errors)

10 G (1 soft error/shock)
Acoustics

Sound power during idle mode 4.7 bels
Power +5V ± 5% +12V ± 5%

Mode of Operation

Typical Average Current (Amps rms)

Typical Average
Power (Watts)

+12V

+5V
Startup

2.18 peak

1.0 peak
Idle

0.83

0.76
Read/Write/Seek

1.1

0.85

16 W
Maximum Seeking

1.1

1.2

Jumper Settings

Jumper Block J4

Function

J4 Position

11

10

9

8

7

6

5

4

3

2

1

SCSI ID 0

-

-

-

-

-

-

-

-

-

-

-

SCSI ID 1

-

-

On

-

-

-

-

-

-

-

-

SCSI ID 2

-

On

-

-

-

-

-

-

-

-

-

SCSI ID 3

-

On

On

-

-

-

-

-

-

-

-

SCSI ID 4

On

-

-

-

-

-

-

-

-

-

-

SCSI ID 5

On

-

On

-

-

-

-

-

-

-

-

SCSI ID 6

On

On

-

-

-

-

-

-

-

-

-

SCSI ID 7

On

On

On

-

-

-

-

-

-

-

-

Reserved

-

-

-

On

-

-

-

-

-

-

-

Parity Disable

-

-

-

-

On

-

-

-

-

-

-

Enable Motor Start

-

-

-

-

-

On

-

-

-

-

-

Delay Motor Start

-

-

-

-

-

-

On

-

-

-

-

Write Protect

-

-

-

-

-

-

-

On

-

-

-

Remote LED Connector

-

-

-

-

-

-

-

-

On

-

-

Reserved

-

-

-

-

-

-

-

-

-

On

-

Spindle Sync Cable Connector

-

-

-

-

-

-

-

-

-

-

On

 

Jumper Block JO1

Function

Term Power from Drive*

Term Power from SCSI Bus*

Term Power to SCSI Bus

Term Power to SCSI Bus and Drive*

* Valid for single ended drives only.

 

Computing for a Connected World