2.0Drive specifications

Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal power. For convenience, the phrases the drive and this drive are used throughout this manual to indicate ST94011A, ST92011A, ST92811A, and ST94811A model drives.

2.1Specification summary

The specifications listed in this table are for quick reference. For details on specification measurement or defi- nition, see the appropriate section of this manual.

Table 1:

Specifications

 

 

 

 

 

 

 

 

 

 

 

Drive specification

ST94011A

ST94811A

 

ST92011A

ST92811A

 

 

 

 

 

 

Formatted Gbytes (512 bytes/sector)

40

40

 

20

20

 

 

 

 

 

 

Guaranteed sectors

78,140,160

78,140,160

 

39,070,080

39,070,080

 

 

 

 

 

 

Bytes per sector

512

 

 

 

 

 

 

 

 

 

 

Physical read/write heads

2

2

 

1

1

 

 

 

 

 

 

 

Discs

 

1

1

 

1

1

 

 

 

 

 

 

Cache (Mbytes)

2

8

 

2

8

 

 

 

 

 

 

Recording density, BPI (bits/inch max)

642,000

 

 

 

 

 

 

 

 

 

 

Track density. TPI (tracks/inch max)

100,780

 

 

 

 

 

 

 

 

 

 

Areal density (Mbits/inch2 max)

65

 

 

 

 

Spindle speed (RPM)

5,400

 

 

 

 

 

 

 

 

 

 

Internal data transfer rate OD (Mbytes/sec max)

48.25

 

 

 

 

 

 

 

 

 

 

Sustained data transfer rate OD (Mbytes/sec)

34.5

 

 

 

 

 

 

 

 

 

 

I/O data-transfer rate (Mbytes/sec max)

100

 

 

 

 

 

 

ATA data-transfer modes supported

PIO modes 0–4; Multiword DMA modes 0–2; Ultra DMA modes 0–5

 

 

 

 

 

Height

 

9.5 +/-0.2 mm (0.374 +/-.0078 inches)

 

 

 

 

 

 

Width

 

69.85 +/-0.25 mm (2.75 +/-0.0098 inches)

 

 

 

 

 

Length

 

100.2 +/-0.25 mm (3.945 +/-0.0098 inches)

 

 

 

 

 

Weight (typical)

99 grams (0.218 lb.)

 

 

 

 

 

 

 

 

Average latency (msec)

5.6

 

 

 

 

 

 

 

 

 

 

Power-on to ready (sec typical)

3.9

 

 

 

 

 

 

 

 

 

 

Standby to ready (sec typical)

2.6 sec

 

 

 

 

 

 

 

 

 

 

Startup current 5V (peak)

1.2 amps

 

 

 

 

 

 

 

 

Track-to-track seek time (msec typical)

1.5 (read), 2.0 (write)

 

 

 

 

 

 

 

 

Average seek time (msec typical)

12.0

 

 

 

 

 

 

 

 

 

 

Average seek, read (msec typical)

12.0

 

 

 

 

 

 

 

 

 

 

Average seek, write (msec typical)

14.0

 

 

 

 

 

 

 

 

 

 

 

Momentus 5400.1 Product Manual, Rev. F

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Seagate ST94011A, ST94811A, ST92811A, ST92011A manual Drive specifications, Specification summary, Specifications