Seagate ST94019A ユーザーズマニュアル

Momentus 42 Product Manual, Rev. A

3

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 
ST94019A, ST93015A, and ST92014A model drives.

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.  

Formatted Gbytes (512 bytes/sector)

40

30

20

Guaranteed sectors

78,140,160

58,605,120

39,070,080

Bytes per sector

512

Physical read/write heads

2

2

1

Discs

1

Cache (Mbytes)

2

Recording density, BPI (bits/inch max)

642,000

577,000

642,000

Track density. TPI (tracks/inch max)

100,780

Areal density (Bbits/inch

2 

max)

65

58

65

Spindle speed (RPM)

4,200-class performance

 

(spin speed actually 5,400 RPM)

Internal data transfer rate OD (Mbytes/sec max)

48.25

46.05

48.25

Sustained data transfer rate OD (Mbytes/sec)

31.0

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)

2.5 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