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Momentus 4200.2 Product Manual, Rev. D

2.0 Drive 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

ST9100822A, ST9808210A, ST960821A, ST950212A, ST9402113A, and ST930219A model drives.

2.1 Specification summary

The specifications listed in this table are for quick reference. For details on specification measurement or

definition, see the appropriate section of this manual.

Table 1: Specifications

Drive specification ST9100822A ST9808210A ST960821A ST950212A ST9402113A ST930219A

Formatted Gbytes

(512 bytes/sector)

100 80 60 50 40 30

Guaranteed sectors 195,371,568 156,301,488 117,210,240 97,696,368 78,140,160 58,605,120

Bytes per sector 512

Physical read/write heads 4 3 3 2 2 2

Discs 2 2 2 1 1 1

Cache (Mbytes) 8 2

Recording density, BPI

(bits/inch typical)

703,000

Track density. TPI

(tracks/inch typical

115,000

Areal density (Gbits/inch

max) 86

Spindle speed (RPM) 4,200 RPM-Class Performance (Actual spin speed 5,400 RPM)

Internal data transfer rate OD

(Mbytes/sec max)

48.25

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 +/–.008 inches)

Width 69.85 +/–0.25 mm (2.750 +/–0.010 inches)

Length 100.2 +/–0.25 mm (3.945 +/–0.010 inches)

Weight (typical) 100 grams (0.22 lb)

Average latency (msec) 5.6

Power-on to ready (sec typical) 3.5

Standby to ready (sec typical) 3.0

Startup current 5V (typical) 1.0 amps

Track-to-track seek time

(msec typical)

1.0 (read), 1.5 (write)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 43 44

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