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4 Momentus Thin Product Manual, Rev. E

3.0 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 all

models.

3.1 Specification summary table

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: Drive specifications

Drive specification ST320LT020 - 9YG142 ST250LT003 - 9YG14C ST160LT003 - 9YG141

Formatted capacity (GB)* 320 250 160

Guaranteed logical blocks (LBA) 625,142,448 488,397,168 312,581,808

Bytes per physical sector 4096

Physical read/write heads 2 1

Disks 1

Cache (MB) 16

Recording density in BPI (bits/in avg) 1397k

Track density TPI (tracks/in avg) 315k

Areal density (Gb/in

avg) 425

Spindle speed (RPM) 5400

Average latency (ms) 5.6

Internal transfer rate (Mb/s max) 1044

I/O data transfer rate (Gb/s max) 3.0

ATA data-transfer modes supported SATA 1.0, Serial ATA Revision 2.6

PIO modes 0–4

Multiword DMA modes 0–2

Ultra DMA modes 0–6

Height (max) 7.0 mm (0.276 in)

Width (max) 70.10 mm (2.76 in)

Length (max) 100.55 mm (3.959 in)

Weight (max) <92.0 g (<0.203 lb)

Power-on to ready (sec typical) 3.5

Standby to ready (sec typical) 3.0

Track-to-track seek time, read (ms typical) 1.5

Average seek, read (ms typical) 11

Startup current, +5V (max) 1.0A

Read/write power (typical) Read: 1.30W; Write: 1.65W

Idle mode, low power (typical) 0.48W

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