Seagate ST9402112A Laptop Hard Drives

Seagate Momentus 4200.2 40GB 4.2K 2.5" IDE ST9402112A Laptop Hard Drive - Brand New OEM

Designed for durability and low-power consumption, Seagate® Notebook Internal 2.5-inch Hard Drives deliver the highest performance and reliability to help you optimize your mobile lifestyle. Packaged in a convenient retail kit, the Notebook Internal 2.5-inch Hard Drive effortlessly handles all the demands of a mobile lifestyle.

Compatibility

Drive specification	ST9402112A
Formatted Gbytes (512 bytes/sector)*	40
Guaranteed sectors	78,140,160
Bytes per sector	512
Discs	1
Default read/write heads	2
AFR	0.73%
Recording density, BPI (bits/inch typical)	703,00
Track Density TPI (Tracks/inch typical)	115,000
Areal density (Mbits/sq. inch avg)	86
Spindle speed (RPM)	4,200
Interface	Ultra ATA/100
Sustained transfer rate OD (Mbytes/sec)	48.25
I/O data transfer rate (Mbytes/sec max)	100
ATA data-transfer modes supported	PIO modes 0–4Multiword DMA modes 0–2Ultra DMA modes 0–5
Cache buffer	8 Mbytes
Height (max)	9.5mm (0.374 in)
Width (max)	69.85mm (2.750 in)
Length (max)	100.2mm (3.945 in)
Weight (max) grams	100
Average latency (msec)	5.6
Power-on to ready (typical)	3.5 sec
Standby to ready (typical)	3.0 sec
Track-to-track seek time (msec typical)	1.0 (read), 1.5 (write)
Startup current 5V (typical)	1.0 amps
Average seek time (msec typical)	12.5
Average seek, read (msec typical)	12.5
Average seek, write (msec typical)	14.5
Full-stroke seek (msec)	22
Seek Power	2.3 watts
Read/write power (typical)	2.3 watts
Standby mode	0.2 watts
Voltage tolerance (including noise)	5V ± 5% 12V ± 10%
Acoustics	2.9 bels