Seagate DiamondMax 21 Manual download pdf (Page 12)

6 DiamondMax 21 PATA Product Manual, Rev. B

Table 2: Drive specifications summary for 250 and 200 Gbyte models

Drive specification STM3250620A STM3250820A STM3200820A

Formatted Gbytes (512 bytes/sector)* 250 200

Guaranteed sectors 488,397,168 390,721,968

Heads 3

Discs 2

Bytes per sector 512

Default sectors per track 63

Default read/write heads 16

Default cylinders 16,383

Recording density 813 kbits/in max 781 kbits/in max

Track density 145 ktracks/in avg.

Areal density 114.4 Gbits/in

avg

Spindle speed 7,200 RPM

Internal data transfer rate 1,030 Mbits/sec max

Sustained data transfer rate OD 72 Mbytes/sec max

I/O data-transfer rate 100 Mbytes/sec max

ATA data-transfer modes supported PIO modes 0–4

Multiword DMA modes 0–2

Ultra DMA modes 0–5

Cache buffer 16 Mbytes 8 Mbytes

Height (max) 26.1 mm (1.028 inches)

Width (max) 101.6 mm (4.000 inches) +/- 0.010 inches

Length (max) 146.99 mm (5.787 inches)

Weight (max) 600 grams

Average latency 4.16 msec

Power-on to ready (max) 11 sec

Standby to ready (max) 15 sec

Track-to-track seek time (typical) <0.8 msec (read), <1.0 msec (write)

Average seek, read (typical) <11.0 msec

Average seek, write (typical) <12.0 msec

Startup current (typical) 12V (peak) 2.8 amps

Voltage tolerance (including noise) 5V ± 5%

12V ± 10%

Ambient temperature 0° to 60°C (operating)

–40° to 70°C (nonoperating)

Temperature gradient 20°C per hour max (operating)

30°C per hour max (nonoperating)

Relative humidity 5% to 90% (operating)

5% to 95% (nonoperating)

Relative humidity gradient 30% per hour max

Wet bulb temperature 37.7°C max (operating)

37.7°C max (nonoperating)

Altitude, operating –60.96 m to 3,048 m

(–200 ft. to 10,000+ ft.)

Altitude, nonoperating

(below mean sea level, max)

–60.96 m to 12,192 m

(–200 ft. to 40,000+ ft.)

Operational Shock 68 G at 2 msec

Non-Operational Shock 350 G at 2 msec

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 49 50

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Seagate DiamondMax 21 Manual Page 12

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