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This manual describes the functional, mechanical and interface specifications for the following Maxtor
DiamondMax® 21 PATA model drives:
STM3320820ASTM3250820ASTM3200820A
STM3300620ASTM3250620A
These drives provide the following key features:
• 7,200-RPM spindle speed
• High instantaneous (burst) data transfer rates (up to 100 Mbytes per second) using Ultra DMA mode 5.
• Tunneling Giant magnetoresistive (TGMR) recording heads and EPRML technology, which provide the
drives with increased areal density.
• State-of-the-art cache and on-the-fly error-correction algorithms.
• Full-track multiple-sector transfer capability without local processor intervention.
• Quiet operation.
• SeaTools diagnostic software performs a drive self-test that eliminates unnecessary drive returns.
• Support for S.M.A.R.T. drive monitoring and reporting.
• Support for Read Multiple and Write Multiple commands.
• Support for autodetection of master/slave drives that use cable select (CSEL).
®
DiamondMax 21 PATA Product Manual, Rev. A1
2DiamondMax 21 PATA Product Manual, Rev. A
2.0Drive specifications
Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal
power. For convenience, the phrases t he drive and this drive are used throughout th is manual to indi cate the
following drive models:
The specifications li sted in the following tables a re for quick reference. For details on specificati on measurement or definition, see the appropriate section of this manual.
DiamondMax 21 PATA Product Manual, Rev. A3
Table 1: Drive specifications summary for the 320 Gbyte model
Drive specificationSTM3320820A
Formatted Gbytes (512 bytes/sector)*320
Guaranteed sectors625,142,448
Heads4
Discs2
Bytes per sector512
Default sectors per track63
Default read/write heads16
Default cylinders16,383
Recording density781 kbits/in max
Track density145 ktrakcs/in avg.
Areal density114.4 Gbits/in
Spindle speed7,200 RPM
Internal data transfer rate1,030 Mbits/sec max
Sustained data transfer rate72 Mbytes/sec max
I/O data-transfer rate100 Mbytes/sec max
ATA data-transfer modes supportedPIO modes 0–4
Cache buffer8 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)
Weight580 grams
Average latency4.16 msec
Power-on to ready (max)15 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%
Ambient temperature0° to 60°C (operating)
Temperature gradient20°C per hour max (operating)
Relative humidity5% to 90% (operating)
Relative humidity gradient30% per hour max
Wet bulb temperature (max)37.7°C (operating)
Altitude, operating–60.96 m to 3,048 m
Altitude, nonoperating
(below mean sea level, max)
Operational Shock68 G at 2 msec
Non-Operational Shock350 G at 2 msec
Drive acoustics, sound power (Bels)
Idle**2.7 (typical)
Quiet seek3.0 (typical)
Nonrecoverable read errors1 per 10
Annualized Failure Rate (AFR)0.34%
Warranty3 years on distribution units.
Contact start-stop cycles50,000 at 25°C, 50% rel. humidity
22–350 Hz: 0.50 G
350–500 Hz:: 0.25 G
22–350 Hz: 5.0 G
350–500 Hz:: 1.0 G
3.0 (max)
3.4 (max)
14
bits read
To determine the warranty for a specific drive, use a web browser to
access the following web page:
www.seagate.com/support/service/
From this page, click on the “Verify Your Warranty” link. You will be
asked to provide the drive serial number, model number (or part number) and country of purchase. The system will display the warranty
information for your drive.
DiamondMax 21 PATA Product Manual, Rev. A5
Table 2: Drive specifi cations summary for the 300 Gbyte model
Drive specificationSTM3300620A
Formatted Gbytes (512 bytes/sector)*300
Guaranteed sectors586,072,368
Heads4
Discs2
Bytes per sector512
Default sectors per track63
Default read/write heads16
Default cylinders16,383
Recording density781 kbits/in max
Track density145 ktracks/in avg.
Areal density114.4 Gbits/in
Spindle speed7,200 RPM
Internal data transfer rate1,030 Mbits/sec max)
Sustained data transfer rate OD72 Mbytes/sec max
I/O data-transfer rate100 Mbytes/sec max
ATA data-transfer modes supportedPIO modes 0–4
Cache buffer16 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)580 grams
Average latency4.16 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%
Ambient temperature0° to 60°C (operating)
Temperature gradient20°C per hour max(operating)
Relative humidity5% to 90% (operating)
Relative humidity gradient30% per hour max
Wet bulb temperature37.7°C max (operating)
Altitude, operating–60. 96 m to 3,048 m
Altitude, nonoperating
(below mean sea level, max)
Operational Shock68 G at 2 msec
Non-Operational Shock350 G at 2 msec
Drive acoustics, sound power (Bels)
Idle**2.5 (typical)
Quiet seek3.0 (typical)
Nonrecoverable read errors1 per 10
Annualized Failure Rate (AFR)0.34%
Warranty3 years on distribution units.
Contact start-stop cycles50,000 at 25°C, 50% rel. humidity
22–350 Hz: 0.50 G
350–500 Hz:: 0.25 G
22–350 Hz: 5.0 G
350–500 Hz:: 1.0 G
2.8 (max)
3.1 (max)
14
bits read
To determine the warranty for a specific drive, use a web browser to
access the following web page:
www.seagate.com/support/service/
From this page, click on the “Verify Your Warranty” link. You will be
asked to provide the drive serial number, model number (or part
number) and country of purchase. The system will display the warranty information for your drive.
DiamondMax 21 PATA Product Manual, Rev. A7
Table 3: Drive specifications summary for 250 Gbyte models
Drive specificationSTM3250820ASTM3250620A
Formatted Gbytes (512 bytes/sector)*250
Guaranteed sectors488,397,168
Heads3
Discs2
Bytes per sector512
Default sectors per track63
Default read/write heads16
Default cylinders16,383
Recording density813 kbits/in max
Track density145 ktracks/in avg.
Areal density114.4 Gbits/in
Spindle speed7,200 RPM
Internal data transfer rate1,030 Mbits/sec max
Sustained data transfer rate OD72 Mbytes/sec max
I/O data-transfer rate100 Mbytes/sec max
ATA data-transfer modes supportedPIO modes 0–4
Cache buffer8 Mbytes16 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)580 grams
Average latency4.16 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%
Ambient temperature0° to 60°C (operating)
Temperature gradient20°C per hour max (operating)
Relative humidity5% to 90% (operating)
Relative humidity gradient30% per hour max
Wet bulb temperature37.7°C max (operating)
Altitude, operating–60. 96 m to 3,048 m
Altitude, nonoperating
(below mean sea level, max)
Operational Shock68 G at 2 msec
Non-Operational Shock350 G at 2 msec
To determine the warranty for a specific drive, use a web browser to
access the following web page:
www.seagate.com/support/service/
From this page, click on the “Verify Your Warranty” link. You will be asked
to provide the drive serial number, model number (or part number) and
country of purchase. The system will display the warranty information for
your drive.
DiamondMax 21 PATA Product Manual, Rev. A9
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