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Maxtor COrporation. All other trademarks or registered trademarks are the property of their
respective owners. One gigabyte, or GB, equals one billion bytes when referring to hard
drive capacity. Accessible capacity may vary depending on operating environment and formatting. Quantitative usage examples for various applications are for illustrative purposes.
Actual quantities will vary based on various factors, including file size, file format, features
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DiamondMax 20 Serial ATA Product Manual, Rev. A
iiiDiamondMax 20 Serial ATA Product Manual, Rev. A
• High instantaneous (burst) data-transfer rates (up to 300 Mbytes per second).
• Tunneling Giant Magnetoresistive (TGMR) recording heads and EPRML technology, provide the drives with
increased areal density.
• State-of-the-art cache and on-the-fly error-correction algorithms.
• Native Command Queueing with command ordering to increase performance in demanding applications.
• Full-track multiple-sector transfer capability without local processor intervention.
• Quiet operation.
• 350 Gs nonoperating shock.
• SeaTools diagnostic software performs a drive self-test that eliminates unnecessary drive returns.
• Support for S.M.A.R.T. drive monitoring and reporting.
• Supports latching SATA cables and connectors.
®
2
DiamondMax 20 Serial ATA Product Manual, Rev. A
1.1About the Serial ATA interface
The Serial ATA interface provides several advantages over the traditional (parallel) ATA interface. The primary
advantages include:
• Easy installation and configuration with true plug-and-play connectivity.
• Thinner and more flexible cabling for improved enclosure airflow and ease of installation.
• Scalability to higher performance levels.
In addition, Serial ATA makes the transition from pa rallel ATA easy by providing legacy softwar e suppo rt. S erial
ATA was designed to allow you to install a Serial ATA host adapter and Serial ATA disc drive in your current
system and expect all of your existing applications to work as normal.
The Serial ATA interface connects each disc drive in a point-to-point configuration with the Serial ATA host
adapter. There is no master/slave relationship with Serial ATA devices like there is with parallel ATA. If two
drives are attached on one Serial ATA host adapter, the host operating system views the two devices as if they
were both “masters” on two separate ports. This essentially means both drives behave as if they are Device 0
(master) devices.
Note.The host adapter may, optionally, emulate a master/slave environment to host software where two
devices on separate Serial ATA ports are represented to host software as a Device 0 (master) and
Device 1 (slave) accessed at the same set of host bus addresses. A host adapter that emulates a
master/slave environment manages two sets of shadow registers. This is not a typical Serial ATA
environment.
The Serial ATA host adapter and drive share the function of emulating parallel ATA device behavior to provide
backward compatibility with existing host systems and software. The Command and Control Block registers,
PIO and DMA data transfers, resets, and interrupts are all emulated.
The Serial ATA host ada pter cont ains a set of registe rs that sha dow the conte nt s of the trad it ional devic e regi sters, referred to as the Shadow Register Block. All Serial ATA devices behave like Device 0 devices. For additional information about how Serial ATA emulates parallel ATA, refer to the “Serial ATA: High Speed Serialized
AT Attachment” specification. The specification can be downloaded from www.serialata.org.
DiamondMax 20 Serial ATA Product Manual, Rev. A
3
2.0Drive 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 the
following drive models:
The specification s li sted in the fol lowing table are for quick r efer ence. For det ail s on sp ecifi cation measurement
or definition, see the appropriate section of this manual.
4
DiamondMax 20 Serial ATA Product Manual, Rev. A
T a ble 1: Drive specifications summary for 160 Gbyte models
Drive specificationSTM3160811ASSTM3160211AS
Formatted Gbytes (512 bytes/sector)*160
Heads2
Discs1
Guaranteed sectors312,581,808
Bytes per sector512
Default sectors per track63
Default read/write heads16
Default cylinders16,383
Recording density, KBPI (kbits/in max)756.09
Track density, KTPI (ktracks/in avg.)141.95
Areal density, (Gbits/in2 avg)103.8
Spindle speed (RPM)7,200
Internal data transfer rate (Mbits/sec max)867.2
Sustained data transfer rate OD (Mbytes/sec max)80
I/O data-transfer rate (Mbytes/sec max)300
ATA data-transfer modes supportedPIO modes 0–4
Cache buffer8 Mbytes2 Mbytes
Height (mm max)19.99 mm (0.787 inches)
Width (mm max)101.6 mm (4.000 inches) +/- 0.010 inches
Length (mm max)146.99 mm (5.787 inches)
Weight (max)380 grams (0.838 lb.)
Average latency (msec)4.16
Power-on to ready (sec max)<10.0 sec
Standby to ready (sec max)<10.0 sec
Track-to-track seek time (msec typical)<0.8 (read), <1.0 (write)
Average seek time (msec typical)<12.9 (read, <13.9 (write)
Startup current (typical) 12V (peak)2.8 amps
Voltage tolerance (including noise)5V ± 5%
Ambient temperature0° to 60°C (operating)
Temperature gradient (°C per hour max)20°C (operating)
Relative humidity5% to 90% (operating)
Relative humidity gradient30% per hour max
Wet bulb temperature (°C max)37.7 (operating)
Altitude, operating–60.96 m to 3,048 m
Altitude, nonoperating
(below mean sea level, max)
Operational Shock (Gs max at 2 msec)63
Non-Operational Shock (Gs max at 2 msec)350 Gs
Vibration, operating5–22 Hz: 0.25 Gs, Limited displacement
Drive acoustics, sound power (bels)
Idle**2.7 (typical)
Seek2.9 (typical)
Nonrecoverable read errors1 per 10
Annualized Failure Rate (AFR)0.34%
Warranty3 years on distribution units.
Contact start-stop cycles
(25°C, 50% rel. humidity)
Supports Hotplug operation per SATA II
specification
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
**Dur ing per io ds of driv e idle, some offline activity may oc cur accor di ng to the S.M .A.R.T . speci ficati on , wh ich may i ncrea se acoustic and
power to operational levels.
22–350 Hz: 5.0 Gs
350–500 Hz:: 1.0 Gs
2.8 (max)
3.1 (max)
14
bits read
50,000
Yes
6
DiamondMax 20 Serial ATA Product Manual, Rev. A
T a ble 2: Drive specifications summary for 80 and 40 Gbyte models
Drive acoustics, sound power (bels)
Idle**2.7 (typical)
Seek2.9 (typical)
Nonrecoverable read errors1 per 10
Annualized Failure Rate (AFR)0.34%
Warranty3 years on distribution units.
Contact start-stop cycles
(25°C, 50% rel. humidity)
Supports Hotplug operation per SATA II
specification
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
**Dur ing per io ds of driv e idle, some offline activity may oc cur accor di ng to the S.M .A.R.T . speci ficati on , wh ich may i ncrea se acoustic and
power to operational levels.
22–350 Hz: 5.0 Gs
350–500 Hz:: 1.0 Gs
2.8 (max)
3.1 (max)
14
bits read
50,000
Yes
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