Seagate ST320LT012 320GB SATA Hard Drive

Capacity: 320GB
Spindle Speed: 5,400RPM
Interface Type: SATA
Disk Size: 2.5″x7mm (Thin / Case)
Sustained Throughput (MBps): 100
Average Seek Time (read/write ms): 5.6
Electrical Interface Speed: SATA 300 – 3.0Gbps
On-Board Cache: 16MB

Seagate ST320LT012 320GB 2.5″ 3.0 Gbps 5400 RPM Hot Swappable Momentus Thin Serial Advanced TECHNOLOGY Attachment Hard Disk Drive – Brand New

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. It is not necessary to set any jumpers or other configuration options.
• 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 parallel ATA easy by providing legacy software support. Serial ATA was designed to allow you to install a Serial ATA host adapter and Serial ATA disk drive in your current system and expect all of your existing applications to WORK as normal.

The Serial ATA interface connects each disk 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.

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 adapter contains a set of registers that shadow the contents of the traditional device registers, 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 International Organization: Serial ATA (Revision 2.6).

These drives provide the following key features:

• 5400-RPM spindle speed.
• 16MB buffer.
• Quiet operation. Fluid Dynamic Bearing (FDB) motor.
• High instantaneous (burst) data-transfer rates (up to 3Gb/s)..
• Perpendicular recording TECHNOLOGY.
• State-of-the-art cache and on-the-fly error-correction algorithms.
• Native Command Queuing (NCQ) with command ordering.
• Full-track multiple-SECTOR transfer capability without local processor intervention.
• 1000 Gs nonoperating shock and 400 Gs of operating shock.
• SeaToolsTM diagnostic software performs a drive self-test that eliminates unnecessary drive returns.
• The 3D Defense System™, which includes Drive Defense, Data Defense and Diagnostic Defense, offers the industry’s most comprehensive protection for disk drives.
• Support for S.M.A.R.T. drive monitoring and reporting.
• Support for Read Multiple and Write Multiple commands.
• Worldwide Name (WWN) capability uniquely identifies the drive.

• Drive Model	ST320LT012
  Capacity	320GB
  Interface	SATA 3Gb/s
  Drive Specification
  SED models	No
  FIPS 140-2 models	No
  Guaranteed SECTORS	625,142,448
  Heads	2
  Disks	1
  Bytes per sector	512 (logical)/4096 (physical)
  Recording density	1958 Kb/in
  Track density	360 Ktracks/in avg
  Areal density	705 Gb/in avg
  Spindle speed	5400 RPM
  Sustained data transfer rate OD	100 MB/s max
  I/O data-transfer rate	300 MB/s max
  ATA data-transfer modes supported	PIO modes 0-4, Multiword DMA modes 0-2, Ultra DMA modes 0-6
  Cache buffer	16 MB
  Height	6.8 +/- 0.2 mm (0.268 +/-.008 in)
  Width	69.85 +/- 0.25 mm (2.750 +/- 0.010 in)
  Length	100.35 +0.20 / -0.25 mm (3.951 +0.008 / -0.010 in)
  Weight (typical)	95 g (0.209 lb)
  Average latency	5.6 ms
  Startup current (typical) 5V (peak)	1.0 A
  Voltage tolerance (including noise)	5V ± 5%
  Operating temperature	0° to 60°C
  Nonoperating temperature (Ambient)	–40° to 70°C
  Operating Temperature gradient (max)	20°C per hour max
  Nonoperating Temperature gradient (max)	35°C per hour max
  Operating Relative humidity	5% to 95%
  Nonoperating Relative humidity	5% to 95%
  Relative humidity gradient	30% per hour max
  Operating Wet bulb temperature (max)	37.7°C max
  Nonoperating Wet bulb temperature (max)	40.0°C max
  Altitude, operating	–304.8 m to 3048 m (–1000 ft to 10,000+ ft)
  Altitude , nonoperating (below mean sea level, max)	–304.8 m to 12,192 m (–1000 ft to 40,000+ ft)
  Operational Shock	400 Gs at 2 ms max
  Non-Operational Shock	1000 Gs at 1 ms max
  Vibration, operating	5–200 Hz: 2.0 Gs, 201–500 Hz: 1.0 Gs
  Vibration, nonoperationg	5–500 Hz: 5.0 Gs
  Nonrecoverable read errors	1 per 10E14 bits read
  Load-unload cycles	600,000 at 25°C, 50% rel. humidity
  Supports Hotplug operation per the Serial ATA Revision 2.6 specification	Yes