Seagate Ironwolf 8TB NAS Internal Hard Drive ST8000VN004

Key Features:

• 7200 RPM spindle speed.
• Full-track multiple-sector transfer capability without local processor intervention.
• High instantaneous (burst) data-transfer rates (up to 600MB per second).
• Native Command Queuing with command ordering to increase performance in demanding applications.
• Perpendicular recording technology provides the drives with increased areal density.
• PowerChoice™ for selectable power savings
• SeaTools™ diagnostic software performs a drive self-test that eliminates unnecessary drive returns.
• State-of-the-art cache and on-the-fly error-correction algorithms.
• Support for S.M.A.R.T. drive monitoring and reporting.
• Supports latching SATA cables and connectors.
• Tarnish-resistant components to help protect drive from environmental elements, increasing field reliability.
• Worldwide Name (WWN) capability uniquely identifies the drive

About 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. 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 users to install a Serial ATA host adapter and Serial ATA disk drive in the current system and expect all of the 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: High Speed Serialized AT Attachment” specification. The specification can be downloaded from www.serialata.org

Specifications

• Formatted (512 bytes/sector)# : 8TB
• Heads : 10
• Discs : 5
• Bytes per logical sector : 512
• Bytes per physical sector : 4096
• Recording density, KBPI (Kb/in max) : 2509
• Track density, KTPI (ktracks/in, 0 skew) : 371
• Areal density, (Gb/in2, @ 0 skew mid-disk) : 930
• Spindle speed (RPM) : 7200
• Internal data transfer rate (Mb/s max) : 2850
• Sustained data transfer rate OD (MiB/s max) : 200 (210 MB/s max)
• I/O data-transfer rate (MB/s max) : 600
• ATA data-transfer modes supported PIO modes : 0–4
• Multiword DMA modes : 0–2
• Ultra DMA modes : 0–6
• Cache buffer : 256MB (262,144KB)
• Weight: (maximum) : 716g (1.579 lb)
• Average latency : 4.16ms
• Power-on to ready (sec) (typ/max) : 23/30
• Standby to ready (sec) (typ/max) : 23/30
• Startup current (typical) 12V (peak) : 1.8A
• Voltage tolerance (including noise) :
  • 5V ±5%
  • 12V ±10%
• Non-Operating temperature : –40° to 70°C (Ambient Temperature, see sections 2.6.1 and 2.11)
• Operating temperature* : 5°C to 70°C (Drive Reported Temperature)
• Temperature gradient (°C per hour max) :
  • 20°C (operating)
  • 20°C (nonoperating)
• Relative humidity* :
  • 5% to 95% (operating)
  • 5% to 95% (nonoperating)
• Relative humidity gradient : 20% per hour max
• Altitude, operating :
  • –304.8 m to 3,048 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 (max at 2 ms - typical) : Read 70 Gs / Write 40 Gs
• Non-Operational Shock (max at 2 ms - typical) : 300 Gs
• Vibration, operating :
  • 5–22 Hz: 0.25 Gs, Limited displacement
  • 22–350 Hz: 0.50 Gs
  • 350–500 Hz: 0.25 Gs
• Operation Rotational vibration : 20–1500Hz: 12.5 rads/s²
• Vibration, nonoperating : 10–500 Hz: 5.0 Grms ref
• Drive acoustics, sound power (bels) : 
  •  Idle 2.8 (typical)
  • 3.0 (max)
• During periods of drive idle, some offline activity may occur according to the
• SMART specification, which may increase acoustic and power to operational levels.
• Performance seek 3.2 (typical) : 3.4 (max)
• Nonrecoverable read errors  : 1 sector per 1015 bits read
• Annualized Failure Rate (AFR)* : 0.87% based on 8760 POH
• Maximum Rated Workload* : Maximum rate of <180TB/year
• Workloads exceeding the annualized rate may degrade the drive MTBF and impact product reliability. The Annualized Workload Rate is in units of TB per year, or TB per 8760 power on hours. Workload Rate = TB transferred * (8760 / recorded power on hours).
• Warranty : To determine the warranty for a specific drive, use a web browser to access the following web page: http://www.seagate.com/support/warranty-and-replacements/.
• From this page, click on the “Is my Drive under Warranty” link. The following are required to be provided: the drive serial number, model number (or part number) and country of purchase. The system will display the warranty information for the drive.
• Load-unload cycles (command controlled) : 600,000
• Supports Hotplug operation per Serial ATA Revision 3.3 specification : Yes