Seagate Part #/MPN: ST500NM0021
DiscTech Item #: SGT-ST500NM0021-BN-5Y
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Interface Types: SAS Serial Attached SCSI
Form Factor: 3.5inx1.0in LFF Hard Drive
Sector Size: 512 / 512e
Sustained Throughput: 62 to 152
Average Seek Time: 8.3/9.3
Electrical Interface: SAS-2 Serial Attached SCSI v2 - 6.0Gbps
On-Board Cache: 64MB
Seagate ST500NM0021 500GB 3.5in 6Gbps 7.2K RPM HS SED Constellation ES.1 SAS HDD - Brand New
Seagate ST500NM0021 500GB 3.5" 6.0 Gbps 7200 RPM Hot Swappable Self-Encrypting Drive Constellation ES.1 Serial Attached SCSI Hard Disk Drive - Brand New
Constellation ES.1 drives provide high performance, high capacity data storage for a variety of systems including engineering workstations, network servers, mainframes, and supercomputers. The Serial Attached SCSI interface is designed to meet next-generation computing demands for performance, scalability, flexibility and high-density storage requirements.
Constellation ES.1 drives are random access storage devices designed to support the Serial Attached SCSI Protocol as described in the ANSI specifications. Constellation ES.1 drives are classified as intelligent peripherals and provide level 2 conformance (highest level) with the ANSI SCSI-1 standard.
The Self-Encrypting Drive models indicated on the cover of this product manual have provisions for “Security of Data at Rest” based on the standards defined by the Trusted Computing Group.
The head and disk assembly (HDA) is sealed at the factory. Air recirculates within the HDA through a non-replaceable filter to maintain a contamination-free HDA environment.
Constellation ES.1 drives use a dedicated load/unload zone at the outermost radius of the media to eliminate the possibility of destroying or degrading data by landing in the data zone. The heads automatically go to the ramp load/unload when power is removed from the drive.
An automatic shipping lock prevents potential damage to the heads and discs that results from movement during shipping and handling. The shipping lock disengages and the head load process begins when power is applied to the drive.
Constellation ES.1 drives decode track 0 location data from the servo data embedded on each surface to eliminate mechanical transducer adjustments and related reliability concerns.
The drives also use a high-performance actuator assembly with a low-inertia, balanced, patented, straight arm design that provides excellent performance with minimal power dissipation.
Constellation ES.1 drives have the following standard features:
- Perpendicular recording technology
- 1.5 / 3 / 6 Gb Serial Attached SCSI (SAS) interface
- Integrated dual port SAS controller supporting the SCSI protocol
- Support for SAS expanders and fanout adapters
- Firmware downloadable using the SAS interface
- 128 - deep task set (queue)
- Supports up to 32 initiators
- Jumperless configuration.
- User-selectable logical block size (512, 520 or 528 bytes per logical block).
- Industry standard 3.5-inch dimensions
- Programmable logical block reallocation scheme
- Flawed logical block reallocation at format time
- Programmable auto write and read reallocation
- Reallocation of defects on command (Post Format)
- ECC maximum burst correction length of 400 bits
- No preventive maintenance or adjustments required
- Embedded servo design
- Dedicated head load/unload zone
- Self diagnostics performed when power is applied to the drive
- Vertical, horizontal, or top down mounting
- 64 Mbyte data buffer
- Drive Self Test (DST)
- Background Media Scan (BMS)
- Idle Read After Write (IRAW)
- Power Save
Constellation ES.1 SAS Self-Encrypting Drive models have the following additional features:
- Automatic data encryption/decryption
- Controlled access
- Random number generator
- Drive locking
- 16 independent data bands
- Cryptographic erase of user data for a drive that will be repurposed or scrapped
- Authenticated firmware download
This drive is compatible with any server that accepts 3.5"x1.0" (LFF Hard Drive) SAS Drive.
|Internal Drive Characteristics|
|Self-Encrypting Drive (SED)||Yes|
|FIPS 140-2 Level 2||No|
|Read/Write Data Heads||2|
|Bytes Per Track||1,012,608|
|Bytes Per Surface||250,000|
|Tracks Per Surface||248,600|
|Tracks Per Inch||237,000|
|Peak Bits Per Inch||1,523,000|
|Internal Data Rate||95 - 212|
|Disk Rotation Speed||7200|
|Avg. Rotational Latency||4.16|
|Seek Performance Characteristics|
|Average Access Time (Typical) Not Including Controller Overhead (Read/Write, ms)||8.3/9.3|
|Average Access Time (Typical) Including Controller Overhead (Read/Write, ms)||8.5/9.5|
|Single Track Access Time (Typical) Not Including Controller Overhead (Read/Write, ms)||0.5/0.8|
|Single Track Access Time (Typical) Including Controller Overhead (Read/Write, ms)||0.7/1.0|
|Full Stroke Access Time (Typical) Not Including Controller Overhead (Read/Write, ms)||18/19|
|Full Stroke Access Time (Typical) Including Controller Overhead (Read/Write, ms)||18.2/19.2|
|Format Command Execution Time for 512-Byte Sector (Minutes) Maximum (With Verify)||173|
|Format Command Execution Time for 512-Byte Sector (Minutes) Maximum (Without Verify)||86|
|General Performance Characteristics|
|Minimum Sector Interleave||1 to 1|
|Data Buffer To/From Disk Media (One 512-Byte Logical Block)||95 to 212 MB/s|
|Sustained Transfer Rate||62 to 152 MB/s|
|SAS Interface Maximum Instantaneous Transfer Rate||600MB/s per port (dual port = 1200MB/s)|
|Logical Block Sizes||512 (Default), 520 or 528|
|Read/write consecutive sectors on a track||Yes|
|Average Rotational Latency||4.16ms|
|Seek Error Rate||Less Than 10 Errors in 10E8 Seeks|
|Read Error Recovered Data Rates||Less Than 10 Errors in 10E12 Bits Transferred (OEM Default Setting)|
|Read Error Unrecovered Data Rates||Less Than 1 Sector in 10E15 Bits Transferred|
|Read Error Miscorrected Data Rates||Les Than 1 Sector in 10E21 Bits Transferred|
|Interface Error Rate||Less Than 1 Error in 10E12 Bits Transferred|
|Mean Time Between Failure (MTBF)||1,200,000 Hours|
|Annualized Failure Rate (AFR)||0.73%|
|Preventive Maintenance||None Required|
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Weight: 1.8 lb
Warranty: 5 Year Manufacturer
The product is brand new.
5 Year Manufacturer Warranty
The product has a manufacturer warranty for the time period specified.