Western Digital will start deliveries of hard disk drives 10 TB volume. In addition to the record, they have the capacity and other features. The housing is completely sealed and filled with helium. Inside it managed to place seven plates, and outside such a disk can be cool as you like – at least in an oil bath.
New belongs to the series Ultrastar, focused on corporate customers. Therefore, the model is available with interfaces SATA 6 Gb/s and SAS 12 Gbit/s. Due to the buffer capacity of 256 MB and deep to optimize the hard drive firmware demonstrates high performance in different modes.
According to its own tests of set the baud rate for these disks is 249 MB/s. Average access time in the search mode is 8.0 ms. The average delay before executing the query – 4.16 ms. Improves the speed of read / write and record data density, is 816 gigabits per square inch (126.5 Gbit / cm 2).
Numerous security technologies allow it to run 24/7 throughout the entire period of operation. The warranty period is five years as calculated MTBF of 2.5 million hours. This indicator AFR (defect rate) is only 0.35%.
Data security functions provide built-in encryption SED (Self-Encrypting Drive), and guaranteed immediate erasure (ISE – Instant Secure Erase) to delete the file. For the version with the SAS interface is also available encryption that complies with Federal Information Processing Standards (FIPS) specifications and trusted platform developed by Trusted Computing Group. The composition of the latter includes AMD, Intel, IBM, HP and Microsoft.
It is noteworthy that despite the rate of 7200 rev / min and a large stack of plates, the disc does not require a large current. Due to the filling with helium reduces the resistance and the HDD is 56% more economical than the classic versions with air inside. During operation, the SATA models consume up to 6.8 watts, and SAS-version consume up to 9.5 watts.
The new drives are designed to operate in a dense arrangement where the heat exchange can be difficult. Primarily, this video surveillance system, the productive NAS and data centers. Permissible ambient temperature during operation of the HDD is from 5° C to 60° C.
Positively affects the work and a more stable internal environment. No air filters, pressure drop and marked “not to close the hole!” On the body this is a real HDA without any reservations.
Absorbing Hitachi Global Storage Technologies, the company Western Digital has strengthened its position by adding an asset-tested technology inherited more from IBM. HGST drives remain the most reliable and after the formal change of the trademark owner.
An additional advantage of the rate of absorption was the time to market of innovative solutions.
Former leader Seagate is “stuck” at around 8 TB and declares half the indicators of reliability.
For the past ten years, high-density data storage hard drives are achieved through the use of perpendicular magnetic recording (PMR). Interestingly, this method was first proposed by a Danish engineer Valdemar Poulsen at the turn of XVIII – XIX centuries. However, from 1956 to 2005 to the HDD uses a linear recording. Hard drive makers remembered PMR only when faced with a density limit.
This is now a mature and common technology also comes to its physical limits. All modern drives store data in vertical domains, but seal them even stronger without sacrificing reliability unlikely to succeed. Major manufacturers of hard drives development underway towards HAMR (Heat-assisted magnetic recording) magnetic recording, which uses lasers with pulse duration of the order of picoseconds.