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Available in capacities between 80 GB to 750 GB and either an ATA/100 or SATA 3 Gbit/s interface. 2, 8 or 16 MB of cache, depending on the model. This was the first Seagate hard drive to use perpendicular magnetic recording (PMR) technology (only in 250 GB SATA models: ST3250410AS with 16 MB of cache and ST3250310AS with 8 MB of cache).
The software is designed to find, test, diagnose and repair hard disk drives, reveal problems, display health and avoid failures by using S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) function of hard disk drives. [34] [35] [36] The detected information can be saved to file in formats such as HTML, text, or XML. [37] [38] [39]
The capacity of a hard disk drive, as reported by an operating system to the end user, is smaller than the amount stated by the manufacturer for several reasons, e.g. the operating system using some space, use of some space for data redundancy, space use for file system structures.
Self-Monitoring, Analysis, and Reporting Technology (S.M.A.R.T. or SMART) is a monitoring system included in computer hard disk drives (HDDs) and solid-state drives (SSDs). [3] Its primary function is to detect and report various indicators of drive reliability, or how long a drive can function while anticipating imminent hardware failures.
ExcelStor ES3220 20 GB drive Mechanism of an ExcelStor 80 GB hard disk manufactured in 2004. ExcelStor Technology (Chinese: 易拓科技) was established in 2000 as a small hard disk drive manufacturer and has evolved into a contract manufacturer and a system integrator.
Western Digital WD740GD A Fujitsu laptop drive (80 GB, 7,200 RPM) on the left and a Western Digital VelociRaptor (300 GB, 10,000 RPM). The Western Digital Raptor (often marketed as WD Raptor, 2.5" models known as VelociRaptor) is a discontinued series of high performance hard disk drives produced by Western Digital first marketed in 2003.
Some vendor-specific external drive enclosures (e.g. Maxtor, owned by Seagate since 2006) are known to use HPA to limit the capacity of unknown replacement hard drives installed into the enclosure. When this occurs, the drive may appear to be limited in size (e.g. 128 GB), which can look like a BIOS or dynamic drive overlay (DDO) problem.
Enterprise-class drives can have a height up to 15 mm. Seagate released a 7 mm drive aimed at entry level laptops and high end netbooks in December 2009. Western Digital released on April 23, 2013 a hard drive 5 mm in height specifically aimed at Ultrabooks. [37] Toshiba MK1216GSG 1.8" 120 GB hard disk drive with Micro SATA