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MAID (massive array of idle drives) is an architecture using hundreds to thousands of hard drives for providing nearline storage of data. MAID is designed for write once, read occasionally (WORO) applications. [14] [15] [16] Compared to RAID technology, MAID has increased storage density, and decreased cost, electrical power, and cooling ...
The SuperDisk hardware was created by 3M's storage products group Imation in 1997. Serial ATA (SATA) Also Serial AT Attachment. A computer bus interface that connects host bus adapters to mass storage devices such as hard disk drives, optical drives, and solid-state drives.
On SCSI hard disk drives, the SCSI controller can directly control spin up and spin down of the drives. Some Parallel ATA (PATA) and Serial ATA (SATA) hard disk drives support power-up in standby (PUIS): each drive does not spin up until the controller or system BIOS issues a specific command to do so. This allows the system to be set up to ...
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.
For most disks, each sector stores a fixed amount of user-accessible data, traditionally 512 bytes for hard disk drives (HDDs), and 2048 bytes for CD-ROMs, DVD-ROMs and BD-ROMs. [1] Newer HDDs and SSDs use 4096 byte (4 KiB) sectors, which are known as the Advanced Format (AF). The sector is the minimum storage unit of a hard drive. [2]
SFF-8301 includes drive heights of 17.80, 26.10, and 42.00mm, but as of 2025, no drives are produced in 42mm height. Drives with heights not mentioned in SFF-8301 are manufactured, e.g. Seagate 19.99-mm-high drives [5] and a Samsung low-profile single-disc drive with a height of 18.288 millimetres (0.72 in). [3]
The first commercial digital disk storage device was the IBM 350 which shipped in 1956 as a part of the IBM 305 RAMAC computing system. The random-access, low-density storage of disks was developed to complement the already used sequential-access, high-density storage provided by tape drives using magnetic tape.
24 TB: The size of $440 (as of early 2024) "video" hard disk drive; 32 TB: Largest hard disk drive (as of mid-2024) 100 TB: Largest commercially available solid-state drive (as of mid-2024) 200 TB: Largest solid-state drive constructed (prediction for mid-2022) 1.6 PB (1600 TB): Amount of possible storage in one 2U server (world record as of ...