硬碟修復壞軌程式 相關
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An Intel mSATA SSD Samsung M.2 NVMe SSD A solid-state drive (SSD) is a solid-state storage device. It provides persistent data storage using no moving parts.It is sometimes called semiconductor storage device, solid-state device and solid-state disk (despite not having a disk-shaped part such as in a hard disk drive (HDD) or a floppy disk).
- 20 MB (2.5-in form factor)
- Storage Technology Corporation
- 1991; 32 years ago
- SanDisk
The first production IBM hard disk drive, the 350 disk storage, shipped in 1957 as a component of the IBM 305 RAMAC system. It was approximately the size of two large refrigerators and stored five million six-bit characters (3.75 megabytes)[18] on a stack of 52 disks (100 surfaces used).[26] The 350 had a single arm with two read/write heads ...
- December 24, 1954; 68 years ago
- Details
- Handling
- Frequency
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Bad sectors can be "soft" (logical) or "hard" (hardware, physical), depending on what is making the sector inaccessible. In case of power loss, bit rot (more likely on floppy disks), or firmware issues, the on-disk format can be corrupt beyond what the error correcting codecan fix. This is a "soft" bad sector: writing over the corruption would succ...
Operating system
Bad sectors may be detected by the operating system or the disk controller. Most file systems contain provisions for sectors to be marked as bad, so that the operating system avoids them in the future. Disk diagnostic utilities, such as CHKDSK (Microsoft Windows), Disk Utility (on macOS), or badblocks (on Linux) can actively look for bad sectors upon user request. With the advent of SMART-enabled disk controllers (see below), the burden of avoiding bad sectors more commonly falls to the disk....
Disk controller
When a sector is found to be bad or unstable by the firmware of a disk controller, a modern (post-1990) disk controller remaps the logical sector to a different physical sector. Typically, automatic remapping of sectors only happens when a sector is written to – failed reads remain marked "pending". In the normal operation of a hard drive, the detection and remapping of bad sectors should take place in a manner transparent to the rest of the system and in advance before data is lost. There ar...
Manipulation methods
The Windows program ATATool can be used to create deliberate "soft" bad sectors by manipulating the sector Error correction code(ECC) data. This can be used to verify bad sector support in disk utilities and forensic tools. For instance, to make sector 10 bad: hdparm has a --make-bad-sector command that works similarly. For newer drives, it can alternatively use WRITE_UNCORRECTABLE_EXTto "flag" a sector as bad: the drive controller would not attempt to read, but fail immediately.
In a 2007 study, CERN observed 1.53 million hard drives from 30 models over 32 months and analyzed the drive read errors returned. They noted that 3.5% of drives developed "latent read error" (i.e. unreadable bad sector), and that a disk with a bad sector is more likely to develop more. Bad sectors cluster spatially (in a 10–MB neighborhood) and te...
Into Temptation is an independent drama film written and directed by Patrick Coyle. It tells the story of a prostitute—played by Kristin Chenoweth (pictured) —who confesses to a Catholic priest ( Jeremy Sisto) that she plans to kill herself. The priest attempts to find her, and in doing so involves himself in the darker side of society.
Immaculate is a 2024 American psychological horror film directed by Michael Mohan, written by Andrew Lobel, and co-produced by Sydney Sweeney, who also stars in the film alongside Álvaro Morte, Benedetta Porcaroli, Dora Romano, Giorgio Colangeli, and Simona Tabasco. The plot focuses on a young woman of devout faith, who is invited to reside ...
Rick and Morty is an American adult animated science fiction sitcom created by Justin Roiland and Dan Harmon for Cartoon Network's nighttime programming block Adult Swim.The series follows the misadventures of Rick Sanchez, a cynical mad scientist, and his good-hearted but fretful grandson Morty Smith, who split their time between domestic life and interdimensional adventures that take place ...
