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  2. Abort, Retry, Fail? - Wikipedia

    en.wikipedia.org/wiki/Abort,_Retry,_Fail?

    In CP/M, attempting to read a floppy disk drive with the door open would hang until a disk was inserted and the disk drive door was closed (very early disk hardware did not send any kind of signal until a disk was spinning, and a timeout to detect the lack of signal required too much code on these tiny systems). Many users of CP/M became ...

  3. Data loss - Wikipedia

    en.wikipedia.org/wiki/Data_loss

    Upon realizing data loss has occurred, it is often best to shut down the computer and remove the drive in question from the unit. Re-attach this drive to a secondary computer with a write blocker device and then attempt to recover lost data. If possible, create an image of the drive in order to establish a secondary copy of the data.

  4. Hard disk drive interface - Wikipedia

    en.wikipedia.org/wiki/Hard_disk_drive_interface

    Enhanced Small Disk Interface (ESDI) was an attempt to minimize controller design time by supporting multiple data rates with a standard data encoding scheme; this was usually negotiated automatically by the disk drive and controller; most of the time, however, 15 or 20 megabit ESDI disk drives were not downward compatible (i.e. a 15 or 20 ...

  5. Data corruption - Wikipedia

    en.wikipedia.org/wiki/Data_corruption

    Data scrubbing is another method to reduce the likelihood of data corruption, as disk errors are caught and recovered from before multiple errors accumulate and overwhelm the number of parity bits. Instead of parity being checked on each read, the parity is checked during a regular scan of the disk, often done as a low priority background process.

  6. Floppy disk drive interface - Wikipedia

    en.wikipedia.org/wiki/Floppy_disk_drive_interface

    Input 28 WPT# Write Protect 0=Write Protect Input 30 RDATA Read Data Input 32 HDSEL#/SIDE Head Select / Side select Two uses, see application or use for details. [clarification needed] (Side select:1=Side 0/0=Side 1) Output 34 DSKCHG# Disk Change 1=Disk Change/0=Ready Input 3 RSVD Reserved No connection or connect to the ground 5 N/C No connection

  7. TestDisk - Wikipedia

    en.wikipedia.org/wiki/TestDisk

    TestDisk is a free and open-source data recovery utility that helps users recover lost partitions or repair corrupted filesystems. [1] TestDisk can collect detailed information about a corrupted drive, which can then be sent to a technician for further analysis.

  8. Data Carrier Detect - Wikipedia

    en.wikipedia.org/wiki/Data_Carrier_Detect

    Data Carrier Detect (DCD) or Carrier Detect (CD) is a control signal present inside an RS-232 serial communications cable that goes between a computer and another device, such as a modem. This signal is a simple "high/low" status bit that is sent from a data communications equipment (DCE) to a data terminal equipment (DTE), i.e., from the modem ...

  9. Floppy-disk controller - Wikipedia

    en.wikipedia.org/wiki/Floppy-disk_controller

    A floppy-disk controller (FDC) is a hardware component that directs and controls reading from and writing to a computer's floppy disk drive (FDD). It has evolved from a discrete set of components on one or more circuit boards to a special-purpose integrated circuit (IC or "chip") or a component thereof.

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