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Zero-byte files may arise in cases where a program creates a file but aborts or is interrupted prematurely while writing to it. Because writes are cached in memory and only flushed to disk at a later time ( page cache ), a program that does not flush its writes to disk or terminate normally may result in a zero-byte file.
A hard disk drive failure occurs when a hard disk drive malfunctions and the stored information cannot be accessed with a properly configured computer. A hard disk failure may occur in the course of normal operation, or due to an external factor such as exposure to fire or water or high magnetic fields , or suffering a sharp impact or ...
A block, a contiguous number of bytes, is the minimum unit of storage that is read from and written to a disk by a disk driver.The earliest disk drives had fixed block sizes (e.g. the IBM 350 disk storage unit (of the late 1950s) block size was 100 six-bit characters) but starting with the 1301 [8] IBM marketed subsystems that featured variable block sizes: a particular track could have blocks ...
In computing (specifically data transmission and data storage), a block, [1] sometimes called a physical record, is a sequence of bytes or bits, usually containing some whole number of records, having a maximum length; a block size. [2] Data thus structured are said to be blocked.
The last modification date stamp (and with DELWATCH 2.0+ also the file deletion date stamp, and since DOS 7.0+ optionally also the last access date stamp and creation date stamp), are stored in the directory entry with the year represented as an unsigned seven bit number (0–127), relative to 1980, and thereby unable to indicate any dates in ...
A cluster is the smallest logical amount of disk space that can be allocated to hold a file. Storing small files on a filesystem with large clusters will therefore waste disk space; such wasted disk space is called slack space. For cluster sizes which are small versus the average file size, the wasted space per file will be statistically about ...
Dataset creation date (binary) one byte for year of century and two bytes for day-of-year 56: 3: Dataset expiration date (same format as creation date) 99365 indicates that this dataset will never expire. 59: 1: Number of extents for this dataset (binary) 60: 1: If this dataset is a partitioned dataset this is the number of bytes used in the ...
4 bytes: Revision number of header - 1.0 (00h 00h 01h 00h) for UEFI 2.10 12 (0x0C) 4 bytes: Header size in little endian (in bytes, usually 5Ch 00h 00h 00h or 92 bytes) 16 (0x10) 4 bytes: CRC32 of header (offset +0 to +0x5c) in little endian, with this field zeroed during calculation 20 (0x14) 4 bytes: Reserved; must be zero 24 (0x18) 8 bytes