The BDOS handled some of the buffering of data from the diskette, but before CP / M 3.0 it assumed a disk sector size fixed at 128 bytes, as used on single-density 8-inch floppy disks.
32.
"' GUID Partition Table "'( "'GPT "') is a standard for the layout of the partition table on a physical logical block addresses ( LBA ) and size information on a traditionally 512 byte disk sector.
33.
"Rotational latency " ( sometimes called " rotational delay " or just " latency " ) is the delay waiting for the rotation of the disk to bring the required disk sector under the read-write head.
34.
With the standard hard disk sector size of 512 bytes, this gives a maximum of 32 KiB cluster size, thereby fixing the " definitive " limit for the FAT16 partition size at 2 GiB for sector size 512.
35.
Such an operating system would raise the level of abstraction for developers and users, so that individual computers, file systems and networks become unimportant to most computations in the same way that processor registers, disk sectors, and physical pages are today.
36.
Such an operating system would raise the level of abstraction for developers and users, so that individual computers, file systems and networks become unimportant to most computations in the same way that processor registers, disk sectors and physical pages are today.
37.
Resident viruses overwrite interrupt handling code or other functions, and when the operating system attempts to access the target file or disk sector, the virus code intercepts the request and redirects the control flow to the replication module, infecting the target.
38.
A BIOS boot partition is needed because GPT uses the disk sectors immediately following the Master Boot Record ( MBR ) to hold the actual partition table, whereas the traditional MBR-based partitioning scheme does not designate them for any special purpose.
39.
Furthermore, the complexity of the medium makes it difficult to write a useful boot program in one sector, even though optical media sectors are typically 2048 bytes each, four times the standard 512-byte size of floppy and legacy hard disk sectors.
40.
A disk controller that caches writes in memory presents the appearance to the operating system that the drive is writable, and uses the memory to ensure that the operating system sees changes to the individual disk sectors it attempted to overwrite.
