| A | B |
|---|
| Power Supply | source of power for the drives |
| Tracks | Concentric circles on disks |
| Sectors | pie-shaped wedges on disks |
| Read/Write Head | How data is written to and read from the disk |
| Cluster | one or more sectors that are the smallest units allocated for a file |
| MBR | master boot record |
| FAT | file allocation table |
| Format | prepares a disk for use |
| 1st step in formatting | erases any data that already has been written to the disk |
| Dos boot record | MBR |
| Two hidden files that must be present on dos formatted disk | IO.SYS & MSDOA.SYS |
| What message appears if command.com is not on disk | non-system disk or disk error |
| Fragmented File | file not stored in consecutive clusters |
| Cluster chain | Determines all cluster locations for a file on a disk |
| Root Director | contains a fixed number of rows to accomodate a predetermined number of files and subdirectories |
| c:\Format c: | writes tracks and sectors on the disk and creates a master boot record, an empty file allocation table, and an empty root directory on c drive |
| Internal Dos Commands | part of the COMMAND.COM program and don't require command.com to find and load another program file |
| External Dos Commands | stored as separate program files in the dos director. Command.com must search for and load these program files |
| Label | Changes the volume label or electronic name on a disk |
| Chkdsk | creates a status report of a disk and it can repair lost clusters in the fat |
| Format /v | allows you to enter a volume label only once when formatting several disks |
| Format /s | Stores the system files on the disk after formatting |
| Format /q | Recreates the root director and FATS |
| Format /U | Allows for an unconditional format of the drive |
| Scandisk | checks for lost and cross-linked clusters as well as defragments the drive and does a surface scan for bad sectors |
| DEL | Deletes files |
| ERASE | Erases files |
| Command for erasing all files in the A:\DOCS directory | c:\ERASE a:\DOCS\*.* |
| Undelete | attempts to recover files that have been deleted |
| Recover | attempts to recover a file from damaged sectors on a disk |
| Diskcopy | makes an exact duplicate (sector by sector) of one disk |
