home *** CD-ROM | disk | FTP | other *** search
-
-
- BAC (Backup Directory) John Dickinson
- Command Magazine, Vol 4, No 17
- Copyright 1985 Ziff-Davis Publishing Company
- _______________________________________________________
-
- Purpose: Backs up all (or selected) files in a
- directory to hard or floppy disks, permitting
- disk changes when target disks become full.
-
- Format: BAC [d:][path]filename[.ext] [d:][path]
-
- Remarks: Unlike the DOS COPY command, BAC.COM permits
- you to change (formatted) target disks when
- backing up files to disk. Furthermore, it
- only backs up files whose date stamp is later
- than those of identically named files on the
- target disk. Unlike BACKUP, BAC does not
- change the setting of the archive bit. Also,
- files copied with BAC.COM are fully usable at
- all times; they do not need first to go
- through a RESTORE process.
-
- BAC.COM supports the use of global (* and ?)
- characters in filenames and extensions. It
- does not, however, permit you to REName files
- during copying.
-
- Example: You are working at a PC AT with a hard disk
- drive (C:) on which you keep your copy of
- BAC.COM, and you want to back up all the .DOC
- files stored on a 1.2-Mb floppy disk (drive
- A:) onto regular 360K disks (drive B:).
- Since these .DOC files will require
- approximately 600K, you must have two
- formatted blank floppy disks ready to use in
- drive B:. From the C> prompt you enter
-
- BAC A: *.DOC B:
-
- When the first target disk in drive B: is
- full, you will be prompted to change disks.
-
- Notes:
-
- 1. BAC.COM compares the date stamps of
- identically named files and will not
- overwrite a newer version with an older
- one. This may cause files to be skipped
- if you omit to keep your date/time
- current.
-
- 2. Requires DOS 2.0 or later.
-
-
-
-