home *** CD-ROM | disk | FTP | other *** search
- NAME
- BackMan -- backs up your data.
-
- INPUTS
- DRIVE/K - drive name(s), as DF0:, PC0:, etc.
- Doesn't need trailing colon, but will be truncated at the first
- colon if present (i.e. you could say "DF0:foo" if you really
- wanted to).
-
- DEVICE/K - name of trackdisk-like Exec device (say, scsi.device).
- The device must support the TD_GETGEOMETRY command to work with
- BackMan. Almost any trackdisk-like device will do, but if you get
- unlikely disk sizes it probably lacks full support of the command
- in question (for example, diskspare.device 1.6 will say it can
- hold something like 512 Mb per disk).
-
- However, avoid naming the device itself and stick to the standard
- DOS drive name if possible (DFx: for trackdisk.device, PCx: for
- mfm.device, etc.), because the interface is much more reliable.
-
- NOCOM/S - don't backup/restore file comment.
- Especially useful when restoring files to a MS-DOS® disk or
- partition handled by CrossDOS® (or similar), since the MS-DOS®
- file system doesn't support comments and you would get a "Can't
- set comment" error for every file that has a comment. Can also
- save some memory and disk space if you don't need to backup
- comments and your files have them.
-
- NOTE: this options refers to files' comments, while the next
- refers to the global backup comment. Don't confuse the two.
-
- COM=COMMENT/K - backup comment.
- This comment will be shown every time the backup is read.
-
- By default, the comment will be set to the name of the drawer
- being backed up.
-
- KEYS
- You can stop (pause) and restart BackMan by pressing CTRL-E and
- CTRL-F, respectively. You can abort BackMan by pressing CTRL-C.
-
- NOTES
- The secondary file list
- ~~~~~~~~~~~~~~~~~~~~~~~
- On backup, BackMan will write the file list twice: once at the
- beginning of the backup and once again at the end. In this way you
- will have a chance of recovering your backup, should the first file
- list be corrupted by chance or by mistake.
-
- On restore, if you insert the last disk of a backup when asked for
- the first, then BackMan will ask you if you want to read the file
- list from that disk: you can safely do so if you want, but you will
- do one disk swap more than if you read the file list from the first
- disk.
-
- Please note that the secondary file list could actually start on the
- last but one disk: in this case BackMan will request the correct
- disk. This can happen because there could be just a little bit of
- space left on the last but one disk, but not enough to contain the
- whole file list, so it will be split between the last two disks.
-
- The secondary file list could actually start on even earlier disks if
- your backup contained an extremely large number of files (more than
- 3128 files in the worst case, usually over ten thousands). In this
- case it will span more than two disks.
-
- Existing files
- ~~~~~~~~~~~~~~
- When you are asked for a new file name (if you selected to rename an
- already existing file), you can select the Cancel button of the
- "Enter new name" requester to skip the file in question.
-
- CMD_FORMAT or CMD_WRITE?
- ~~~~~~~~~~~~~~~~~~~~~~~~
- By default BackMan writes data to disk using TD_FORMAT for DOS
- drives, while it will use CMD_WRITE for Exec devices. This behaviour
- is meant to speed up floppy disk operations (TD_FORMAT is quite
- faster than CMD_WRITE on floppy disks), while it is better suited for
- direct writes to hard disks, removables, or non-floppy data storage
- peripherals in general (SyQuest drives and tape drives, for example),
- which sometimes don't like being formatted. However, this logic is
- not perfect, so you can force the use CMD_WRITE by unselecting the
- "Format" checkmark in the configuration window.
-
- BackMan has been tested with trackdisk.device, ramdrive.device,
- mfm.device (as supplied with WB 3.1), diskspare.device (public
- domain, formats standard DD disks to 960 or 984 kb),
- ?compressdisk.device?
-
- NOTE FOR THE NOVICE USER: forget about all this, DON'T try to backup
- your data to hard disks and DON'T use direct Exec device access
- (except as instructed for tape drives) unless you are absolutely sure
- of what you're doing. You could lose the data you're backing up and
- much more by improper use of these options.
-
- WARNINGS
- It is the user's responsibility to prevent any changes to the files
- being backed up in the time interval from when the directory is read
- to when the file is effectively backed up on disk, tape, or whatever.
- Any changes would result in more or less inconsistent data being
- written to the backup, particularly if the file size is changed.
- BackMan will notice changes in file size and abort the backup (no
- recovery would be possible, except rewriting most of the backup from
- the beginning), but other, although less relevant, changes to the
- file attributes will deliberately go unnoticed.
-
- If you are really really paranoid, I'd suggest to make a backup copy
- of the first and/or last backup disks, because these two disks
- contain the main and secondary file lists: in this way you will be
- more protected against corruption of said lists, without whom it is
- impossible to restore the backup.
-
- BackMan can't handle backups of more than about 2 gigabytes of data.
- But then, is there anybody out there who backs up 2 Gb in a single
- shot? ;) (If you're curious, it would take over 2383 DD disks...)
-
- diskspare.device has proven to be not very reliable when used through
- the DEVICE option, so please avoid using it in this way and stick to
- DRIVE after mounting the appropriate DOS driver.
-
- ESOTERIC SUGGESTIONS
- If you want to transfer data between two nearby computers without
- setting up some kind of network and you choose BackMan, you don't
- need to do the whole backup: you need just one disk, though it would
- be better to have a couple more so you can backup on one computer and
- restore on the other at the same time. Simply start BackMan on both
- computers, and move the disks from one computer to the other as soon
- as they're finished. You have to set the "Ignore contents" option on
- the computer that is doing the backup, otherwise it will reject the
- disks because they belong to the current backup.
-
- NO WARRANTY
- THERE IS NO WARRANTY, EITHER EXPRESSED OR IMPLIED, AS TO THE QUALITY
- OR PERFORMANCE OF THIS PROGRAM. THE ENTIRE RISK FOR THE USE OF THIS
- PROGRAM IS ASSUMED BY THE USER (YOU). THE AUTHORS MAY NOT BE HELD
- RESPONSIBLE FOR ANY LOSS OR CORRUPTION OF DATA, EQUIPMENT OR OTHER
- GOODS RESULTING BY THE USE OR POSSESSION OF THIS PROGRAM, EVEN IF IN
- KNOWLEDGE THAT SUCH LOSS OR CORRUPTION MIGHT HAPPEN.
-
- However, the authors dedicated themselves to ensure that the program
- will behave very likely as described in this manual and that it does
- not contain evident flaws. It has been continuously and thoroughly
- tested throughout development, and it has proven to be reliable in
- everyday use. The authors are willing to maintain the program and
- correct misbehaviours, though they cannot make any promises on this.
-
- In other words, we did our best to write a reliable backup program
- and in fact we rely on it enough to use it for our very own backups,
- but we wrote enough programs to know that there is always another
- bug, no matter how good the programmer is. Be careful the first times
- you try a program like this, which will be responsible of keeping
- your data safe, and start using it for important backups only after
- you've acquired a certain feeling on it.
-
-