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- Short: A compressing disk device v37.8; uses XPK
- Uploader: rhialto@mbfys.kun.nl (Olaf Seibert)
- Type: util/pack
-
- RCSId: $Id: README,v 1.5 1995/04/08 20:23:48 Rhialto Exp $
-
- Overview
- ********
-
- `xpkdisk.device' is an exec-style device that looks like
- trackdisk.device and similar disks. The difference is that it compresses
- its data and stores it in multiple files in an existing filesystem.
-
- * Version 37.8 works around a horrible bug that is really caused by
- XPK when track files are not compressible. Look in the source
- file "devio.c" for details, near the symbol XPKBUG.
-
- The bug was pointed out to me by Ulrik Jensen <uj2001@hdc.hha.dk>.
-
- * Fixes a bug in xdClear which assumed that all partitions started
- at track 0.
-
- The bug was pointed out to me by Michael Barsoom
- <mbars@bluejay.creighton.edu>.
-
- * You can now change the XPKD: assign on the fly, if you're careful.
-
- * xdClear now works with the fake scsi.device, which does not seem to
- know about ETD_* commands.
-
- * Now keeps the old track file while writing a new one. The old
- track file is only deleted after successfully writing the new one.
- You have more control about what to do in such situations.
-
- * Now includes a utility to reclaim space from deleted files.
-
- * Now uses a hierarchical track naming scheme for faster access!
-
- * Now behaves better in cace of threatening lack of disk space.
-
- * Now handles read-only media.
-
- It uses the XPK (eXternal PacKer) standard to do the actual
- compression. This has many advantages:
-
- * You can choose which compression is most effective for your
- purpose. For one disk, you might want a very tight compression
- that is slow, for another you may prefer a faster but less
- efficient compression.
-
- * As soon as another XPK library is released, you can use it for your
- compressed disk(s).
-
- * Because each track is a standard XPK-compressed file, you can use
- the normal XPK utilities to uncompress your data, should you wish
- to do so.
-
- * You can change the compression type of a disk on-the-fly. All
- already compressed data remains perfectly usable, but upon
- re-compression your new choice will be used.
-
- * You can even manually decompress and recompress your disk (when
- xpkdisk is not accessing it, of course) with another compression
- method.
-
-
- ============================= Archive contents =============================
-
- Original Packed Ratio Date Time Name
- -------- ------- ----- --------- -------- -------------
- 17982 6993 61.1% 24-May-93 23:34:00 COPYING
- 4344 1843 57.5% 12-Apr-95 01:15:16 device1.a
- 12773 4296 66.3% 08-Apr-95 21:22:16 device2.c
- 27559 7970 71.0% 08-Apr-95 21:22:10 devio.c
- 340 172 49.4% 29-Dec-93 17:49:40 Files
- 4503 1459 67.5% 02-Apr-95 16:01:38 Install-XpkDisk
- 810 421 48.0% 08-Nov-93 12:59:48 Install-XpkDisk.info
- 5531 2239 59.5% 08-Apr-95 21:22:18 magic.c
- 2264 977 56.8% 08-Apr-95 21:22:30 Makefile
- 1938 867 55.2% 08-Apr-95 21:24:36 mkci.c
- 471 299 36.5% 08-Apr-95 21:24:16 Mountfile
- 2084 896 57.0% 08-Apr-95 21:24:28 name.c
- 13378 4533 66.1% 08-Apr-95 21:24:22 prefsmain.c
- 7732 2483 67.8% 29-Dec-93 17:19:18 prefswindow.c
- 5842 1213 79.2% 16-Oct-93 06:11:02 prefswindow.gui
- 985 453 54.0% 16-Oct-93 06:11:04 prefswindow.gui.info
- 2424 656 72.9% 29-Dec-93 17:20:06 prefswindow.h
- 2385 1204 49.5% 08-Apr-95 21:24:04 README
- 4113 1720 58.1% 08-Apr-95 21:24:42 ripcord.c
- 11884 7631 35.7% 08-Apr-95 21:26:20 xdClear
- 14284 4634 67.5% 08-Apr-95 21:24:24 xdclear.c
- 7440 5044 32.2% 08-Apr-95 21:26:14 xdName
- 2210 945 57.2% 08-Apr-95 21:24:30 xdname.c
- 14300 8775 38.6% 08-Apr-95 21:26:10 xdPrefs
- 522 319 38.8% 16-Aug-93 17:55:34 xdPrefs.info
- 12160 7335 39.6% 12-Apr-95 01:15:34 xpkdisk.device
- 35297 12661 64.1% 08-Apr-95 21:26:26 xpkdisk.guide
- : Modified
- 468 221 52.7% 01-Apr-95 16:39:18 XpkDisk.guide.info
- 4895 1918 60.8% 08-Apr-95 21:24:40 xpkdisk.h
- 30527 11933 60.9% 08-Apr-95 21:24:54 xpkdisk.texi
- -------- ------- ----- --------- --------
- 251445 102110 59.3% 12-Apr-95 10:30:56 30 files
-