home *** CD-ROM | disk | FTP | other *** search
-
-
-
- S - PACK
-
-
- One programme for all your file-packing requirements. Uses include
- HD-backup, archiving, preparing programmes/data/texts for data transfer or
- distribution on floppies.
-
- Special features are:
-
- o Unbeatable compression. Produces smaller backups, archives, packs, than
- ANY other programme, with the possible exception of Meixner's SHRINK, on
- which S-PACK's compression is based.
-
- o Produce single or multi-disk packs.
-
- o Packs can be self-unpacking.
-
- o Output is in the form of normal files on normal disks.
-
- o Can transfer files of any size to floppies - such as those multi-megabyte
- animations - and rejoin the sections on unpacking.
-
- o Single files can be extracted from multi-file packs.
-
- o Unpacks to ram, harddisk, or floppy.
-
- o Content index always available.
-
- o In the event of a disk defect or corruption of a pack there is a REAL
- possibility that the bulk of data can be recovered.
-
- o Does not need any special libraries or handlers.
-
- o Small enough (28K) to be kept in your C directory.
-
- o OS1.3, OS2, OS3.
-
- The price to be paid for these is that S-Pack is slower than some
- dedicated Archivers and HD Backup programmes, and that the facilities
- are relatively scanty. Some comment on these may be useful.
-
- FACILITIES.
-
- The facilities included are those that I NEED; facilities that are merely
- a minor convenience are excluded. I never do partial or incremental backup
- or restore, inclusion of filenotes and the dozens of other options in most
- archivers are of no concern to me - or, I suspect, most people. If there
- is an option which YOU find essential please let me know. I will include it
- if it can be done without producing incompatability between versions.
-
- SPEED.
-
- Comparisons given by programme writers are always highly suspect; the
- most trustworthy figures are those you get when trying out the programme on
- your own setup. However . . .
-
- A4000/040, backing up a 11Mbyte HD partition to floppy, including a small
- allowance for setting up & changing disks:
-
- Programme Backup Restore Disks note
-
- BRU 20 mins 20 mins 15 1
- HDBackup 21 mins 19 mins 19 2
- A-BACKUP 16 mins 15 mins 9
- BACKUP 16 mins 15 mins 8
- LHA 20 mins 9 mins 6.8 3
- S-PACK 17 mins 16 mins 5.5 4
-
- notes: 1 BRU is of course called by HDBACKUP, but offers compression opts
- 2 no compression
- 3 provided that you have paid $US20 for the registered version
- 4 the remainder of the 6th disk is available for use.
-
- The `restore' speed of LHA should be noted - although one always hopes
- that the backup will never need to be restored!
-
- The time figure for S-Pack must be qualified in two ways:
-
- When writing normal files to floppies, speed is heavily dependant on
- the "Addbuffers" figure. In this test I used a figure of 500 but
- anything over 100 should give reasonable results.
-
- The compression method used is a fair bit slower than those used by the
- other programmes. On the A4000 this is not serious, but it will become
- a lot more obvious on slower machines.
-
-
- DATA TRANSFER
-
- When preparing a set of files for data transfer, particularly by modem, the
- best packer/archiver is the one that reduces the size of the data the most.
- The self-unpacking capability will remove any worry as to whether the data
- can be unarced or unpacked by a recipient.
-
-
-
- S-Pack has been developed and thoroughly tested on a 4000/040, and checked
- out as far as possible on a 500 (OS1.3) without a hard disk. It should be OK
- on any other system. I would however advise that you test it thoroughly on
- YOUR system before committing the critical task of backing-up your harddisk
- to it.
-
- I have not been able to check whether it will back up to, and recover from
- tape, and would greatly appreciate it if someone with the necessary equipment
- could test it and let me know the result.
-
-
- Chas.
-
-