7-Zip 9.04 beta Copyright (c) 1999-2009 Igor Pavlov 2009-05-30
p7zip Version 9.04 (locale=en_US.UTF-8,Utf16=on,HugeFiles=on,2 CPUs)
Creating archive The Big Bang Theory 101.avi.7z

Compressing [Content]

Everything is Ok

real 5m28.819s
user 5m27.296s
sys 0m10.397s

7-Zip 9.04 beta Copyright (c) 1999-2009 Igor Pavlov 2009-05-30
p7zip Version 9.04 (locale=en_US.UTF-8,Utf16=on,HugeFiles=on,2 CPUs)
Creating archive The Big Bang Theory 101.avi.7z-ultra

Compressing [Content]

Everything is Ok

real 5m39.774s
user 5m41.589s
sys 0m11.269s
adding: – (deflated 1%)

real 0m31.463s
user 0m28.822s
sys 0m3.528s

adding: – (deflated 1%)

real 0m22.854s
user 0m20.709s
sys 0m2.336s

real 4m54.301s
user 3m50.514s
sys 0m6.512s

real 1m5.008s
user 0m45.999s
sys 0m3.532s
The Big Bang Theory 101.avi

real 5m47.653s
user 4m7.947s
sys 0m7.752s
The Big Bang Theory 101.avi

real 0m38.216s
user 0m34.266s
sys 0m2.716s
total 1.4G
-rwxr-xr-x 1 juk juk 453 2011-01-19 02:43 script.sh
-rw-r–r– 1 juk juk 175M 2011-01-19 02:17 The Big Bang Theory 101.avi
-rw-r–r– 1 juk juk 174M 2011-01-19 02:50 The Big Bang Theory 101.avi.7z
-rw-r–r– 1 juk juk 174M 2011-01-19 02:56 The Big Bang Theory 101.avi.7z-ultra
-rw-r–r– 1 juk juk 173M 2011-01-19 03:01 The Big Bang Theory 101.avi.bz2
-rw-r–r– 1 juk juk 173M 2011-01-19 03:02 The Big Bang Theory 101.avi.gz
-rw-r–r– 1 juk juk 173M 2011-01-19 03:08 The Big Bang Theory 101.avi.tar.bz
-rw-r–r– 1 juk juk 173M 2011-01-19 03:08 The Big Bang Theory 101.avi.tar.gz
-rw-r–r– 1 juk juk 173M 2011-01-19 02:56 The Big Bang Theory 101.avi.zip
-rw-r–r– 1 juk juk 173M 2011-01-19 02:56 The Big Bang Theory 101.avi.zip.2
-rw-r–r– 1 juk juk 64K 2011-01-19 02:55 typescript
-rw-r–r– 1 juk juk 181153356 2011-01-19 03:02 The Big Bang Theory 101.avi.gz
-rw-r–r– 1 juk juk 181153394 2011-01-19 03:08 The Big Bang Theory 101.avi.tar.gz
-rw-r–r– 1 juk juk 181153485 2011-01-19 07:20 The Big Bang Theory 101.avi.zip.2
-rw-r–r– 1 juk juk 181155066 2011-01-19 02:56 The Big Bang Theory 101.avi.zip
-rw-r–r– 1 juk juk 181385682 2011-01-19 03:08 The Big Bang Theory 101.avi.tar.bz
-rw-r–r– 1 juk juk 181385840 2011-01-19 03:01 The Big Bang Theory 101.avi.bz2
-rw-r–r– 1 juk juk 181996177 2011-01-19 02:56 The Big Bang Theory 101.avi.7z-ultra
-rw-r–r– 1 juk juk 181998441 2011-01-19 02:50 The Big Bang Theory 101.avi.7z
-rw-r–r– 1 juk juk 182818448 2011-01-19 02:17 The Big Bang Theory 101.avi
-rw-r–r– 1 juk juk 65536 2011-01-19 02:55 typescript
-rwxr-xr-x 1 juk juk 453 2011-01-19 02:43 script.sh
total 1419076
3bdb5c9c55319c2fc592ad1f79404192c209a4bb The Big Bang Theory 101.avi
$###################################################################
$cat script.sh
#!/bin/bash
ls -l
FILE=”The Big Bang Theory 101.avi”
sha1sum “$FILE”
time cat “$FILE” | 7z a -si “$FILE.7z”
time cat “$FILE” | 7z a -si -t7z -m0=lzma -mx=9 -mfb=64 -md=32m -ms=on “$FILE.7z-ultra”
time cat “$FILE” | zip | cat > “$FILE.zip”
time cat “$FILE” | zip -9 | cat > “$FILE.zip.2″
time cat “$FILE” | bzip2 -9 > “$FILE.bz2″
time cat “$FILE” | gzip -9 > “$FILE.gz”
time tar cv “$FILE” | bzip2 -9 > “$FILE.tar.bz”
time tar cv “$FILE” | gzip -9 > “$FILE.tar.gz”
ls -lh
ls -l | sort
sha1sum “$FILE”
###################################
* GNU zip won *
###################################

( ) /\ _ (
\ | ( \ ( \.( ) _____
\ \ \ ` ` ) \ ( ___ / _ \
(_` \+ . x ( .\ \/ \____———–/ (o) \_
- .- \+ ; ( O \____
(__ +- .( -’.- <. \_____________ ` \ /
(_____ ._._: <_ – <- _- _ VVVVVVV VV V\ \/
. /./.+- . .- / +– – . (–_AAAAAAA__A_/ |
(__ ' /x / x _/ ( \______________//_ \_______
, x / ( ' . / . / \___' \ /
/ / _/ / + | \ /
' (__/ / \/
/ \

I had to sent a .zip file.

Second time it was my personal problem. I reformatted my PC and went to install all my softwares, but to my

horror all files were in the RAR format. I did this to save some space and to protect files from virus.Worse

was that my PC was not having an internet connection.That day I sweared that I will never use WinRAR

especially for my personal & important files.

Also .zip is the favorite format for corporate users which is not the case with .rar.
Adding another point WinZip generated a revenue of US$ 22.7 Million in 2009 whereas nothing has ever

been reported for WinRAR in this regard.
So its clear that WinZip is better ; WinRAR may be popular but only among pirates.

Tar is not a compression application. You will havt to use bzip2 on the tar archive at the same time or after to see the actual compressed archive. Please rerun your test and publish your results again.

original .iso is 650mb……….

ZIP: took about 3 min and shrunk it to 400mb.

TAR: took 7 min and didn’t make any any difference in size at all….

7ZIP: took about 5 min and shrunk it to 370mb!

Have not tried RAR yet.

concerning data recovery there is always par / par2. In my opinion this is much better than built in recovery options.

Look here for more info:
http://parchive.sourceforge.net/

Olaf