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|
| [3] |
Re-creating the Image |
| [3.0] |
What is an SFV, why do I need it, how
is it used, and where do I get it? |
SFV (San Francisco Verification) programs uses a cyclic-redundancy check
algorithm to calculate a unique binary "fingerprint" for a
given file. In ABCDI, a poster is encouraged to generate an SFV file
containing the unique codes for each file posted. The details of how the
algorithm works are beyond the scope of this FAQ, suffice it to say that
if the fingerprints of two files match, the likelihood that the files
are byte-for-byte identical is very high.
It is Requested that all posters in this group post at least
one validation report during the course of the post (often with the .NFO
file or "0" file) so make sure to get this as well. By
effectively comparing your file with theirs you can easily locate any
trouble sectors you may have within your collection.
Download Quick SFV
1.61.exe
QuickSFV (by Mercedes) is one of several handy SFV file generators
and checkers. The link above will get you a copy of version 1.61, the
current version as of this writing (06/01/2000)
It Is Requested that you include SFV validation in your upload; it
only takes a very short time, and in the long run will help everyone
and possibly save wasted parts being uploaded. It is also Requested the
poster validate the .iso/.bin file as well.
|
| [3.1] |
What is JAR and how do I use it? |
JAR is Yet Another Compressor for DOS and is a lot like ARJ. In fact, it
is written by the same person. If you type jar32 /? at a command prompt
you will find info on the myriad options JAR supports. Further
information and copies of JAR may be obtained at http://www.arjsoftware.com.
(Note June 2000- JAR is not used in ABCDI- this, any references to
it are left in for compatibility with the earlier verions of the FAQ
only.) |
| [3.3] |
I'm used to RAR having parts with
extensions like .R13, but what is .S03? Do I need to learn ANOTHER
compression program? |
No, its not as bad as that <g>. When RAR gets over 100 parts in an
archive it changes the extension from .Rxx to .Sxx and keeps going. In
fact, after another 100 it goes on to .Txx as well.
Never fear, when it comes time to uncompress the archive RAR will
know to go from .R99 to .S00 and onwards without you having to do a
thing.
Also, some archives have a .RAR extension for the first file, and
others have a .000 extension with all the subsequent files having purely
numeric extensions- not to worry- those archives were made with RAR
also- just a different version. RAR knows how to deal with them just as
well as the archives that begin with .RAR and have alpha-numeric
extensions. |
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