#51 zip size limitation at 2 or 4 gig ?

I tried to use 7-zip to zip a group of files
which include a 7 gig file.

I got an unexpected error immediately.

The zip format was selected.

I switched to gz format, and now it is
proceeding, apparently successfully.

I wonder if there is a limit on total or individual
file size with the .zip format. I believe that winzip
has a total archive size limitation -- I don't know
if this would be the same limitation.

Anyway, if there is such a limitation that you know of,
it would be nice to add it to the help file under formats
perhaps.

Cordially,

Perry

[Igor Pavlov]

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Zip format has 2 (or 4 Gb) max file_size limitation .
So don't use zip, if you have such big files.
Use 7z instead. It allows to compress up to
16000000000 GB.

[Anonymous]

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7zip is not so good as a storage format, because only
machines with 7zip can read it, but .tar.gz is good
because machines with 7zip can read it, and so can
machines with winzip, and so can machines with winace.

But anyway, I was trying to say that it would be nice
to mention this limitation in the documentation, if you ever
have time.

[Christian Blackburn]

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Hi Perry,
Although I could be wrong, I don't think this is a limitation of
either the ZIP or 7Z format in and of itself. My guess is you
tried one format on a Fat32 or Fat16 partition and then the
other on a NTFS partition. NTFS allows single files to be
larger than 4GB. That's a file system issue and not a
problem endemic to 7-Zip. Although if a user tags anything
larger than 4GB worth of files on an non NTFS partition a
warning should be issued, so that should also be part of this
bug :). On Fat16 I believe the max file size limitation is
2047MBs.
Cheers,
Christian

[Anonymous]

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I only have NTFS.

I speculate that you closed this bug because you guessed
(wrongly) that I have FAT-16 or FAT-32. In which case I
suppose I should reopen it ?

[Anonymous]

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I don't know if I should reopen this or not, but I'm pretty
confident that FAT-16 or FAT-32 are not very involved, as I
don't have them :)

I guess I'll reopen it; obviously you can close it if you want.

[Igor Pavlov]

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I don't plan to implement >4GB for zip in nearest time.

[Christian Blackburn]

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Hi Perry,
I assume you had chosen to use .zip and now .gz, because the
.7z format takes to long to compress? I just wanted to make
sure that you were aware that it has the best compression
ratio of all the formats supported by 7-zip, hence the name
:). No need to reply if you already knew that.
Cheers,
Christian

[Anonymous]

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All I meant with this bug was to suggest (and perhaps this
should be RFE instead of bug ?) that you add a line in the
help under General Information/Zip that 7-zip only supports
up to 4G (or whatever the limit is) with Zip format. Eg,
perhaps (simply quoting ipavlov's comment below on
2002-11-09 12:59):

Zip format has 2 (or 4 Gb) max file_size limitation.

[Christian Blackburn]

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16 Billion GB that's a whole lotta porn :).
-Christian Blackburn

[Anonymous]

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But porn is such a fuzzy word -- all these backups of MS SQL
Server that I'm doing -- it might be a close vote as to
whether that word applies to them :)

[David Balažic]

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It would also be nice that instead of "unexpected error" it
would say "file xxx is larger than 4GB, ZIP archives do not
support files larger than 4GB".

[Igor Pavlov]

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I'll try to add big file support later.

[Christian Blackburn]

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Hey Puddle,
>But porn is such a fuzzy word -- all these backups of MS SQL
>Server that I'm doing -- it might be a close vote as to
>whether that word applies to them :)

I'm not here to judge, whatever floats your boat :).
-Christian Blackburn

[jokerdm]

I guest it's solved.

[aONe]

This was ever fixed?

[aONe]

I'm able to extract zips > 4GB created with 7zip, not created with macOS bundled compressor. Can share an example if needed.