7-Zip for Linux

Re:7-Zip for Linux by agurk on Thursday March 11, 2021 @02:47PM (#26428198)

I was about to reply a little snarkily that I was doing this with zip archives on floppy disks back in the 90s. I thought I might as well check my facts before posting, and it looks like that was a part of WinZip that was not part of the standard.

In 2015 ISO published a standard pertaining to zip archives, and one of the specifications was (from Wikipedia):

  Archives may not span multiple volumes or be segmented.

There are also multiple forum posts when you search for multipart zip archives of Linux users asking how to decompress them, suggesting that this is only WinZip behaviour and not common to the zip standard.

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Re:7-Zip for Linux by marcodiego on Thursday March 11, 2021 @04:53PM (#26429484)

I remember people using arj exactly because of that feature. Compression with arj was worse than zip but people used it because you could divide an arj archive in floppies. At the time, rar could do it too, but it only got popular later.

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Re:7-Zip for Linux by diggernet on Thursday March 11, 2021 @04:10PM (#26429047)

I had the same reaction, but checked a different set of facts than you did. PKZIP 2.04g (which at the time was the standard) supported split archives, in January 1993. WinZip added support in version 8.1, in 2001.

Edit: I just found the page where you got your quote. Looks like ISO was deliberately defining a subset of ZIP.

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