#422 Can't archive large file

[Robert Taylor]

Hello,

I need some help; I have been using 7-zip to compress about 27GB of data with subfolders before sending it across the internet as a backup from a hosted server.

The other day I needed to restore a file, so I pulled out my backup and went looking for the file. It was missing from the backup. I have a log that shows the file was there before compressing the files into one big file to ship across the internet.

When I started comparing the log to the files listed in the archive I started noticing that large files where missing from the archive. Can you please tell me what is the largest file size that 7-zip will compress or if there is a switch that I can set to tell it to archive these large files.

Note: the size of the file that I needed to restore is 325,842KB

Also, please note that 7-zip didn’t indicate that it skipped theses files.

Here is the line of code that I use to create the 7-zip file

"C:\Program Files\7-Zip\7z.exe" a -SFX -r "C:\DDI_COMPRESSED_SFX_PART1\DDI_BACKUP_PART1-%filedate%.exe" .

7-Zip Version 19.00 (x64)
2019-02-21

If you have any questions, please email at

[Igor Pavlov]

1) 7-Zip can skip file, if the file was locked by another app that writes it. But it must be in log and errorlevel will be nonzero.
2) big sfx archive will not work at extraction, if you will run big exe file (2 GB+). But it's not important at stage of archive creation.
3) it's better to use 7-Zip 21.07 instead of 7-Zip 19.00. But I suppose that 19.00 also must work correctly.

[Robert Taylor]

Thank you for answering.

I understand that if another app is using the file that it will be skipped but we are talking a lot of files. This batch file is ran at night around 11:00pm when no body should be using the system.

Does 7-zip have a file size limit? Because every file it skips is big like the example.

Also, I will install the newer version of 7-Zip too.

[Igor Pavlov]

There are no file size limits in 7-Zip for such cases.