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: If a portion of a solid block is damaged, it can potentially affect all files within that same block.

-ms=off : Disables solid mode for faster individual file access. backup.7z

: Because similar data patterns across different files are compressed together, solid archives significantly reduce file size, especially for backups containing many small or similar files. : If a portion of a solid block

-ms=2g : Limits solid blocks to 2GB to balance compression and access speed. 7z(1) — p7zip-full — Debian stretch -ms=2g : Limits solid blocks to 2GB to

The "solid" feature in a file refers to Solid Compression , a method where 7-Zip treats multiple files as a single continuous data block.

: Modifying or deleting a file within a solid archive is more resource-intensive because the entire solid block must be rebuilt. How to use it

When creating a backup, this feature provides several benefits and trade-offs: