A simple tool to check md5 checksums on systems with limited primary and slow secondary storage like tape storage.

It will read checksum files created by md5sum and from there try to open (and thus trigger recall of) and check as many files as possible within a given size limit. An optional release command can be given, to be executed after a file was completely red.

This will try to read the file md5sum in the current directory and check files therein.

md5check

md5check 1902??/md5sum --limit 700 --release "ivdfile --release"

This will try to read the files md5sum in the subdirectories fitting the pattern 1902?? in the current directory and check files therein.

• at no point in time will be more than 700G active in the primary filesystem
• the command ivdfile --release will be called on finished files

In case of problems with GLIBC on ancient Linuxes try a fully static build.

rustup target add x86_64-unknown-linux-musl
cargo build --target x86_64-unknown-linux-musl