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Not seeing that behavior on my media server which is running Debian Bullseye. When I type snapraid -V it returns: snapraid v12.2 by Andrea Mazzoleni, http://www.snapraid.it
Sorry for the false alarm, I thought the warning messages were more serious and I didn't try the next step in the build process. Everything tested properly and working fine.
Ran into trouble during the 'make' process (see below). I followed directions from the Install readme file to extract the archive followed by './configure' and then 'make'. Note: System is running Debian Bullseye cmdline/unix.c: In function ‘filephy’: cmdline/unix.c:579:40: warning: array subscript 0 is outside the bounds of an interior zero-length array ‘struct fiemap_extent[0]’ [-Wzero-length-bounds] 579 | uint32_t flags = fm.fiemap.fm_extents[0].fe_flags; | ~~~~~~~~~~~~~~~~~~~~^~~ In file included...
Ran into trouble during the 'make' process (see below). I followed directions from the Install readme file to extract the archive followed by './configure' and then 'make'. cmdline/unix.c: In function ‘filephy’: cmdline/unix.c:579:40: warning: array subscript 0 is outside the bounds of an interior zero-length array ‘struct fiemap_extent[0]’ [-Wzero-length-bounds] 579 | uint32_t flags = fm.fiemap.fm_extents[0].fe_flags; | ~~~~~~~~~~~~~~~~~~~~^~~ In file included from cmdline/portable.h:129, from cmdline/unix.c:18:...
I did a quick test and didn't really notice a faster scan however I only have four data drives (8TB each) and I expect the benefit of parallel scanning is much greater with more drives in the array.