At Sun, 25 Oct 2026 21:41:25 +0100, Henryk Paluch <hpaluch%seznam.cz@localhost> wrote: Subject: Re: Most simple filesystem with content checksums? > > Please note, that Linux offers also 3rd > method - integritysetup(8) - it works on > block level - device mapper - (basically > adding metadata with checksums for each > block - to make it space efficient, these > metadata blocks are "clustered" (grouped > metadata for several blocks until they > fill whole block). Integritysetup allows > checksums for complete filesystems that do > not have them (like ext4 that added > metadata checksums but not data > checksums). > > Curious if, for example, RAIDframe could > do something similar? RAIDframe already does checksum protection when configured to do so. That's what RAID-5 _is_. What's missing in RAIDframe is a background daemon that will occasionally scan the volume to detect and repair bitrot. Many more modern so-called "hardware" RAID controllers have such a feature. However there's also the logical volume manager, LVM, which might actually be how the Linux "dm-integrity" feature is also implemented. Using LVM and the device mapper to implement something equivalent to the linux "dm-integrity" feature would be a great idea! It would be far more flexible than just using RAIDframe. -- Greg A. Woods <gwoods%acm.org@localhost> Kelowna, BC +1 250 762-7675 RoboHack <woods%robohack.ca@localhost> Planix, Inc. <woods%planix.com@localhost> Avoncote Farms <woods%avoncote.ca@localhost>
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