> In fact, in many filesystems there are very weak – or no! – guarantees that > the data you're reading is actually correct. Systems like ext4 simply assume > that the data written to the disk will never change. AFAIK, it has > essentially no mechanism at all to deal with silent data corruption.
It's not fair to say there's "no mechanism at all to deal with silent data corruption". The hard-disk/ssd does checksum every block. If a block fails a checksum the disk keeps trying until it reads a block that matches the checksum, else gives up with a read-error. So really it's a matter of whether you trust your drives to do their job correctly. -- Joseph Graham; a tech-rights advocate, an Englishman and a Catholic. My PGP key: 0x8cd7227da467d3ed404f6eefdb590f739e5ac458 I have three blogs: - my blog about the ethics of technology: http://www.technologicallyadvancedhuman.uk - my blog about computing and electronics: http://www.naughtycomputer.uk/ - my blog about scooters and cafe reviews: http://cafereview.xylon.me.uk I write software: https://www.suckmore.uk/ I run a platform to publish Free Software success stories: http://www.freedcomputer.net I run a public Taskenizer installation: https://taskenizer.xylon.me.uk
