to...@tuxteam.de wrote: > On Fri, Feb 09, 2024 at 07:50:18AM -0500, Stefan Monnier wrote: > > So, if you want to use `badblocks`, you may want to do it on an > > encrypted partition (that covers the whole device) rather than on the > > raw device. > > This is an interesting idea. I haven't wrapped my head around "what if > the controller maps several block addresses to the same physical block"? > > Perhaps you'd have to fill the disk and check afterwards?
Blocks are very likely to be 128KB, sometimes 64KB. I would (I have, in the past) generate a non-random but mostly incompressible large file -- a compressed movie is pretty good for this -- use md5sum to get its hash, and then write it under a variety of names until I fill the disk. Then read back each file and compare the md5sum of each file to the known value. They should be all the same. I found a bad RAID controller this way. -dsr-
