On Wed, Sep 24, 2025 at 01:46:26PM +0200, Nicolas George wrote: > Hi. > > I am in the market to buy a pair of non-identical ≥ 10 tera-octets hard > drives to use as mdadm RAID1. There this info floating around that some > large hard drives use a technology named “SMR” and are bad for RAID. Find out. SMR [1] are bad for nearly anything (write-wise) but being filled up in big chunks, since overwriting something usually means overwriting one of those big chunks. Things might be better given the right application (e.g. backups) and possibly the right kind of file system (e.g. log-structured). Cheers [1] https://en.wikipedia.org/wiki/Shingled_magnetic_recording -- t
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