[dm-crypt] aes-xts-plain with aes_x86_64 makes my SSD 5x slower than my encrypted HD

Heinz Diehl htd at fancy-poultry.org
Tue Jul 24 18:48:20 CEST 2012


On 24.07.2012, Marc MERLIN wrote:

> So I know it doens't make sense, but apparently it's SSD/machine
> sensitive and for me the default of 256 is enough for the block 
> device, but not enough for a dm-crypt'ed device.

I guess this has nothing to do with what kind of drive you have, but
the real blocksize of the device. Conventional drives with 512/512 are
fine with the default, but advanced format and SSD-drives which run
with a 4k blocksize need more..



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