On 2021-05-15 at 16:19, Bob Bernstein wrote: > As noted, is there a minimum bs size for dd?
Yes: 1. dd will not accept a block size of 0, never mind a negative block size. You can try it yourself: $ dd if=/dev/zero of=/tmp/1zerobyte bs=1 count=1 1+0 records in 1+0 records out 1 byte copied, 0.000117071 s, 8.5 kB/s That said, block sizes below a certain value will give you reduced performance et cetera; what that value is depends on the physical characteristics of the underlying hardware. -- The Wanderer The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man. -- George Bernard Shaw
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