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Re: Unusable system during dd to USB block device
armihu%gmail.com@localhost (Arto Huusko) writes:
>The transfer did work, but it was excruciatingly slow, under 2 Mb /
>sec. But that wasn't the only problem: it also made most other
>activities on the system unusable, at least if there was any disk
The block devices pass things through the traditional buffer cache
which adds lots of overhead and splits everything into small I/O
fragments. The cache is also flooded with stale data, making it
completely useless and everyone else has to compete with your
mass I/O requests.
Michael van Elst
"A potential Snark may lurk in every tree."
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