Re: [Discuss-gnuradio] File sink causes "S" errors

Nick Foster writes:

> > > dd if=/dev/zero of=/SSD/test.bin bs=1000K count=1000
> > 1000+0 records in
> > 1000+0 records out
> > 1024000000 bytes (1.0 GB) copied, 9.76347 s, 105 MB/s
> >
>
> Try /dev/random instead of /dev/zero. SSDs are known to use data
> compression algorithms to run-length-encode drive data on the fly, to
> increase bandwidth and reduce data replication on the drive. It's
> possible that your drive is performing write optimization on your test
> which is not applicable to the real world.

If you want a speed benchmark you probably want /dev/urandom instad
of /dev/random, because /dev/random will block when it runs out
of high-quality random numbers.

--
Seth David Schoen <schoen@loyalty.org> | Qué empresa fácil no pensar en
http://www.loyalty.org/~schoen/ | un tigre, reflexioné.
http://vitanuova.loyalty.org/ | -- Borges, El Zahir

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