[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] File sink causes "S" errors
From: |
Seth David Schoen |
Subject: |
Re: [Discuss-gnuradio] File sink causes "S" errors |
Date: |
Tue, 5 Oct 2010 22:18:21 -0700 |
User-agent: |
Mutt/1.5.20 (2009-06-14) |
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 <address@hidden> | Qué empresa fácil no pensar en
http://www.loyalty.org/~schoen/ | un tigre, reflexioné.
http://vitanuova.loyalty.org/ | -- Borges, El Zahir
- [Discuss-gnuradio] GNU Radio roadmap, Pandeya, Neel L., 2010/10/05
- [Discuss-gnuradio] File sink causes "S" errors, Thomas Hobiger, 2010/10/05
- Re: [Discuss-gnuradio] File sink causes "S" errors, Josh Blum, 2010/10/05
- Re: [Discuss-gnuradio] File sink causes "S" errors, Thomas Hobiger, 2010/10/06
- Re: [Discuss-gnuradio] File sink causes "S" errors, Nick Foster, 2010/10/06
- Re: [Discuss-gnuradio] File sink causes "S" errors,
Seth David Schoen <=
- Re: [Discuss-gnuradio] File sink causes "S" errors, Thomas Hobiger, 2010/10/06
- Re: [Discuss-gnuradio] File sink causes "S" errors, Thomas Hobiger, 2010/10/06
- Re: [Discuss-gnuradio] File sink causes "S" errors, Josh Blum, 2010/10/06
- Re: [Discuss-gnuradio] File sink causes "S" errors, Thomas Hobiger, 2010/10/06
- Re: [Discuss-gnuradio] File sink causes "S" errors, Jared Casper, 2010/10/06
Re: [Discuss-gnuradio] File sink causes "S" errors, Marcus D. Leech, 2010/10/05
Re: [Discuss-gnuradio] File sink causes "S" errors, Marc Epard, 2010/10/06
Re: [Discuss-gnuradio] GNU Radio roadmap, Tom Rondeau, 2010/10/09