On September 22, 2014 9:18:44 AM EDT, "Carlos E. R." <robin.listas@telefonica.net> wrote:
On 2014-09-22 14:49, Greg Freemyer wrote:
Well for dd anyway you can bypass the cache all together. Adding oflag=direct should do it.
Ok, so that flag and a reasonable bs to compensate.
What about "dsync"? Or "nocache"?
Dsync just makes sure the data is written to disk asap, but it leaves a copy in cache. Not useful for writing an iso to a flash. Nocache probably works, but it first uses the kernel disk cache mechanism, then flushes it. That may or may not solve your issue. Direct eliminates the use of the kernel cache altogether; that seems best for that use case.
Maybe I'll try them to time the results later.
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