Re: Abysmal disk performance, how to debug?

[Elladan]

You guys are making this harder than it needs to be.  Try this:

sync 	# To make sure nothing else is writing
dd if=/dev/zero of=file bs=1M count=1024 oflag=dsync

You'll get reasonable numbers this way out of dd.

-J

On Sat, Jan 27, 2007 at 02:43:04PM -0500, Bill Davidsen wrote:
> What you want is this:
>   sync;
>   time bash -c "dd if=/dev/zero of=/tmp/1GB bs=1M count=1024; sync"
> which will actually time the write with the time command.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/