Re: Problem using dd within bash script

[Bernhard Voelker]

On 04/28/2014 05:01 PM, Pádraig Brady wrote:
> Note the kernel may cache lots more than 4M before it
> even starts writing out to the device.
> I think there maybe some very recent improvements
> to the kernel to address at least the excessive
> caching part of the issue, though if there are
> large pending writes to slow devices the kernel
> can still block for a long time.

Okay, that sounds reasonable.
I.e., in average the blocking time could be smaller,
but if many writes are pending to be flushed to disk
as in this case, then ~1min is reasonable for a slow
device.

Thanks & have a nice day,
Berny