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The extrapolation presumes a constant rate of fill and may approach the top throughput available, <BR>
and doesn't account for archiving and removal that may be going on.<BR>
<BR>
a virus that copies a 513byte file infinitely will fill your drive as quickly as one <BR>
producing 1023byte files because of the sector size issue, won't it? <BR>
Hard drives do not fill uniformly, but mostly fill 512byte blocks. <BR>
The index may or may not accurately show the files number and size filled.<BR>
<BR>
-----Original Message-----<BR>
<B>From</B>: Sean McNealy <<A HREF="mailto:Sean%20McNealy%20%3csean.mcnealy@gmail.com%3e">sean.mcnealy@gmail.com</A>><BR>
<B>Reply-to</B>: Atlanta Linux Enthusiasts - Yes! We run Linux! <ale@ale.org><BR>
<B>To</B>: Atlanta Linux Enthusiasts - Yes! We run Linux! <<A HREF="mailto:Atlanta%20Linux%20Enthusiasts%20-%20Yes!%20We%20run%20Linux!%20%3cale@ale.org%3e">ale@ale.org</A>><BR>
<B>Subject</B>: Re: [ale] A little math<BR>
<B>Date</B>: Wed, 10 Feb 2010 12:14:49 -0500<BR>
<BR>
<PRE>
Testing to a file on my machine (no raid going on)
512000000 bytes (512 MB) copied, 81.1661 s, 6.3 MB/s
extrapolation: 1TB @ 6.3 MB/s is 44 hours. Wow, that is a long time.
I forget the relevant specs for this machine, but for comparison
copying that same 512MB file was:
512000000 bytes (512 MB) copied, 7.091 s, 72.2 MB/s
And... now I'm out of entropy!
-Sean
On Wed, Feb 10, 2010 at 11:35 AM, Scott Castaline <<A HREF="mailto:skotchman@gmail.com">skotchman@gmail.com</A>> wrote:
> Okay I've got a dumb question for you math types. How long should it
> take to fill a 1TB hdd with random data using
> "dd if=/dev/urandom of=/dev/sd"? I've done some more searching and found
> some numbers and if I figured them right I'm looking at about 8 days. Is
> this accurate?
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