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Just a thought - that may be the write speed but the elapsed time to
complete the sync may vary depending on the bs. I have noticed that
when trying to back-up a drive. This is a non-tech noob comment :-)<br>
<pre class="moz-signature" cols="72">From:
Sandeep Johri</pre>
<div class="moz-cite-prefix">On 2025-09-03 03:35, William Park via
kwlug-disc wrote:<br>
</div>
<blockquote type="cite"
cite="mid:8d1fa0bc-62d6-4084-a46a-ad20bf29ddda@yahoo.ca">
<br>
<br>
On 2025-09-03 02:28, Chris Frey wrote:
<br>
<blockquote type="cite">On Tue, Sep 02, 2025 at 10:40:54PM -0400,
William Park via kwlug-disc wrote:
<br>
<blockquote type="cite">for i in {4,16,64,256}K {1,4,16,64}M; do
<br>
echo ==== $i ====
<br>
dd if=/dev/sda of=/dev/sdi bs=$i
<br>
sync
<br>
done
<br>
<br>
No difference. All did 117MB/s.
<br>
</blockquote>
<br>
Cool test.
<br>
<br>
What about CPU load? What about syscall load?
<br>
</blockquote>
<br>
I didn't look for those. I just ran it in single user mode with
read-only filesystem,
<br>
telinit 1
<br>
mount -o remount,ro /
<br>
...
<br>
and went to sleep. :-)
<br>
<br>
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</blockquote>
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