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<div class="moz-cite-prefix"><font face="Tomson Talks">Alex Korobkin
wrote on 2026-08-21 11:32:<br>
</font></div>
<blockquote type="cite"
cite="mid:CA+3RNfi+4r0hfRtW6yjAbNT88wFbTm0UfuP_gGerxKUkAdWo4w@mail.gmail.com">pv
./disk.img | dd of=/dev/sdb1<font face="Tomson Talks"><br>
</font></blockquote>
<p><font face="Tomson Talks">I saw that YSAP video William linked to
and it reminded me I really should get in the habit of using it.</font></p>
<p><font face="Tomson Talks"><br>
</font></p>
<p><font face="Tomson Talks">I did a test similar to the quoted line
above and was surprised by the results - `pv` was *way* slower:</font></p>
<p><font face="monospace">pv
~/Downloads/ISOs/neon-user-20250727-0745.iso | dd of=/dev/null<br>
2.72GiB 0:00:30 [90.1MiB/s]
[=================================>] 100%<br>
5709824+0 records in<br>
5709824+0 records out<br>
2923429888 bytes (2.9 GB, 2.7 GiB) copied, 30.9357 s, 94.5 MB/s</font></p>
<p><font face="monospace">dd
if=~/Downloads/ISOs/neon-user-20250727-0745.iso of=/dev/null<br>
5709824+0 records in<br>
5709824+0 records out<br>
2923429888 bytes (2.9 GB, 2.7 GiB) copied, 1.17249 s, 2.5 GB/s</font></p>
<p><font face="Tomson Talks"><br>
</font></p>
<p><font face="Tomson Talks">That makes no sense to me.</font></p>
<p><font face="Tomson Talks">Oh, it's caching, a second try with
`pv` shows it only slightly slower than `dd`: 2.3 GB/s vs 2.5
GB/s:</font></p>
<p><font face="monospace">pv
~/Downloads/ISOs/neon-user-20250727-0745.iso | dd of=/dev/null<br>
2.72GiB 0:00:01 [2.12GiB/s]
[=================================>] 100%<br>
5709824+0 records in<br>
5709824+0 records out<br>
2923429888 bytes (2.9 GB, 2.7 GiB) copied, 1.28682 s, 2.3 GB/s</font></p>
<p><font face="Tomson Talks"><br>
</font></p>
<p><font face="Tomson Talks">New tool unlocked, if only I can
remember to actually *use* it!</font></p>
<p><font face="Tomson Talks"><br>
</font></p>
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