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Re: dd (coreutils) 5.97 used power of 10 not 2 for calculating MB
From: |
Eric Blake |
Subject: |
Re: dd (coreutils) 5.97 used power of 10 not 2 for calculating MB |
Date: |
Mon, 22 Jan 2007 20:09:27 -0700 |
User-agent: |
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.9) Gecko/20061207 Thunderbird/1.5.0.9 Mnenhy/0.7.4.666 |
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According to Dat Head on 1/22/2007 11:20 AM:
> dd if=/dev/zero of=/dev/null count=100 bs=1024k
> 100+0 records in
> 100+0 records out
> 104857600 bytes (105 MB) copied, 0.00933139 seconds, 11.2 GB/s
> ---------------------------^^^ should be 100 MB (or was this done on
> purpose to
> match disk manufacturers lies!?)
Thanks for the report. According to 'dd --help', "MB 1000*1000, M
1024*1024", so the result matches documentation. However, some of the
coreutils (such as ls) support --human-readable vs. --si to choose between
power of 10^3 and power of 2^10, maybe it would be worth adding such an
option to dd.
Also, you may want to consider upgrading - the latest stable version is 6.7.
- --
Don't work too hard, make some time for fun as well!
Eric Blake address@hidden
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