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Date: Sat, 16 Jun 2012 18:06:26 +0200 (CEST)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: Pieter de Goeje <pieter@degoeje.nl>
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Cc: freebsd-hackers@freebsd.org, d@delphij.net
Subject: Re: BIO_DELETE equivalent for file on FFS filesystem
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>>
>> i could write simple program to find out what blocks are unused and
>> then...do nothing.
>
> Actually you can. Use dd if=infile of=outfile conv=sparse to convert a file to a
> sparse file. This obviously only works on filesystems supporting sparse files,
> such as UFS.

of course i can by copying. not really what i want

>
> Regards,
> Pieter
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