[DRBD-user] Re: Re: [DRBD user] HELP ... Primary becomes StandAlone.

[Lars Ellenberg]

/ 2006-06-21 16:30:35 +0200
\ Regis Gras:
> Lars Ellenberg wrote:
> 
> >since the sda6 is a multiple of 4kB, too,
> >we don't need to round down the offset.
> >so I'd say, to wipe out the meta data, you do
> >
> >perl -e '$offset = sysseek STDOUT, -(128*1024*1024), 2;
> >	die unless $offset == 58538276*1024;
> >	$zero = "\x00" x 1024;
> >	syswrite(STDOUT,$zero) == 1024 or warn "oops? $!";
> >	' > /dev/sda6
> 
> Thak you very much for your help.
> 
> I do'nt well known Perl, but I understand what you write.
> 
> But this script doesn't work.
> 
> [dionysos]-root# perl -e '$offset = sysseek STDOUT, -(128*1024*1024), 2;
> >die unless $offset == 58538276*1024;
> >$zero = "\x00" x 1024;
> >syswrite(STDOUT,$zero) == 1024 or warn "oops? $!";
> >' > /dev/sda6
> Died at -e line 2.

try die "$!\n"  instead...
sysseek returns the new position, or the undefined value
if the seek did not work.

maybe dd does work, instead?
 dd if=/dev/zero bs=1024 seek=58538276 count=1 of=/dev/sda6

-- 
: Lars Ellenberg                                  Tel +43-1-8178292-0  :
: LINBIT Information Technologies GmbH            Fax +43-1-8178292-82 :
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