Bittorrent Fedora Core 2 MD5 failures?

[William Stearns]

Good afternoon, Ted,

On Thu, 20 May 2004, Ted Roche wrote:

> > Head's up to anyone considering using bittorrent to download FC2. 
> > After 48 hours of happy up- and down-loading, I have disks 1 - 4 
> > failing the MD5 test, although the rescue disk appears to be okay <g>.
> >
> > I was hoping that it might just be a problem like a padded-out packet, 
> > but I haven't seen this happen before with an identical setup: I use 
> > an old W2K box running the bittorrent GUI and then ftp the resultant 

	ftp - did you specify binary mode?  If not, the ftp client may try 
to convert all "line feeds" in the iso's to crlfs.  Or the other way 
around, can't remember.  That might explain the corruption.

> > files off that box. But booting from the CDs and running the linux 
> > mediacheck resulted in "FAIL" messages for the four disks.
> >
> > Anyone got suggestions for an ISO repair kit? Or am I SOL?

	You're not SOL at all.  This is what rsync lives for.  :-)

	Follow the _rsync_ instructions I gave in my 5/18 message 
"Subject: Fedora core 2 ISO's available" and point rsync at the same 
directory where the current images are (you may have to play with the 
paths a bit until rsync is working on your incomplete images).  Once rsync 
has found them, let it run uninterrupted (*); it will pull down any blocks 
that are missing or corrupted from my server (and I've checked those 
checksums and those match).
	If all works well, you should have a repaired set of 4 iso's in 
less than 20 minutes.
	Cheers,
	- Bill

* Yes, it is the case that rsync can restart if interrupted.  The catch is
that if it is interrupted, it throws away whatever input file it was
working on (the mostly complete ISO you gave it) and keeps the partial
image it has.  If you hit ctrl-c, you may end up with, say, a 75M perfect
image and lose the blocks in the 660M imperfect one.

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	"Like a fish, one should look for holes in the net."
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William Stearns (wstearns at pobox.com).  Mason, Buildkernel, freedups, p0f,
rsync-backup, ssh-keyinstall, dns-check, more at:   http://www.stearns.org
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