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Date:      Tue, 24 Feb 2004 08:30:15 +0100
From:      Danny Carroll <danny@dannysplace.net>
To:        Greg 'groggy' Lehey <grog@FreeBSD.org>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Help with Vinum disk crash...
Message-ID:  <1077607815.7l8mfcl97gso@mailsrv.dannysplace.net>
In-Reply-To: <20040224001635.GM87020@wantadilla.lemis.com>
References:  <00ed01c3f559$d7f1ac20$8052260a@capgemini.nl> <20040217223827.GM33797@wantadilla.lemis.com> <1077093269.15aypd5fp76s@mailsrv.dannysplace.net> <20040218111653.GB289@marvin.home.local> <1077106518.yyrhxqeampw@mailsrv.dannysplace.net> <20040218140429.GG289@marvin.home.local> <1077180395.4prky8v4skqo@mailsrv.dannysplace.net> <20040219222221.GA88317@marvin.home.local> <20040223043113.GV87020@wantadilla.lemis.com> <1077536659.61xvlite2kso@mailsrv.dannysplace.net> <20040224001635.GM87020@wantadilla.lemis.com>

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> We already discussed this.  The likelihood of such far-reaching damage
> is low.
>

Hmmm ok..

> > I can't prove any of this since I urgently needed about 150gb of
> > space.  So I re-formatted.
> >
> > Like I said it is a shame since I wanted to understand what happened
> > now, but, then again, I was looking for an excuse to change back
> > from vinum to normal.
>
> To be honest, I don't know what else we could have done, since you
> haven't supplied the information I asked for.
>

I know and I am sorry for that.  It was just bad timing.  I asked for help and
then within 24 hours found that I needed a lot of storage really fast.  I had
to make a decision whether or not to figure out what went wrong or to get on
with the task as hand.

> > vinum and ide on my system results is very poor disk performance, I
> > see a 10-fold increase in read/write actions.  I'll be interested in
> > revisiting vinum with some SCSI disks sometime soon.
>
> How did you test it?

I have 4 ata133 ide disks, all identical.  They run off a promise ata133 io
card.

With vinum, all 4 disks are accessed at pretty much the same time, no matter
what you do.   Without, you only access the disk that you are writing to.  It
goes a lot faster but I have to manage my data usage more.

I dont blame vinum, I blame my ide subsystem.

-D



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