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Date:      Tue, 19 Mar 2002 20:21:37 -0800
From:      Jaye Mathisen <mrcpu@internetcds.com>
To:        Joseph Gleason <clash@tasam.com>
Cc:        questions@FreeBSD.ORG, stable@freebsd.org
Subject:   Re: Problems with large disk. (> 1 TB)
Message-ID:  <20020319202137.U68606@backmaster.cdsnet.net>
In-Reply-To: <00b401c1cf8d$8960b7c0$090510ac@gleason>
References:  <20020319131556.D99985@backmaster.cdsnet.net> <008901c1cf8c$be5d6f50$090510ac@gleason> <00b401c1cf8d$8960b7c0$090510ac@gleason>

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I misunderstood, I thought the 1TB limit was on the UFS FS itself,
not the disk slice size.

I dont' need a 1 TB FS, I just need/wanted to be able to create
multiple partitions < 1TB on a disk/slice > 1TB in size.

On Tue, Mar 19, 2002 at 04:32:13PM -0500, Joseph Gleason wrote:
> Actually, looks like this has allready been answered.  Check the archives
> for a message with a subject "FreeBSD 1TB filesystem limitation" from Oct
> 2001.
> 
> Unless something has changed, FreeBSD cannot support filesystems 1TB or
> greater.
> 
> 
> ----- Original Message -----
> From: "Joseph Gleason" <clash@tasam.com>
> To: "Jaye Mathisen" <mrcpu@internetcds.com>; <stable@FreeBSD.ORG>
> Cc: <questions@FreeBSD.ORG>
> Sent: Tuesday, March 19, 2002 16:26
> Subject: Re: Problems with large disk. (> 1 TB)
> 
> 
> > I don't have a solution for you, but I am pretty sure I know the problem:
> >
> > calc 2^31*512 = 1TB.
> >
> > disklabel references everything using a unit of 512 byte sectors.  That
> > number of sectors I'm sure is stored as an unsigned int making 2^31-1 the
> > max number of sectors.  Aka, just under a TB is fine, one TB or over is
> bad.
> >
> > So the 32mb dos partition probably made it just under a TB.
> >
> >
> > Maybe someone else knows a solution for this problem.
> >
> > ----- Original Message -----
> > From: "Jaye Mathisen" <mrcpu@internetcds.com>
> > To: <stable@FreeBSD.ORG>
> > Cc: <questions@FreeBSD.ORG>
> > Sent: Tuesday, March 19, 2002 16:15
> > Subject: Problems with large disk. (> 1 TB)
> >
> >
> > >
> > > Trying to disklabel a 1 TB disk (with sysinstall or disklabel)
> > > produces a lot of errors.  In sysinstall, there's a kazillion
> > > overflows and negative offsets, and stuff.
> > >
> > > With disklabel, it tells me that the partition size needs to
> > > be truncated, then writes the label.  then if I run disklabel
> > > again, it takes the truncated size, says it's too big, and
> > > truncates it again.
> > >
> > > Interestingly enough, using DOS FDISK to put a 32MB dos partition
> > > at the beginning of the drive makes it all work fine.
> > >
> > > I am not convinced that I am not missing some space, but I haven't
> > > counted up everything yet.
> > >
> > > In any case, is this supposed to work?  I'll snag a ton of data
> > > if somebody wants to look at it, but I don't want to invest
> > > the time if it's not meant to.
> > >
> > > This is a 8 disk Maxtor 160GB disks in raid 5, on a 3ware
> > > 7850 with the 7.4 release firmware.
> > >
> > > -Stable supped as of 3/19.
> > >
> > > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > > with "unsubscribe freebsd-questions" in the body of the message
> > >
> >
> >
> > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > with "unsubscribe freebsd-questions" in the body of the message
> >
> 

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