Subject: Re: newfs can't make filesystems over 1TB in size
To: Brian Buhrow <>
From: Jaromir Dolecek <>
List: current-users
Date: 12/06/2002 11:18:55
This is well-known limit of current FFS. You need to use bigger
block size and/or frag size to get around this. You should be able to
have up to 4TB filesystem.

There appears to be some info regarding this on
perhaps also elsewhere on NetBSD site.


Brian Buhrow wrote:
> 	Hello folks.  In trying to newfs my newly working
> 2TB 3ware escalade system into action, I'm confronted with the message:
> Preposterous size from newfs.  
> A check of the code shows that it checks to see if the fssize variable,
> which reflects the total number of sectors in a filesystem, is negative.
> If it is, it prints this message and exits.  The fssize varible is a signed
> 32-bit integer, meaning newfs won't make filesystems larger than 2^31
> sectors in size.
> 	My questions are these:
> 1.  If I change fssize's type from int to
> long long, I believe newfs will work.  However, does the kernel have the
> same limitation?
> 2.  Is there a different solution I should consider which folks have
> already tried?
> 3.  If #1 is the correct solution, should I send-pr it?
> -thanks
> -Brian

Jaromir Dolecek <>  
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