From owner-freebsd-hackers  Wed Mar 31  8:39:56 1999
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To: thierry.herbelot@alcatel.fr
Cc: bmcgover@cisco.com, questions@FreeBSD.ORG, hackers@FreeBSD.ORG
Subject: Re: MFS Sizes over 470MB? Can't seem to do it... 
In-reply-to: Your message of "Wed, 31 Mar 1999 17:03:46 +0200."
             <37023952.28B139D7@telspace.alcatel.fr> 
Date: Wed, 31 Mar 1999 11:39:31 -0500
From: Brian McGovern <bmcgover@cisco.com>
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[For anyone tuning in late, I'm having a problem specifying MFS file systems
in excess of ~500MB without using -F, and I'm trying to understand why. The
one comment I have received so far is that max MFS size is a function of
total swap space. I'm now disagreeing...]

Actually, it appears swap size is not an apparent function of MFS file systems.
Even at a 2GB of swap, MFSs over 507MB (+/-) won't work unless the -F option
is also given (although I'm not sure of the impact). Therefore, I don't know
if this qualifies as a bug or not...

Device      1K-blocks     Used    Avail Capacity  Type
/dev/da0s1b   1048576     8552  1039896     1%    Interleaved
/dev/da1s1b   1048576     8260  1040188     1%    Interleaved
Total         2096896    16812  2080084     1%


(This should provide 768MB of MFS)
> mount_mfs -s 1572864 /dev/da0s1b /mnt

Filesystem  1K-blocks     Used    Avail Capacity  Mounted on
/dev/da0s1a    127023    18253    98609    16%    /
/dev/da0s1f   7085237   195641  6322778     3%    /usr
/dev/da1s1e   7593397        1  6985925     0%    /usr2
/dev/da0s1e    381103     1719   348896     0%    /var
procfs              4        4        0   100%    /proc
mfs:232        507771        1   467149     0%    /mnt
(Obviously, it doesn't, at 507)

> umount /mnt
(This should provide ~ 1.5GB of MFS)
> mount_mfs -s 3145728 /dev/da0s1b /mnt

Filesystem  1K-blocks     Used    Avail Capacity  Mounted on
/dev/da0s1a    127023    18253    98609    16%    /
/dev/da0s1f   7085237   195641  6322778     3%    /usr
/dev/da1s1e   7593397        1  6985925     0%    /usr2
/dev/da0s1e    381103     1727   348888     0%    /var
procfs              4        4        0   100%    /proc
mfs:249        507771        1   467149     0%    /mnt
(Again, the 507MB cap)

> umount /mnt


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