Vinum 1TB filesystem limit questions

[Greg 'groggy' Lehey]

On Monday,  8 November 2004 at  1:01:04 -0600, matt virus wrote:
> Hi All -
>
> with some help from people on this list, i managed to get vinum and
> raid5 all figured out!
>
> I had 4 * 160gb raid5 array running perfectly.  When i ventured home
> this past weekend, i found another ATA controller and figured I'd change
> my raid5 array to have 8 drives.
>
> I cleaned the drives, reformatted and labeled to have a nice clean
> start, rewrote my config file and I get this:
>
> ------------------------------
> 2day# newfs -U -O2 /dev/vinum/raid5
> /dev/vinum/raid5: 1094291.2MB (2241108324 sectors) block size 16384,
> fragment size 2048
>         using 5955 cylinder groups of 183.77MB, 11761 blks, 23552 inodes.
>         with soft updates
>
> newfs: can't read old UFS1 superblock: read error from block device:
> Invalid argument

Hmm.  Interesting.  UFS 1 is limited to 1 TB, so the message is
understandable.  But why is it looking for a UFS 1 superblock?  What
happens if you first create a smaller UFS 2 file system (use the -s
option to set the size explicitly to, say, 500 GB), and then repeat
making it for the full size?

Greg
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