newfs limits? 10TB filesystem max?
Bernd Walter
ticso at cicely12.cicely.de
Sun Feb 20 00:05:26 GMT 2005
On Sat, Feb 19, 2005 at 04:16:37PM -0600, Eric Anderson wrote:
> Wilko Bulte wrote:
> >On Fri, Feb 18, 2005 at 09:12:16AM -0600, Eric Anderson wrote..
> >
> >>Matthew Jacob wrote:
> >>
> >>>BTW- be careful with very large filesystems on FreeBSD- at some point
> >>>fsck can't check them.
> >>>
> >>>I built a sparse 5000TB filesystem which newfs'd and mounted okay, but
> >>>was not possible to check with fsck.
> >>
> >>5000TB?!?! How did you do that?
> >
> >
> >Note the word 'sparse' :)
>
>
> That doesn't explain it much.. Is there a doc on how to create these sparse
> filesystems?
Creating sparse files, e.g. by using dd, is prety much unix basics.
And via md(4) you can get a disk type device from a file.
testdisk=/tmp/testdisk
dd if=/dev/zero bs=512 count=1 oseek=2m of=${testdisk}
mdev=`mdconfig -a -t vnode -f ${testdisk}`
I don't know if md(4) works with such large disks, but it's very likely
that is does.
--
B.Walter BWCT http://www.bwct.de
bernd at bwct.de info at bwct.de
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