Panic while creating UFS fs on vn(4) for initrd
matthias at dragonflybsd.org
Mon Oct 4 23:34:39 PDT 2010
* Matthew Dillon wrote:
> Hrm. I don't think you can create an 8 TB UFS1 filesystem. The
> limitation for UFS is 2TB, and even that might be a bit dangerous
> because ufs uses 32 bit filesystem block numbers. Theoretically
> it is based on the UFS frag which is usually 1K or 2K, and negative
> block numbers are used to index meta-data, so (2^31) * 1K = 2TB.
I didn't try to do that :) I just run "mkinitrd" to create a new
initrd, that's all. According to the script it creates a 15 MB vn(4)
> I don't quite know why it crashed... the VCHR is missing its cdev
> pointer (it is NULL for some reason), but it could be related to the
> size of the backing store you tried to create the UFS filesystem with.
Do not have the exact numbers here, but IIRC about 40GB.
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