Panic when using 4096/512 filesystems

[Tom Vijlbrief]

I'm trying to use a disk which I formatted with:

newfs -i 4096 -c 32 -b 4096 -f 512

I can fsck and mount the disk with no problems but as soon as I do an ls
on the mounted disk the system panics:

panic: segmap_unlock

Do others use non standard filesystems and have they encountered this bug?
Thanks for any suggestions !

Tom Vijlbrief
TNO Institute for Perception		Phone: +31 34 63 562 11
P.O. Box 23				Fax:   +31 34 63 539 77
3769 ZG  Soesterberg			E-mail: tom at izf.tno.nl
The Netherlands				or: uunet!hp4nl.nluug.nl!tnosoes!tom