We're writing a new disk driver and are able to use newfs to lay down a ufs 
filesystem. I can write small files using something like echo >. However, if I 
create a file of, say, 2048 bytes and then use dd to copy it from one file to 
another then I crap out with stuff like this:

panic[cpu1]/thread=30000bf5a20:
assertion failed: cgp->cg_frsum[j] >= 0, file: ../../common/fs/ufs/ufs_alloc.c, 
line: 948

or

assertion failed: fraglist[siz] >= 0, file: ../../common/fs/ufs/ufs_subr.c, 
line: 1490

What type of things should we be looking for with this type of error?

Neale
 
 
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