Subject: Re: Addiind a new filesystem support
To: None <>
From: Luke Mewburn <>
List: tech-kern
Date: 05/05/2002 22:36:46
On Fri, May 03, 2002 at 05:11:42PM -0400, Bill Sommerfeld wrote:
  | > FFS is 64bit and has been for a long time.
  | Well, sort of.  it can handle files larger than 2^32 bytes, but it's
  | not fully 64-bit.  
  | FFS still uses 32-bit block pointers, which causes it to max out at a
  | filesystem size of 2^41 or so.

2^40 IIRC (31 bits, because it's unsigned).  Try:
	newfs -N -s 1023g -F somefile
(or, if you want "somefile" to be a "holey" file with all the metadata,
remove the -N)

  | Commodity disks now exceed 2^37 bytes.  We've got less than 4 bits of
  | headroom.

Yes.  We could try larger sector sizes, but I think that causes other
problems at this time.