Paul writes:
> A minor detail here: label table can have multiple extent blocks (each
> extent block holds upto 20 extents).  Giving the fact that each label table
 
interesting...I know there *was* a limitation of 20 blocks, possibly due to
early coding time limits?, on the label table...even though the data structures
would have allowed a chain of arbitrary length.  I'd been told it was
due to limitations on the code "mapping" the Label Table to a virtual
address range during bootup, maybe.
 
> extent must be exactly .75 MB, just 20 extents would severely limit the
> number of files we can have on a disk.
 
That may be theory...but I've certainly seen systems whose label
table extents differ dignificantly from .75MB.  I just checked 2 user's
machines, and found extents only of about 3 MB.  The first extent in each
case was 769 pages, and the others 768 pages (one page = 4,096 bytes).
 
BTW, I can't tell how many extents my file has now...I'm emailing from home,
and the machine running the "add an extent" utility seems to have died :(
I'll report why, when I find out.
 
--
Stan Sieler                                          [log in to unmask]
                                     http://www.allegro.com/sieler.html