[comp.os.vms] File Extents

rod@CHEETA.ISI.EDU (Rod Van Meter) (08/08/87)

	Well, I mailed out my program that tells about disk fragmentation
based on the bitmap file. Anybody who didn't get a copy but requested one,
or just decided they wanted a copy, let me know.

	On to the next topic. How can I find out how many pieces a file
is in on the disk? Am I going to have to read file header garbage to
do that? This could be ugly...

	I'm not sure how relevant that info would be anyway. Most of
our disks are RA81s on an HSC50. There a Logical Block differs from a
Physical Block, right? Am I correct in surmising that the number of
pieces the file headers say it's in has nothing to do with how many
seeks it would taketo read the file? I'm a little unclear on this.
Anything anyone can add on this topic would be a big help.

	--Rod