topic Re: DFU User Guide or Reference manual in Operating System - OpenVMS

DFU User Guide or Reference manual

John A. Beard — Tue, 16 Oct 2007 08:00:21 GMT

Hi folks,

I would be grateful if anyone could point me to a link where I could download / print a DFU User Guide or Reference Manual (if such a thing exists)...

Thanks

John

Re: DFU User Guide or Reference manual

Hein van den Heuvel — Tue, 16 Oct 2007 08:09:36 GMT

google: +dfu +site:.nl

leads to:

http://www.digiater.nl/downloads/dfu032.pdf

Wow, someone actually intending to read the doc! Cool!

Help not good enough?
What problem are you trying to solve?
Be sure to check the doc, but just ask here if need be.

Cheers,
Hein.

Re: DFU User Guide or Reference manual

John A. Beard — Tue, 16 Oct 2007 08:22:41 GMT

Hi Hein,

Thanks for the link...and yes, HELP would probably be more than good enough for a quick fix. I've always been one of those pack-rats who prefers to have a handy hard copy close by to refer to.

I might swing by later and open a new thread if I can't find everything that I'm looking for. The systems I am looking at have had no defragmetation process applied to them for some time. Diskeeper was in place many years ago, but it was disabled for some isses that arrose from it's use with Oracle (before my time here.. cannot expand on it). In a nut shell, I'm just trying to see what I can do to reduce fragmentation and all the nasty things that seem to happen as a result of it.

John

Re: DFU User Guide or Reference manual

Karl Rohwedder — Tue, 16 Oct 2007 08:38:44 GMT

John,

pls. note that DFU (being a VERY useful tool) is no defragmenter. It can defragment single files. The 'real' defragmenter from HP is called DFO (Disk File Optimizer) and its license is called DFG.

regards Kalle

Re: DFU User Guide or Reference manual

Hein van den Heuvel — Tue, 16 Oct 2007 08:47:40 GMT

excellent.

I like the simple 'DFU> report '

and DFU> SEARC/FRAG=MINI=100 ! or 1000 or ...

And, fwiw... I always run with $DEFI DFU$NOSMG yes.

Hein.

Re: DFU User Guide or Reference manual

John Abbott_2 — Tue, 16 Oct 2007 09:00:06 GMT

HP's DFO homepage is
http://h71000.www7.hp.com/openvms/storage/dfopage.html

You can download a run a free fragmentation report from there.

Regards
John.

Re: DFU User Guide or Reference manual

John A. Beard — Tue, 16 Oct 2007 09:02:42 GMT

Thanks to both of you for your advice.

Even after running a single pass on a couple of disks, the health of those disks appears to have improved substantially.

Just taking one volume as an example, the figures show dramatic changes from before -

File fragmentation index : 0.504 (excellent)

Free space fragmentation index : 0.258 (excellent)

I will obviously look at DFO as well

Re: DFU User Guide or Reference manual

John A. Beard — Tue, 16 Oct 2007 09:05:22 GMT

Once again.. thanks to everyone for taking the time to reply