RE: Using DVD-RAM drive

["Hall, Philip" <phall@xxxxxxxx>]

Charles,

> SAVLIB  DTACPR(*YES):  18 min  (795.27MB on DVD)
> SAVLIB  DTACPR(*NO) : 105 min  (3.27GB on DVD)
> SAVLIB DEV(*SAVF) DTACPR(*YES)
> SAVSAVFDTA          : 49   min  (2.14 GB on DVD)
>
> Anybody know why this is not the case?

Ah, it's all to do with density.

In the worst case (105 min) the compression is also the worst - the DVD drive 
is having trouble convincing the bits and bytes to stay bunched up, were they 
are told to go and a lot of time is spent shuffling the data back to it's right 
place - akin to a shepherd with sheep in a large field without a sheep dog; 
it's difficult for him to bunch the sheep together in one place and it takes 
him numerous tries and a long time (105 mins).

In the next case (49 mins) the compression has improved, so the DVD drive 
doesn't need to work so hard to keep the bits & bytes in place - akin to our 
shepherd having a sheep dog to help him bunch the sheep together, it take him 
less time and the sheep can be bunched closer together.

In the final case (18 mins) the compression is much better and thus the DVD 
drive has little (or less) problem telling the bits and bytes to stay where 
they are told to stay - akin to our shepherd having a sheep dog to help him, 
and a sheep pen to hold the sheep in one place.

Simple really.



--phil


And if you believe that, I have both a bridge *and* some prime Florida real 
estate you might be interested in taking off of my hands.... :-) :o)