[Coco] Some OS9 Questions

[Bob Devries]

Gene,

setting the SAS to 255 will certainly help *if* the file is created once and 
never extended again. However, if the file is continuously opened, extended 
and closed again, as you do with directories, would that not still result in 
fragmentation?

--
Regards, Bob Devries, Dalby, Queensland, Australia

Isaiah 50:4 The sovereign Lord has given me
the capacity to be his spokesman,
so that I know how to help the weary.

website: http://www.home.gil.com.au/~bdevasl
my blog: http://bdevries.invigorated.org/

----- Original Message ----- 
From: "Gene Heskett" <gene.heskett at verizon.net>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Monday, July 30, 2007 1:27 PM
Subject: Re: [Coco] Some OS9 Questions


> On Sunday 29 July 2007, Bob Devries wrote:
>>I think that the usual style of defragmentation, that is, splitting of 
>>files
>>into fragments, is fairly unusual on hard discs with a coco.
>>
>>However, the splitting up of directories, which after all, is just another
>>file, does happen frequently.
>>
>>Also, if related files are scattered across the disk, this will also slow
>>down the reading.
>>
>>My $0.02
>>
>>--
>>Regards, Bob Devries, Dalby, Queensland, Australia
>>
>>Isaiah 50:4 The sovereign Lord has given me
>>the capacity to be his spokesman,
>>so that I know how to help the weary.
>>
>>website: http://www.home.gil.com.au/~bdevasl
>>my blog: http://bdevries.invigorated.org/
>>
>>----- Original Message -----
>>From: "Mark McDougall" <msmcdoug at iinet.net.au>
>>To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
>>Sent: Monday, July 30, 2007 10:46 AM
>>Subject: Re: [Coco] Some OS9 Questions
>>
>>> Joel Ewy wrote:
>>>> I think a good disk defragmenter would make a
>>>> good project for somebody.
>>>
>>> Interesting - I would've thought that with a Coco, given the fact that a
>>> HDD can move data much faster than the Coco can process, plus the fact
>>> that (I would _imagine_) most files aren't going to be very big, that
>>> fragmentation isn't going to be a performance factor at all?!?
>>>
>>> Quite willing to be proven wrong...
>>>
>>> Regards,
>>>
> Fragmentation on a hard drive can be reduced considerably by permanently
> setting sas=FF in the disk descriptor using dmode as part of the startup, 
> or
> the appropriate byte can be adjusted in the bootfile with dEd, but be sure
> to 'v'erify the file before rebooting or you just hosed the bootfile.
>
> This will cause any file allocation to be given a contiguous 255 sectors 
> when
> a file is opened for writing.  The system will give the unused portion 
> back
> when the file is closed.
>
>>> --
>>>
>>> |              Mark McDougall                | "Electrical Engineers do 
>>> it
>>> |  <http://members.iinet.net.au/~msmcdoug>   |   with less resistance!"
>>>
>>> --
>>> Coco mailing list
>>> Coco at maltedmedia.com
>>> http://five.pairlist.net/mailman/listinfo/coco
>>
>>--
>>Coco mailing list
>>Coco at maltedmedia.com
>>http://five.pairlist.net/mailman/listinfo/coco
>
>
>
> -- 
> Cheers, Gene
> "There are four boxes to be used in defense of liberty:
> soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> Do unto others before they undo you.
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco