Digital BW, The Print

Paul D. DeRocco wrote:

>>From: Steven Karafyllakis [mailto:steve@...]
>>
>>Both PS 7 and CS seem unwilling to use more than 4G of scratch disk;
>>I started with 8G on this installation, split it into two 4G and
>>still I get "scratch disks full" notices when only one partition
>>reaches its limit. Any others having this problem? Any solutions?
>>    
>>
I'm not having it, see below... what format are the partitions in, and 
are they SCRATCH file ONLY disks?  Meaning do they have other files on them?

>I suspect the limit is actually 2GB per file, since on Windows applications
>have to use a whole different API to do random access on files larger than
>that size--and weren't able to do so at all prior to (I think) Windows 2000.
>
>  
>
Take a 16 bit TIFF file in CS..  Enlarge it to 20,000 x 30,000 pixels...

Then copy the background layer to another layer..

On my machine that's almost an 8gB file in memory.. AND it blows both 
2gB and 4gB scratch file limits by, if you add up the scratch files 
created on multiple disks.  Even the individual files go beyond 2gB each..


OTOH, In PS 7 if you  do the same in 8 bit, then make some layers until 
you show a similarly large file size in Pshop.. You'll see that each 
individual scratch file IS limited to 2gB in size.. That's part of the 
reason for the limit of PShop file sizes (and that was tied to some OS 
limitations) through PShop 7, that was changed in PShop CS...  However, 
if you add up the total size of all the individual scratch files, you 
can blow by the any supposed 4 gB total scratch file size limit..
.

1)    As for a 2gB limit:

The reason Adobe has used it's own scratch file system has been to avoid 
precisely the RAM size limitations.  But, of course, Under XP you can 
put multiple paging files together to equal more than even 4gB.


2)    As for a potential 4 gB limit. 

That's only a per file limit (an even then applicable only to non NTFS 
drives). It's part of why several scratch disks can be defined.. Unless 
you use NTFS you've got a 4 gB limit per file.. Anyone who does any 
serious video editing or Movie DVD  decrypting and backup on a WinTel  
knows of that limit..

However, there also was, up  through Windows 2000, a 4gB per page file 
limit.  See info on that at:
http://support.microsoft.com/?kbid=237740


 
Keith Krebs

"Just some guy," caretaker of the Multiverse's largest EPSON printer 
User Community (highly recommended by Vogon Poets and MegaDodo 
Publications), at:
http://groups.yahoo.com/group/EPSON_Printers/
and  the Multiverse's largest Canon printer User  Community at:
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"For the rest of you out there, the secret is to bang the rocks together 
guys"