2 SATA drives - Where should I place my ACRcache, catalog, and images?

Two drives
Application is on the boot drive.
Where/how should I split up the ACRcache, catalog, and images?
Should I have the catalog on a different drive then the cache?
Should the catalog and cache be on the same drive?
thanks

Louie Sherwin wrote:
dorin_nicolaescu wrote:
I would put my catalog and images on one drive and have my system, applications and ACR cache on the other.
Why?
Hi Dorin,
Well basically there are four areas where disk I/O can impact performance. The catalog, previews, images and ACR cache. So with only two drives how do you minimize disk contention during typical LR editing?
Of the four the ACR cache activity is going to be both frequent and be writing large blocks data. Splitting it off first is makes the most sense. Putting it the system disk also makes sense since while running Lightroom that is going to be mostly idle since hopefully you are presumably just running LR.
The catalog is clearly going to have the highest update frequency but data sizes of each will be very small. So keeping it separate from the cache is a good idea.
The previews by default get stored with the catalog and since they are generated in the back ground with lower priority it is best to leave them where they are.
The image files clearly are best on the second disk. So practically it makes more sense to keep the catalog and images together if for no other reason than backup is simpler. Just clone you image disk every couple of days and you have a complete usable catalog.
-louie
Louie,
So, based on your experience, how would you go about it with a portable (I have a Macbook Pro). I have the application, catalog and previews on the boot drive, images on an eSATA 2TB RAID 0, ALRCache on another eSATA just straight 1TB - (all 7200 RPM / 32MB cache) via Expresscard 34 (which operates at 1.5)..
Jay S.

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