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Use your fastest disk (your SSD) for your disk cache. There is no problem with having you applications, OS, and disk cache all on the same drive.
Hm - this Adobe white paper states
"Multiple drives may be used to deliver higher performance. A simple technique is to install multiple
single drives in a desktop workstation computer, and dedicate each to specific tasks: for example,
one for the operating system, one for your files (with potentially separate drives for your sources
and output, especially for Adobe Premiere Pro), and one for your temporary storage caches"
I am attempting to optimise performance here, not merely avoid problems. If I were to go ahead and get the Sonnet Tempo, Todd, are you saying there would be no noticeable performance gain by then using other (albeit slightly slower) drives for the OS? Or, to put it another way, if one's drives vary in IO speed, there is no point in using ANY of them other than the fastest one for Apps, OS and all AE Caches?
Yes, you should have multiple drives and distribute things across them for optimum performance. But, there is almost zero to be gained by having your disk cache on a different drive than your applications. Applications are read from disk at start time and almost never again during application execution; the disk cache is read from only after application start has completed.
If you have multiple SSDs, sure, go ahead and use one each for application-plus-OS and disk cache. But if you only have one, there's no problem.
The point that the white paper that you quote from (which I edited) is trying to make is that you should distribute things such that there is never a bottleneck. The worst cause of such bottlenecks is putting stuff that needs to be read during rendering (e.g., source media) on the same drive on which you're writing data (e.g., exported movie files). This is especially bad with mechanical hard disks. The same principle says that you should not put your disk cache on the same disk as either your source media or your exported files, since the disk cache is being continually read from and written to.
Thanks for the link to Tweakers Page - interesting reading and not something I was aware of. Just a shame its mostly Windows and PR centric.
I am getting a better grasp now… and am thinking of going with this setup
New SSD on Sonnet Tempo (Fastest, about 500MB/s) - Disk Cache
2 x Caviars in RAID0 (about 200MB/s) - Media and Project Files
Old SSD (about 120 MB/s) - OS and Applications
So - 2 questions now
1. Does this sound like the best use of these drives for AE performance?
2. Where would be the best place for the 'Conformed Media' folder?
1. Yes (via Thunderbolt?)
2. On the Sonnet, since it is the fastest volume.
All drives are internal - no Thunderbolt intended