Can´t chose the Scratch disc I created

[perjak03]

Hi!

I just installed a new computer and created a separate partition to be used as scratch disc/cache  in Photoshop and Ligthroom. Now to the problem. My partition doesn´t show up in Photoshop.  five other partitions show up but not the one I want to use...

Regards! /PeO

[Trevor.Dennis]

Hit the Windows key and start typing Disk Management

Click to open the app below, grab a screen shot and paste to this forum.

[perjak03]

From what D Fosse wrote my partition N: might be too small. I´ll  use J that is the biggest SSD-partition.

[D Fosse]

While 100 GB isn't a lot, it should work. The only problem I see is all the BitLocker encryption. Do you really need that? I wouldn't be surprised if that's the issue, but I'm really not familiar with it.

In any case, I'd just put scratch on the system volume. Delete the current scratch partition and use that drive as secondary scratch disk (if that's where you have most free space).

[perjak03]

Hi!

I bought a new M2 (J:) disc and installed it to store my newest images and my scrach disc on. 
But, that disc is not choosable as scratch either... Can Photoshop only se the first two discs besides my C:??

[Test Screen Name]

If bitlocker encryption is the problem, you've still got it on your new J disk.  We don't know if it is a problem.

[perjak03]

I can use G: F: C: as scratch disk and they are bitlokcer encrypted to.

[D Fosse]

While there can be good reasons for making partitions, it is generally not recommended or beneficial for the Photoshop scratch disk. You get the best performance by just leaving it on C (which it is by default), where it can move around and expand as needed.

If you have space restrictions, or you have other drives that are faster than your system drive, it makes sense to move the scratch disk. But normally you can just leave it alone.

Depending on file sizes and number of open files, the scratch disk will require somewhere between 50 - 500 GB free space for efficient operation. The official system requirements are pretty misleading here.

But yes, show us how it looks in Windows Disk Management.

[Trevor.Dennis]

I've just had a hunt round for info on using drive partitions for Photoshop Scratch space, and while I didn't find anything, I agree with Dag, and wouldn't want to do it myself.  The next step is to drive the single partitioned boot drive, and if it works OK there, you have your answer.

Something I do remember is a lot of discussion from Harm Millaard and Bill Gehrke on the Prem Pro hardware forum about dividing drives into multiple partitions, and they said it was a bad idea.

[perjak03 · Accepted solution]

Finally!

Found the solution in another forum. If I run Photoshop as administrator all disks show up and I can choose the skcratcdisk i want.