Not indexing (searching) truecrypt volume

I can't get windows 10 to search mounted truecrypt volumes, ie, type part of the file name into the "search windows" box and it doesn't bring up a "best match", I just get "no results found".
I have added the volumes to indexing locations in the indexing options (eg local disk W) and it appears to be indexing it. They are listed in the "included locations" and after a few minutes indexed items goes up from 3,000 to 10,000 but the search box doesn't find any of the files.
I have tried restarting the services
net stop wmpnetworksvc
net stop WSearch
net start Wsearch
net start wmpnetworksvc
And also "rebuild index" but it still doesn't function.

Any suggestions?

dalchina said:

Hi, which search box? Cortana's or file explorer's?

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The search box in the bottom left corner of the desktop, hover over it and you get a "search windows" label.

An example of the problem. Say I have some photos called DSG001.JPG, DSG002.JPG.... etc, if they are located in "my documents" or any other indexed location on the C: drive I can type "DSG" into the search box and it will list them under "best match". If they are located on a mounted truecrypt volume, in this example drive W: they will not be found, even though the indexing options has local drive W: as an indexed location.

dalchina said:

Oddly I find the drive letter created by Truecrypt does not appear in the list of drives shown in Indexing Options, so I can't add it to be indexed, so you're doing better in that respect.

The drive letter wont show unless it was already mounted when the indexing service was started. Restarting the windows search service, either in services or using the command lines (as admin) in my original post, should make them show in the indexing options.

dalchina said:

I'd suggest you experiment with file explorer: browse to your mounted Truecrypt drive, and see if you can then find a file instantly (i.e. indexed).

Searching in explorer does work but very slow, it takes several minutes if the file is in a sub-directory, it appears to be searching from scratch without using any kind of index.

dalchina said:

and presumably Ultrasearch, Everything by void tools

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Thanks, that has help me identify the problem. Ultrasearch looked great but it states that it only works of NTFS file systems and my Truecrypt volumes are FAT32. I just tried creating a NTFS Truecrypt volume and added some files, restarted the indexing, added the drive to the included locations and the windows search does find it.
I guess as a sort of fix I can use NTFS instead of FAT32 but that doesn't explain why it appears to index the FAT32 files (i.e. the number of index items goes up) but is unable to find them.
So the question now is, why doesn't windows search work correctly on FAT32 file systems and how do I fix it.

dalchina said:

Note that indexing a FAT32 USB drive works ok.

So now I am really confused. If a FAT32 USB works ok and a Truecrypt NTFS works ok, why doesn't a Truecrypt FAT32?