File Placement Changes Result Data Loss

[brian2019]

I have 2 nvme ssds and 2 8TB hdds in drivepool.

I used folder 2X duplication.  I manually use file placement to set a folder that I need to be fast for the SSDs and once no longer need the speed I set placement to the HDDs.

Setting:
RootFolder (set to HD1, HD2)
   - SubFolder1 (set to HD1, HD2, SSD1, SSD2)
        - SubSubFolder1 (set to HD1, HD2)
        - SubSubFolder2 (set to SSD1, SSD2)

There is a sequence of changing from ssd to hdd of the subsub folder that result in data loss - I am missing 3/4 of the files in the subsub folder after setting it to HDDs from SSDs

What is the correct way to set this so it doesn't happen again.

Thanks,
Brian

[Christopher (Drashna)]

It shouldn't happen in the first place.  Period.  

If you did experience data loss, I would highly recommend running CHKDSK on all of the disks in the pool, to make sure that there are no disk errors that are causing this. 

 

If the files can't find a place on the drives that complies with the balancing and file placement rules, it will just violate them.   It won't remove them from the pool. Ever.