I assigned this to a Windows specialist. They have your screen captures and diagnostic file.

When you get a response, reply with the zip file and any other descriptive information that can help them (copy/paste this post).

Sorry I'm a bit confused by the above - when I get a response to what?

The volume is in NTFS.

I've attempted attaching the OWC diagnostic file but I'm not sure if it's worked? I don't appear to be able to see attachments before posting.

Thankyou.

I am not sure if you can post zip, but I think so. I may need to open a support case, as there are no active windows engineers monitoring the forum.

One comment, however, is a simple misconception you had, when disks have "partitions"/volumes on them, and you try to create a new volume, you can only use the remaining available partitionable space, i.e, 912MB in your case. Delete the volume and all free space is available.

What file system was your volume? that may be a clue also...

Mercury Elite Pro Quad

4x Seagate Ironwolf 10TB

My OWC enclosure was delivered yesterday, along with 4 brand new seagate 10TB HDD's I was able to setup a RAID 5 volume (NTFS), and copy a bunch of files into the volume, however when I tried to access the files they suddenly disappeared. Next thing SoftRAID shows two drives as 'missing' - despite showing as 'healthy' in Softraid. I deleted the volume and attempt to start from scratch, but two of the drives are shown as only having 912mb free (impossible) thus there's not enough storage space to create a RAID5 volume with the drives.

I attempted to clean the drives in SoftRAID, but get a message saying they are protected by safeguard (despite there being no option to disable safeguard on the individual drives). Luckily I have a Mac computer for work, so I was able to completely scrub the whole volume (which was showing up as raid5 on my mac, interestingly). I then plugged the enclosure back into my windows computer, to start the whole process again.

I can create a RAID5 volume, copy files into it, however then these files disappear. I restart my computer, and now in SoftRAID I have duplicates of all of my drives!?! So two A drives, two B drives, etc. One set show 912.0 MB free per drive, the other shows 9.1TB free per drive.

Am I doing something wrong, and if so, what? This is the furthest thing from 'plug and play'? Can someone please advise on how I can fix these issues?