Compatibility issues are expected between certain RAID optimizations and certain applications. This has to do with the fact that certain applications try to be clever, make certain assumptions, and do things in non-portal ways.
The task at hand is in documenting those issues and have users remember when to disable and enable what.
So, so far, we know that formatting needs TCQ and SWO disabled - and now, it is also required for iSCSI image creation.
Pending the next release, I would say just keep using the array. Maybe try to create a hybrid RAID again and see how manually managing the piece feels after a while (whether is cumbersome or whether it is something an advanced user can settle into).
Ok, out of SWO & TCQ, which is the better one to keep turned on in your experience? I wonder if this was what was affecting my tRAID experience when I tried to get iSCSI images to work.
Do you have an ETA for the next release? I'd like to try and give it some time to use as a daily driver but also I want to play with the Hybrid Raid again as you've asked, as that was really quite awkward to setup effectively.... I had to run a spreadsheet to keep track of the various 'slices' & sizes assigned.
From my initial playing around, I think Hybrid Raid is something that the system should really control as much as it can as tracking where every slice has to go will become a bit more difficult, especially if you start mixing in expansions (migrations). Certainly, the system would be more effective at calculating the best available space and tracking the slice sizes than a user. From most other NAS' Hybrid Raids appear to be a set and forget; you select your drives, create your disk group / Hybrid Raid, create the volume, eat pie.
For the advanced user, it probably would be good to control the stripe size etc. but for all others, have the stripe size calculated based on the number of disks attached to the raid etc. I would also not have the user create the Raid1/5 arrays separately but simply show Hybrid Raid with the normal verify, verify+ etc. buttons... Leave the Raid 1/5 choice to the system but show it on the UoR screen once the raid is formed beside the dropped column, similar to how you can see which drives are attached to which MD level in Linux.