Just a suggestion for an extra thing to look into when next benchmarking a SMR drive. I know everyone says "don't use SMR in RAID" because... Bad rebuild times - such as the ~57 hrs vs ~20 hrs taken from the Seagate 8TB archive drive review.
But what if you built a SMR based RAID array but with the use of PMR drives for use as rebuild drives.
Now with no technical knowledge here, this would seem to fix a few issues (and may cause new ones??).
* Cheaper through use of SMR drives for initial RAID
?? * Short rebuild times - in line with PMR drives
?? * Potential for decreased future RAID performance due to mixed drive composition??
Thus I think it'd be great if we could look at testing this in the next SMR drive review? Say initial build RAID 5 x 4. Whack a bunch of data on it, test performance, yank a drive and rebuild with SMR / PMR, retest performance and compare. Also compare to RAID 5 with PMR drives with PMR rebuild (the standard setup). The potential of lowering entry cost could mean an increased size of RAID for many people without blowing the budget whilst being protected against long rebuild times?
Thoughts? (Happy to be wrong... just would like it if it was proven and not just because...)