Those people testing stock v other drive PLEASE try something for me.
Play Killzone up to the drop down from a cliff level (that have the intel). Maybe save it to the cloud so you don't have to play through again.
Now, install the new drive and KillZone, fetch the save and time that level load.
Weird thing: Stock *always* takes about 50-55 seconds. However, when I mount a new drive (either SSD or SSHD) the load times for this level sometimes nearly double, from what each SSD/SSHD usually performs, so the SSD takes 1 min 10 - 20 secs and SSHD takes 1 min 20 - 50 secs.
I thought I'd solved this by turning the PS4 upside down (disk issue) but this no longer works. So, I thought it must be an HD mount issue but I had it fix itself without changing the HD before. Plus the load last night was 36-40 secs on my SSD. I uninstalled KillZone, reinstalled it, and the load time is always about 1 min 5 secs on the SSD now! I did NOT reseat or remove the SSD, so for some reason the SSD is slower than stock after a reinstall of the software!. As I mentioned before, the stock drive always takes about 50-55 secs, even when swapped out then back in, suggesting this isn't an HD connection issue.
I'm really scratching my head here guys. Turning off and on didn't work. Ejecting the disk didn't work, reseating the hard drive didn't work. My main theory was a problem with the optical drive, but I didn't take the disk out when swapping HDs and stock times always remain the same! I managed to get the load time back to normal by turning the PS4 upside down (!) a fee days ago but that no longer seems to work!
Help is solving this would be appreciated. As yet I've only seen it with Killzone but haven't tested enough long loading times to see if it is present in other games.
Update; this morning the load times were still the same, however my machine would not connect to the internet and hung during the test network screen. I restarted, deleted the Killzone save then downloaded save from cloud. This time the loads were fine. Either there is an issue with the internet (unlikely) or the download from cloud option confused the Killzone saves. I'd recommend deleting any saves before downloading from the cloud in case this causes the issue.
Update 2:
I have all the drives loading quickly BUT they all loaded the level at 42 seconds, even the stock drive!
Stock drive 42 - 45 seconds over 3 runs
SSHD 42 - 45 seconds over 4 runs
SSD 36 - 42 seconds over 5 runs (normally 38 - 39)