Got the same harddrive, sold at walmart and other places. "seagate backup plus slim 1tb, ST1000LM035. (in in a black aluminum portable box glued together, you can force it open with your fingers and flip the hdd out).
super slim ps3, noticed no lag or anything on the 500gb WD BLUE, or the native 250gb, installed games on them but don't want to switch around hdds anymore.
I'll let you know i I see lag in intro videos or something, maybe be isolated to using cfw, versus using ofw with the "han hack".
all the same you could be right.
828 gb free no games installed just HAN hack on OFW 4.82 (i've seen different information reported using cfw from google, i think the cfw figure was 865 gb free, doesn't mean you get more means something is wrong, I won't be testing premonition specifically that game, but just what I will install, trying to avoid deleting anything (games that is) after a fresh format on the hdd)
Dynasty Warriors 2 Gundam - opening video work find without freezes/skipping
(I believe you but, I think the problem is either fragmentation from deleting and replacing a lot of games................or the "cfw and ps3 model" combination. I'm using HAN, I know users verified cooling issues with the fan not working, or not speeding up with "cfw" that a known problem..................hdd performance in "cfw" is probably the problem)
(with 1 terabyte hdd, same model from walmart, only 828 gig free, if you have more then that on cfw, something is not right)
("deadly premonition" is really a boring game", its cousin game "alone in the dark" is however a fun game! that's probably the one game I have no intentions of installing, don't intend on deleting and replacing any games)
(back in the day ...............with PS2 Console (yes the PS2), if you installed and replaced a few games and caused fragmentation, then when you added, Metal Gear Solid 2 Substance (i think also MGS3 subsistance), then the game would not boot it would only have a black screen..................those games had to be added before fragmentation was present, from deleting and replacing too many games, or they would not work.......................they dynamics of a fragmented drive are pretty much the same, cough, (go through the trouble of a reformat, reinstall your games)
(the PS2 for the games that boot up on the harddrive, won't skip after significant fragmentation is present, which makes cleaning up that mess harder to justify, if you have hours of games to install to get things back up to speed)
EDIT
(noticed no problems after playing several games, sega all stars racing not the sequal, "sega all stars transfored", skips at the logo briefly the same way it does on the vita i think) (I have about 9 gigs left free on the drive itself, no problems)
(best I can say is maybe the drive is fragmented, i had to delete one or two games during install with HAN because I forgot to install the license.pkg after the game and patch file, or just the game file. but I always deleted everything i installed up too that point, i think your drive is just fragmented)
(I haven't tested "deadly premonition" specifically on the drive, but, maybe try reformatting and starting over, i'm sure you installed many games, and reinstalled a bunch, am i right)