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ethomaz on 13 April 2013
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SvennoJ said:

And more. It's a 6x CAV drive which is better for seek times but read times are 2.4x slower when reading the inside of the disc.

6x CAV ps4 = 216 mbps / 27 MBs at the outer edge to 90 mbps / 11.25 MBs at the inner edge
2x CLV ps3 = 72 mbps / 9 MBs anywhere on the disk, seek times are much worse as the rotational speed has to change.

Don't worry too much about a loud drive, it doesn't spin that much faster then the ps3 drive at full speed (~4900 rpm vs ~3900 rpm). However it will always spin at that speed.

HDD install will be even more essential next gen to feed all that ram efficiently. The blu-ray drive will be better able to help this time with the lower seek times and the much faster outer track. 1st party games will benefit by using both hdd and optical drive. Use 1 layer for a fast initial install at 27MBs, use the other layer for fast data access while playing, and use the slower parts of the disc for fmv and background loading.
The question is whether 3rd party devs are going to bother since the next xbox is rumored to always do a full hdd install. Why optimize for disk plus hdd use if it's easier to have 1 version for both disc and digital distribution?

The 6x CAV kinda puts my hopes down for a 4K disc format to run on ps4. 90 mbps is not fast enough for disc quality 4K. Maybe in a couple years a ps4 slim will feature a 12x CAV drive for 4K disc playback. (max speed is about 10,000 rpm) (And it will need to be able to read 8 layer 200 GB discs ofcourse...)

I think no game will have HDD install in next gen for PS4... well the only first party game to use install is GT5.

And the PS3 uses a slow 5400 HDD that performs worst than a 5400 HDD in PC... It really get me crazy to install a 1GB game.