PS2 FreeDVDBoot ESR GUI, game only boots sometimes

FreeDVDBoot ESR (v0.4)

I burned a copy of XII: International Zodiac Job System with english patch, and it didn't load on my slim 90000, some people say it doesn't work with 90000, the official post by Jabu on PS2-home says any slim model...

Anyway, I popped the disk I burned into a 77k slim and it worked 1st try... and then it didn't boot for the next 15 tries. I am still on English, I swapped to RGB after the first boot from YPbPr to fix the green screen, but I tried switching back to YPbPr mode and it still wasn't working. I finally got it to boot again with no changes in RGB mode... I have no idea why it isn't booting every time.

PS2:
SCPH-77001 slim has DVD Player v3.11U

DVDs: TDK DVD-R (seems to be single layer? 4.38GB) I used is a set I've had laying around since like 2009. The top is printable and my Epson printer is dope, so I planned on printing the game disc art on it if it starts working consistently. (I recently started making some PS1 CD-Rs with printed tops and they look amazing)

Burning: ImgBurn, I did burn at 16x speed which is the max speed the DVDs seem to want. Some people online say to burn at the slowest speed available for the DVD, which is 8x in this case. Does that actually help? For PS1 games, I actually HAVE to burn at MAX, burning slower would make the games stutter.

Anyone have any experience or advise for this?


Update:

Burning at 8x made no difference vs 16x.

The PS2 seems to only successfully read the DVD if it has been off for a couple minutes! Both times I turned the console off and walked away before retesting, it booted right up. Another time it worked, I had just left the 16x DVD in the drive with the console powered up for a while, then when putting the 8x in, it worked.

So it seems to be an issue with not the console being ON, but whether the game was recently running or not? Does the PS2 cache part of the game, and then when trying to reboot it realizes it isn't a legit Sony disc?
 
In most cases:
  • Low quality discs (which is common these days)
  • Eternal DVD writers... also are not so good
You can try to write this game on an internal writer.
Try also DVD-R, instead of DVD+R.
Try different writing speed.

Or use OPL or NHDDL+Neutrino to launch this game from a USB disk.
You can also try the ETH port (only OPL).
 
It's a reading issue...


Burn with IMGBurn.
Turn "perform OPC" in Settings - Write - Page 1 ON.

Write-speed depends on the writer and media (see Manufacturer ID)!
 
You could test your backup with Opti Drive Control, see if the Disc Quality tab will work on your writer . That would be the final test for a disc and you might notice some differences between 8x and 16x .
 

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