All discs are burned @8x and scanned @8x with SB/HT/OHT=on & OS=off
First three discs burned & scanned=2 days back.
Last/Fourth disc burned & scanned=today
These MCC discs are from same spindle. I even tried to reset learn media & HT setting with eeprom utility and then tried to burn few more discs but all discs have same result with lots of PIE/PIF errors. Also i got few coasters today.