DVD laser wavelength at the lower frequency range of the visible light spectrum.
CD Laser wavelength is lower than that of DVD laser (Infra-RED)
The PS2 has two laser LEDs, being one for CD and other for DVD.
At least 60% of the laser problems on PS2s are related to the DVD drive CPU crashing (fried tracking coils). Bad ECC data on DVD/DVD-R or CD/CD-R can be the cause. And a user here who worked at Sony confirmed that the Ps2 is actually designed/programmed to blow if used with recordable media.
A PS2 with blown coils will not read CD or DVD
A PS2 with blown DVD laser will still read CDs.
A PS2 with blown CD laser will still read DVDs. (This was pretty common on the early modchip days as all pirated games were on CDR)
The PS2 is capable of "AGC" (Automatic Gain Control) and so is all modern DVD and CD drives (this standard was set in middle 90s and is known as "Multi READ")
This allow for reading of rewritable media.
The earliest models of the PS2 (SCPH-10000/15000/3000x-up to V4) are not capable to read rewritable media but can perform "AGC" for writeable media. A option "Diagnosis" in the browser extends the range of that calibration for a little bit when enabled.
After reading this, what is your opinion ?
SCPH-10000_GH-001 SCPH-15000_GH-003 SCPH-18000_GH-008 SCPH-30001_GH-005 SCPH-30000_GH-016(V4) SCPH-30001_GH-010(V4)
2xSCPH-10190, 2xSCPH-10350, 2xSCPH-10280
"**** j0 hackers!"
-Sjeep (As seen on TOXIC OS ELF...)