I guess that it depends on what the console sees those discs as (SACDs were developed after the PS2's launch, right?).
Originally Posted by kevstah2004
If they are seen as audio discs, they will appear as CDDA discs.
But because they aren't exactly CDDA discs... they might appear as "illegal" discs (Type 0xFF).
If the CD-i contains audio tracks, it might be detected as a CDDA disc... otherwise it'll definitely appear as an illegal disc.
A SACD will probably appear as an illegal disc though. I doubt that the PS2 would recognize it's format.
Unmodified SCPH-77006 with SM 3.6
SCPH-39006 with M-chip modchip, SCPH-10281 NA and refurb Seagate 80GB HDD
SCPH-10000 v1.00 with SCPH-10190 PCMCIA NA and SCPH-20400 HDD unit