my x86 box has 2 sata 150 drives (what my motherboard can support) and 1 ide drive. all drives are seen as ide devices. the 2 sata drives were online without issue. as for sata cdrom/dvdrom, i would grab an IDE cdrom/dvdrom. there are no issues with these IDE devices. you can also get the install check tool from solaris.

this tool will check all hardware to make sure solaris has those drivers.

also, if you can afford scsi devices... get those. scsi has faster throughput then sata.