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scsi host4: Adaptec AIC7892, model 29160N, Ultra160 SCSI adapter
scsi host4: aic7892: Ultra160 Wide Channel A, CTRL ID=7
scsi host4: scsi-mmc drive attached dvdram /dev/sr0
dvdram: blk_defIO_buffer, 8MB
dvdram: loop0 attached dvdram /dev/dvdram0
dvdram: partitions [mac] /dev/dvdram0p1 /dev/dvdram0p2 /dev/dvdram0p3
On my linux-PC
So, I am using a couple of DVD-RAM units inside a SCSI tower. Good technology, it works on linux, although.. you need some tricks because the cartridge is not handled as "disk". It's more like a writable DVD, it doesn't directly support blocks of 512 byte, therefore you also need to pass through deferred buffer, and if you want partitions (e.g. mac-partiton table) I need to pass through a loopback mechanism.
Once you have tuned, it works great!
I wonder if IRIX can handle DVD-RAMs, and how it goes.