I've been having an issue as of late, with my own BlueSCSI. It's on a Quadra 605, card is formatted, known good, single .hda file. Any version of MAcOS 7 seems to corrupt itself when writing files to itself. MacOS 8.1 runs fine, writes/reads fine, but if I install MacOS 7.1-7.6, if I write more than ~20MB to the BlueSCSI from network/External SCSI, the system will freeze, eventually a system file will get caught up in the mess and it will boot to a [?] icon. Only under System 7 though. I'm not sure why.