DiskTooSlowErr (the CPU's file system was unable to perform certain disk operations quickly enough).- Verify the drive is on the compatibility list.- Verify the drive has the correct firmware (use SCSI Probe or formatter).- Verify all software is current (Session, DAE, DigiSystem INIT).- Calculate Folder Sizes (in Views CDev) should be disabled.- Verify the SCSI Bus (including internal) is terminated properly.- Check fragmentation, and the last time the drive was formatted.- Check SCSI length (SCSI chain should be <15').- Check for non-standard data transfers in formatter (use Mac Hardware Handshakes).- Format the drive with a known compatible formatting program.- Quadra should be running System 7.1 or later with the current Hardware System Update (from Apple) installed.- Bounce tracks with a lot of edits, then replace the original regions with the bounced file.