I DID finally get the Seagate 4.3G drive working as my new recording drive with CAF, in addition to my old Conner 2.15G, and both are now working fine side by side with a total of six partitions, all larger than 1 gig. The people who suggested the problem was with the hard disc driver were on the right track. Special thanks also to Claes Holmerup for his suggestions. Here is what I found out: First, through a fortunate error on my part which caused me to have to boot from floppy disc, I discovered that my ICDBoot.PRG v1.10 was not the latest version of the booter. Version 1.10 had come on the ICD6.5.5 master disc (ICD's final product) but there was an even later version that I had acquired somewhere, perhaps online (v1.23, I think) that had some bug fixes, apparently including the ability to handle multiple physical drives with large BGM partitions. I just had never needed this feature before, since I only had the one SCSI drive. This immediately solved part of the problem. Second, I had at one time known but simply forgotten that when adding a physical drive to the Falcon with ICD, one must not just update the boot program, but actually re-install it completely, and then cold boot both the drives and computer to get proper drive recognition. This at least is true with ICDBoot. I've never used another HD driver program, so I don't know about the others. But as soon as I had to re-install the booter, of course THEN I remembered. This solved another part of the puzzle. After the drive was up and running properly, by experimenting with various partition sizes I determined that Cubase Audio Falcon v2.06 will not recognize any recording partition that requires a logical sector size greater than 16384. This means the available maximum partition size is about 1073mb. (1072.65 works, 1073.74 does not. I didn't try for any better resolution than that.) I suppose a person with good HD math skills could figure it out exactly. The Falcon itself has no problem handling larger sector sizes with the ICD driver, so one might well be able to use very large partitions with applications other than CAF. ICD says that v6.5.5 is 100% AHDI compatible. It appears however from the available number of sector size digits that the ICD formatter would not be able to format a disc larger than about 5gigs, although I didn't test this theory since I don't have a larger drive. So in the end, we can add this drive (and ICD6.5.5) to the usable list for CAF. The drive model number is: Seagate Barracuda ST15150N, 4.29G 50 pin SCSI II (fast) This is actually a VERY good drive for CAF because it has about 8.5ms access time in my actual bench tests, and does not (apparently) do any thermal recals. In the final tests it played back 8 tracks at 44.1khz effortlessly (I didn't test it at 48khz). A special advantage for use with CAF is it's 4.3G capacity. There are exactly four 1072.65mb partitions available on the drive with zero waste space. Thanks again for your help, everybody. Steve Miller Hear the unique music of Neon Egypt at: www.mp3.com/neonegypt