filbo@gorn.santa-cruz.ca.us (Bela Lubkin) (09/09/89)
In article <1065@lakesys.UUCP> Mike Shawaluk writes: >What nobody has said is whether it's just 256-byte sectors that are the >problem, or whether the controllers ONLY handle 512-byte sectors. >So, my question is, are any sector sizes other than 512 (i.e., 1024) bytes >supported by the popular A1000 controllers (I currently have a Supra 4x4, but >I am toying with upgrading to the C LTD Kronos unit, when it becomes >available "RSN")? AmigaDOS 1.3 -- or at least the file systems that it includes, OFS and FFS -- only support 512-byte sectors. The software support necessary to allow the file systems to work with 256-byte sectors is (or should be, someone correct me if I'm wrong) quite easy: for each AmigaDOS request for N sectors starting at location M, supply 2N sectors starting at location 2M. Handling 1K sectors would be somewhat more difficult. The driver would have to buffer 1K sectors, passing appropriate half-sectors to AmigaDOS; on writes, it would have to read a sector, copy AmigaDOS' data over half of it, and write it back. What I'm leading up to here is that I doubt any vendor would support 1K sectors without also supporting 256-byte sectors -- much the easier task. C. Ltd. is the only vendor I've been offered any hope on. Since you're already inclining toward their controller, I recommend calling them and asking. In my opinion, 256-byte support is trivial, 1K support is non-trivial, so don't get your hopes too high. Do ask them to consider adding such support if they don't already have it. Good luck. >Bela< > - Mike Shawaluk > (mikes@lakesys.lakesys.com OR ...!uunet!marque!lakesys!mikes) Bela Lubkin * * filbo@gorn.santa-cruz.ca.us CIS: 73047,1112 @ * * ...ucbvax!ucscc!gorn!filbo ^^^ REALLY slow [months] R Pentomino * Filbo @ Pyrzqxgl (408) 476-4633 & XBBS (408) 476-4945