When formatting hard drives of a larger size I only ever use 'Quick Format' and don't use the HDToolbox for formatting drives. They tend to wrap around and fall off the edge. Dunno about the new WB as I have never used it. But with say a 40GB drive I have to format just 4GB tops and I have max 2Gb partitions. I make sure the remainder is empty. If the new OS provides for larger hard drives maybe a Quick Format would help. Anyway , that's what I do but I only use 2.5" drives or 3.5" drives. You would have to check if that causes problems with CF card thingies, again never use them. I have only ever needed to set the max transfer on 3.5" IDE hard drives on the 1200. Without it it refuses to copy all the contents of a whole disk and fails. Interestingly the corrupt files is something I only experienced with SCSI and lack of termination.
Dunno if you have LHA set up on DOpus but as a test create a LHA file consisting of lots of files writing to somewhere on your hard drive and see if the process begins to slow down the more the system adds. Also watch for corrupt or failed archiving. Then do the same but copy to RAM and the same to a smaller partition on the drive. Dunno if you said you had an accelerator but maybe a caching issue so try booting disabling CPU caches. Validating is no use, you need to soak and record the results. Could be a memory issue.
Always check the specs on your devices before trying anything. And don't forget the Amiga doesn't forget for at least 17 seconds. Thats the difference between a soft and a hard. So if it remembers something that it thought was wrong it'll soft very often replicating the same problem or throw up a GURU. Only the hard clears the memory.
