MaxTransfer , how and where.

[Ilwrath]

string gadget containing the max transfer value. Change it to 0x0001FE00

It's just a spot where you can type in a value.  It'll probably have 0xFFFFFFFF in it.  That is a bad value.  The A1200 HD controller has a nasty buffer bug that shows up on certain hard drives.  The Max Transfer value needs to be something much smaller.  There is some debate over what an optimal value is, but that 0x0001FE00 should work.  

third reformat, that means that i have to put os back on,

You won't HAVE to.  But, the problem is, while the max transfer was incorrectly set, every file larger than about 256kB or so written to that hard drive has a chance of being corrupt.  Who knows how many problems are lurking undiscovered in a system like that.

[Ilwrath]

i dont get it, if its going to corrupt the files what is the point of doing it,
wont it fix it, .

The files already copied may already be corrupt.  You can't do anything about those.  That's why it's recommended to format and reinstall.

Setting the new value will allow NEW files written to the drive to be written properly.

[Ilwrath]

0x0001FE00? Where does that value come from?

I've always had the impression that 64K is a limit on some systems, so something like 0x0000FF00 would be logical (wouldn't make much of a performance difference anyway). Could someone enlighten me?

I'm not positive.  Personally, I ran 0x0001FFFF back in the day.  That was what the local C= dealer recommended.  I've heard all three values cited.  I've never heard of anyone having problems at 0x0001FE00 or less, though.  (And, personally, I never had any problems at 0x0001FFFF on a drive that had loads of problems at the default value.)