Hi Charles, > I saw something in my travels around the net looking for inspiration > suggesting that ADFS floppies were written tracks before heads. > Although AFAIK IDE HDD is more encapsulated than floppy (or ST506) and > doesn't permit the OS to control geometry that way, I'm not certain > about that.
You're right about floppies. But I don't think hard discs have that issue. > > You always have two in the same sector, always 24 bytes apart. And the > > first one isn't at an offset of 1. > > > > What's > > > > od -A x -t x1 -j $((1801 * 256)) -N 2048 IMAGE.000 > > > > give? > > 070900 05 3a 22 c4 13 dd 20 f2 57 72 69 74 65 52 6f 6f > 070910 74 44 69 72 22 ce 26 f2 6d 65 73 73 61 67 65 5f It looks like a BASIC program that is interested in ADFS formats and so mentions Hugo. There must be multiple copies on the drive, or old deleted copies no overwritten yet, hence each of those ones you sent earlier having the same gap of 24 bytes. However, it looks corrupt. Here's a fragment. 00000050 53 69 7a 65 25 2d 34 20 88 20 34 3a 42 75 66 25 Size%-4 . 4:Buf% 00000060 21 49 25 3d 30 3a ed 22 ec 0f e7 20 4e 65 77 4d !I%=0:."... NewM 00000070 61 70 25 20 8c 22 f6 15 20 24 44 69 72 4d 61 72 ap% .".. $DirMar 00000080 6b 25 3d 22 48 75 67 6f 22 23 00 05 cc 23 0a 15 k%="Hugo"#...#.. 00000090 20 24 44 69 72 4d 61 72 6b 25 3d 22 48 75 67 6f $DirMark%="Hugo 000000a0 22 23 14 05 cd 23 1e 14 42 75 66 25 21 31 3d 21 "#...#..Buf%!1=! 000000b0 44 69 72 4d 61 72 6b 25 23 28 15 42 46 25 3d 42 DirMark%#(.BF%=B 000000c0 75 66 25 2b 44 69 72 53 69 7a 65 25 23 32 0f e7 uf%+DirSize%#2.. 000000d0 20 4e 65 77 4d 61 70 25 20 8c 23 3c 1b 20 42 46 NewMap% .#<. BF There's no 0x0d characters anywhere in the 2048 bytes of data you sent. BASIC stores lines as the bytes (0x0d, linenum >> 8, linenum & 0xff, len) followed by len bytes of tokenised line. You do seem to have lots of `#' characters, but even if it's assumed `#' are really \r it still doesn't work. If this is BASIC then it appears either the FTP wasn't in binary mode, or an attempt to check or undo FTP translation with Perl failed. Is the original, produced by the DOS program, file available? Cheers, Ralph. ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ arcem-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/arcem-user
