Chuck(G)
25k Member
I've just run across a bunch of 360K 5.25" disks from 1989 that are formatted as 10 sectors per track, 40 tracks that contain a multi-volume backup.
At first, I said "Aha! Must be Fastback or most likely early PCTools." Neither. FB and PCtools are the only backup utilities that I recall that use that peculiar format. Anyone have any other clues? Here's a partial dump of the first sector of the first floppy:
FWIW, the head IDs are the normal 0 and 1 and the sector IDs are 1-10 on both sides.
Anyone got any clues? Maybe I'm just having a lapse in memory, but it doesn't look familiar, in spite of the "PCBACKUP' in the start of the sector.
At first, I said "Aha! Must be Fastback or most likely early PCTools." Neither. FB and PCtools are the only backup utilities that I recall that use that peculiar format. Anyone have any other clues? Here's a partial dump of the first sector of the first floppy:
Code:
000000 50 43 42 41 43 4B 55 50-2E 01 00 50 43 42 00 06 PCBACKUP.? PCB ?
000010 04 00 69 00 00 00 00 00-00 00 00 00 00 00 00 00 ? i
000020 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00
000030 00 00 00 00 00 00 00 00-00 00 00 00 01 01 01 01 ????
000040 01 01 01 01 01 01 01 01-01 01 01 01 01 01 01 01 ????????????????
000050 01 01 01 01 01 01 01 01-01 01 01 01 01 01 01 01 ????????????????
000060 01 01 01 01 01 5A 5A 5A-5A 5A 5A 5A 5A 5A 5A 5A ?????ZZZZZZZZZZZ
000070 5A 5A 5A 5A 5A 5A 5A 5A-5A 5A 5A 5A 5A 5A 5A 5A ZZZZZZZZZZZZZZZZ
000080 5A 5A 5A 5A 5A 5A 5A 5A-5A 5A 5A 5A 5A 52 13 C5 ZZZZZZZZZZZZZR?+
000090 9A 01 00 1E 00 01 00 54-55 52 42 4F 43 5C 00 00 Ü? ? ? TURBOC\
FWIW, the head IDs are the normal 0 and 1 and the sector IDs are 1-10 on both sides.
Anyone got any clues? Maybe I'm just having a lapse in memory, but it doesn't look familiar, in spite of the "PCBACKUP' in the start of the sector.