Write to second sector of floppy

damonbrinkley · Post by **damonbrinkley** » Fri Feb 07, 2003 7:03 pm

Anyone know the command to tell dd to write to the second sector of a floppy diisk in Linux? I'm trying to write something to the sector after the bootsector.

gtsphere · Post by **gtsphere** » Sat Feb 08, 2003 12:55 am

try this:

dd if=yourfile of=/dev/fd0 bs=512 seek=18

Tim · Post by **Tim** » Sat Feb 08, 2003 3:17 am

Where does 'seek=18' come from? Surely the second sector is block 1, i.e. seek=1.

distantvoices · Post by **distantvoices** » Sat Feb 08, 2003 5:15 am

seek=1 = sector 1, seek=18 = sector 18 as far as i have found out .

damonbrinkley · Post by **damonbrinkley** » Sat Feb 08, 2003 7:42 am

Thanks guys. I'll try that out this afternoon.

Schol-R-LEA · Post by **Schol-R-LEA** » Sat Feb 08, 2003 11:13 am

It has, however, occurred to me that logical sector 18 is the first sector of the second track. Perhaps there's been a bit of confusion here...

(Note that this assumes zero-indexed sectors. While dd(1) and just about all other Linux utilities use 0-indexing, the BIOS INT 13h routines use 1-indexing for the sectors and 0-indexing for everything else. This has been the source of considerable confusion in the past.)

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Write to second sector of floppy

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