On 8/1/07, Ananth Shrinivas <Ananth.Shrinivas at sun.com> wrote: > Hey Anil, > > All that fdisk does, is to print the partition table information present > in the MBR. If the MBR on the USB doesn't contain a valid partition > table at 0x1BE - Garbage In, Garbage Out. > > Here is a test I just did on my USB Key: > > # dd if=/dev/zero of=/dev/rdsk/c7t0d0p0 bs=512 count=1 > 1+0 records in > 1+0 records out > # fdisk -W - c7t0d0p0 | tail -1 > * Id Act Bhead Bsect Bcyl Ehead Esect Ecyl Rsect Numsect > > This is definitely not flaky behaviour from fdisk. So what exactly are > you using the information from 'fdisk -W' for ? >
Thanks Ananth, I think we now nailed the Bug. The Rsect value is used to calculate the size of the USB, and this wont work on unformatted drives. We go on to format it as ufs (using fdisk -B) later on in the script. that is what was causing the error. I moved it up before size calculation. Fixed the bug and added a -debug swich that will allow for easy debugging. The new usbdump (v1.3) is linked. Anyone who faces errors should boot into belenix, replace usbdump with this version in /usr/bin and run it. http://blogs.sun.com/anilg/resource/usbdump Cheers Anil
