usb hdd error after dd of=/dev/sda
SOLVED WITH A RETURN!
i purchased an external hard drive--its from digital research, w/ usb 2.0 and 500g of storage.
it showed up on my linux box with a volume label of FAT32, and mounted as a vfat volume.
(i am trying to back up an os x drive directly to it with dd. the reason is so i can recover data from the hfs+ volume.) i decided to experiment with the usb hdd before using with the system on which i have lost files (os x).
so i tried some experiments on my linux box, figuring dd is my friend.
well, it quit each time i tried to use it. i played with different bs values to no avail. basically in linux my commands looked somewhat like:
# dd if=/dev/zero of=/dev/sda
for example. i found that it would always quit before reaching 1g tranferred. the numbers seemed to get smaller. the last output i had said it transferred 10M to the disk.
now i have tried to use cfdisk and fdisk on it, they fail to open it. i thought they could take a drive with garbage on it and simply write a new filesystem & partitions.
Bus 001 Device 001: ID 0000:0000
Bus 004 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
i am using ubuntu 6.06 dapper with backports, and have reproduced the last state and confirmed fdisk/cfdisk still fail under knoppix 5.01.
i don't know if it matters but this is not a drive enclosure but a sealed unit (does the firmware store anything on the mbr, or other partitions?)
i didn't think dd did anything too low-level with a drive, how can i format it?
Last edited by stairwayoflight; 01-06-2007 at 03:11 PM.