On 7/9/07, Jim Meyering <[EMAIL PROTECTED]> wrote: > Jim Meyering <[EMAIL PROTECTED]> wrote: > ... > > For example, can you give me a sequence of commands to create a > > small image for which parted-before-your-patch fails, yet with your > > patch it works? > > > > E.g., > > > > dev=loop-file > > dd if=/dev/zero of=$dev bs=1 count=50K 2> /dev/null > > ./parted -s $dev mklabel gpt > > # change HeaderSize and checksum > > # do something with the label, e.g., ./parted -s $dev p > > Alternatively, just create a ZFS partition on OpenSolaris, > tell me the commands you used (for reference), send me the first > few KB of the image, and I'll do the rest.
The form of the "# change HeaderSize and checksum" commands would be # In both the primary and backup GPT tables, change HeaderSize to 512 # and set the checksum appropriately. echo -ne '\0\02\0\0\0200\072\0253\0203' | dd of=$dev bs=1 conv=notrunc seek=524 echo -ne '\0\02\0\0\0164\0155\062\0176' | dd of=$dev bs=1 conv=notrunc seek=50700 (where the first four bytes written are the header size and the second four bytes are the CRC) but yesterday I had trouble getting checksum values to work: I added print statements to print the computed checksum, but the value seemed to change after I modified the checksum in the image, which shouldn't happen. Tonight I may try to extract the label from my ZFS partition, but (1) I don't think I have a spare disk I can use to create a new ZFS partition, and (2) Parted may not work correctly on it yet because I haven't sent you the other bugfix. Matthew _______________________________________________ parted-devel mailing list [email protected] http://lists.alioth.debian.org/mailman/listinfo/parted-devel
