Hi Paul-Kenji, On Thu, 2013-01-24 at 10:48 +0000, Paul-Kenji Cahier wrote: > Hi all, > > I am running 3.2.5-gg987 and I am experiencing a problem mounting my > 3TB HFS+ formatted drive. > The drive has been used on a mac (and formatted there) for a long > time. I just need RO access to it, so journaling shouldn't be an > issue. > > Regardless of my mount attempts it errors with: > [681648.160023] hfs: invalid secondary volume header > [681648.160026] hfs: unable to find HFS+ superblock > > > Here's the drive info: > $ sudo parted /dev/sdb unit B print > Model: ATA WDC WD30EZRX-00D (scsi) > Disk /dev/sdb: 3000592982016B > Sector size (logical/physical): 512B/4096B > Partition Table: gpt > > Number Start End Size File system Name Flags > 1 20480B 209735679B 209715200B fat32 EFI System Partition boot > 2 209735680B 3000458743807B 3000249008128B hfs+ > 3TB-Backup > > > Things I've tried: > Direct mount: > sudo mount -t hfsplus /dev/sdb2 /testmnt > > Offset mount: > sudo mount -t hfsplus -o ro,loop,offset=209735680 /dev/sdb /testmnt > > Manual loop device offset mount: > sudo losetup -f /dev/sdb --offset 209735680 --sizelimit 3000249008128 --show > sudo mount -t hfsplus -o loop,force,ro /dev/loop0 /testmnt > > Manual loop device direct mount: > sudo losetup /dev/sdb2 --offset 0 --sizelimit 3000249008128 --show > sudo mount -t hfsplus -o loop,force,ro /dev/loop0 /testmnt > > > None of this works. > For what it's worth, the block headers are per HFS+ specification in > the right place: > > $ sudo dd if=/dev/sdb2 bs=1024 skip=1 count=1|hd|head > 00000000 48 2b 00 04 80 00 21 00 48 46 53 4a 00 00 15 d6 |H+....!.HFSJ....| > 00000010 cd 0e 7c 22 cd 0f 0d 10 00 00 00 00 cd 0e 6e 12 |..|"..........n.| > > $ sudo dd if=/dev/sdb2 bs=1024 skip=$((3000249008128/1024-1)) count=1|hd|head > 00000000 48 2b 00 04 80 00 21 00 31 30 2e 30 00 00 15 d6 |H+....!.10.0....| > 00000010 cd 0e 7c 22 cd 0e 6e 12 00 00 00 00 cd 0e 6e 12 |..|"..n.......n.| > Thank you for detailed report. I think that it is a not valid calculation of secondary volume header placement in driver code. I will check this presupposition. Could you enable DBG masks (please, see hfsplus_fs.h), recompile kernel and try to mount again? Could you share debug output in the system log with enabled DBG masks? Thanks, Vyacheslav Dubeyko. > Thanks, > > -fcpk/Paul-Kenji > -- > To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
