4

My Macbook (Snow Leopard OS) was giving me the rainbow wheel of death so I tried booting into safe mode and repairing the disk, with no luck. So I decided to pull the drive out and plug it into my Ubuntu 12.04 desktop with a SATA to USB cable to recover some data before reinstalling the OS. I'm having a lot of trouble trying to mount the drive. I have installed hfsplus hfsprogs and hfsutils and run the following command.

sudo mount -t hfsplus /dev/sdd1 /mnt/"AppleMount"

Which gives me this error.

wrong fs type, bad option, bad superblock on /dev/sdd1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail  or so

Running dmesg tells me this.

[39666.815423] end_request: critical target error, dev sdd, sector 536
[39666.815429] Buffer I/O error on device sdd1, logical block 62
[39670.526393] sd 6:0:0:0: [sdd] Unhandled sense code
[39670.526397] sd 6:0:0:0: [sdd]  Result: hostbyte=invalid driverbyte=DRIVER_SENSE
[39670.526402] sd 6:0:0:0: [sdd]  Sense Key : Medium Error [current]
[39670.526407] sd 6:0:0:0: [sdd]  Add. Sense: Unrecovered read error
[39670.526412] sd 6:0:0:0: [sdd] CDB: Read(10): 28 00 00 00 02 18 00 00 08 00
[39670.526422] end_request: critical target error, dev sdd, sector 536
[39670.526427] Buffer I/O error on device sdd1, logical block 62
[39763.562415] hfs: unable to find HFS+ superblock

So I think I'm stuck at this point. Can anyone guide me in the right direction? Thank you!

  • According to this post partition is either not formatted or formatted from a recent OSX version with options currently unknown to the hfs+ driver.So unluckily you need to run OSX disk utility . – g_p Feb 21 '14 at 3:19
  • 1
    Medium error = dead drive. Or at least somewhat damaged. Check the SMART health status in the disk utility. – psusi Feb 21 '14 at 4:31
  • Yes @psusi, dead drive it was. The good news to come out of this is that I ditched Apple and have been full on ubuntu ever since. – phandolin Nov 5 '16 at 14:28
5

just for the records, here is the way I found to mount a Mac disk image created with dd.

1) Get the start and sector size

fdisk -l /path/to/image.dd

You get X for start and Y for size.

2) mount the partition

mount -t hfsplus -o ro,offset=$((512*X)),sizelimit=$((512*Y)) /path/to/image.dd /mnt/macMount

It's a mix of solution that I found. Hope this would help someone.

2

I had the same issue after duplicating an HFS+ partition so I though I might share my solution.

I solved it by running a Disk repair from Mac Os Disk Utility application. You can run it from a Macos install or the Recovery DVD.

  • ah, so the partition is damaged somehow. that makes sense. it would sure be nice if there was a way to do the repair within linux, esp. if the original mac is dead. – stochastic Jan 2 '16 at 20:32
1

Not a direct solution, but if you have destroyed HFS+ partition you may want to take a look at hfs+rescue. It would allow you to get the files even with broken partition. It even works nicely on ubuntu!

Unlike photorec it also provides filenames and directory structure.

0

For reference, something that didn't work.

(I'm on Ubuntu 14.04.3)

If I open the disk with sudo gparted, I get this message:

The journal is not empty.  Parted must replay the transactions before opening the file system.  This will modify the file system.

I can cancel or fix. I clicked fix, and then tried mounting by specifying the start point and size:

mount -v -t hfsplus -o ro,offset=,sizelimit= /dev/sdd2 /media/macdrive

0

Can't mount HFS+ drive, bad superblock?

More frequent than not, this error means you are trying to mount the whole drive rather than just the HFS+ partition.

Run this command to show you which partition you should mount:

sudo lsblk -o NAME,FSTYPE,SIZE,MOUNTPOINT,LABEL

example output: sda

├─sda1 vfat 300M EFI
|
└─sda2 hfsplus 100G VolumeName

So don't mount sda, but mount sda2 in that example.

If you are looking at how to write to an HFS+ partition, I have a guide posted here:

Guide

Your Answer

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Not the answer you're looking for? Browse other questions tagged or ask your own question.