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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!

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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 at 3:19
Medium error = dead drive. Or at least somewhat damaged. Check the SMART health status in the disk utility. –  psusi Feb 21 at 4:31

1 Answer 1

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.

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