I'm looking for people who also have their Ubunutu/Linux running on a MomentusXT ST750LX003. A partitiion/volume is shown to me that I can't mount, nor really place where it comes from. It is formatted in HFS+ and about 8GB large. Could the drive have a defect and show me the SSD cache? I read "Is Seagate's new “FAST Factor Boot” technology compatible with Ubuntu?", that it shouldn't.

Please find screenshots from both GParted, the error I receive when trying to open and from Windows 7 drive manager.

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It's not a dual-boot system on the MomentusXT, rather Ubuntu is installed alone on it, while Windows 7 is on an extra SSD SYSTEM (C:). DATEN (D:) is a regular HDD.

Thanks for any advice what this volume could be, and/or how to solve the mounting error. Preferably, please check your own MomentusXTs in GParted and let me know if this ~8GB HFS+ volume appears as well.

  • Have you tried to mount it manually and see what it contains: sudo mount -t hfsplus /dev/sdb5 ~/<some_temporary_folder>? Maybe that is just a partition with software/manuals to OSX.
    – Salem
    Apr 5 '13 at 11:16

It's just a regular disk partition that you, or somebody, created and it looks like it has a corrupted hfs filesystem on it. If it doesn't have any data in it you care about, then blow it away.


The command you suggested results in "wrong fs type, bad option, bad superblock on /dev/sdb5, missing codepage or helper program, or other error. In some cases useful info is found in syslog - try dmesg | tail or so"

dmesg | tail reports "hfs: invalid secondary volume header" and "hfs: unable to find HFS+ superblock"

Would it make sense to try and merge the volume into my main Ubuntu partition with GParted?

Thanks and greetings!

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