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I have a notebook with a Seagate Momentum 5400.6 in it. Suddenly it stopped working, only giving strange errors when trying to boot windows. I booted with an Ubuntu DVD, but Ubuntu couldn't fing the hard drive. So I tried putting it into an external case, and mount it through USB.

But same problem here: The hard drive is not mounted. I tried it on a MacBook, DiskUtility shows the disk (500.11GB ST950032...), three partitions (disk3s1, System Reserved and disk3s3), and that's it. The System Reserved takes a bit time to show up. When I try to mount one of the others, it says, that it couldn't be mounted.

The sound of the harddrive's spin sounds good, no clicking, beeping... Any ideas, how I can mount this harddrive?

Journeyman Geek
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23tux
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  • Switch up the power/data cables, they might be the problem. Or the mobo port. – Raystafarian Dec 27 '13 at 10:48
  • Which filesystem is used on the drive? – MariusMatutiae Dec 27 '13 at 12:04
  • @Raystafarian I don't think the cables are the problem, because the external usb case works with other hard drives and therefore, the motherboard ports can't be the problem. – 23tux Dec 27 '13 at 13:19
  • @MariusMatutiae the filesystem is NTFS – 23tux Dec 27 '13 at 13:20
  • I'm confused. You used the same case & cables for a different disk on the same computer, same OS, same mobo connection? And you also used the current disk with the same configuration on a different machine? – Raystafarian Dec 27 '13 at 13:22
  • No, the hard disk was inside a laptop; I dismounted it from the laptop, and put it in an external usb hard drive case. The harddisk doesn't work inside the motherboard (as I described using a bootable Ubuntu DVD, which couldn't mount the hdd), and it doesn't work when trying to connect it as an external usb device – 23tux Dec 27 '13 at 13:25
  • In Ubuntu, what does lsusb say? Does it identify the disk? If it does, can you try to mount it with sudo mount /dev/sdX /mnt, where X is the mount letter, could be a,b,c... (make sure you have the right letter by checking contento of mounted drive in /mnt). – MariusMatutiae Dec 27 '13 at 13:29
  • Check the [smart](http://superuser.com/questions/14803/what-is-the-easiest-method-of-checking-smart-status-for-your-hard-drive) status of the disk, it might be dying even without clicking, beeping, etc. – GnP Feb 03 '14 at 17:58

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