Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Platform: Ubuntu 9.10
Disk Brand/model: WD My Book

The external hard disk suddenly unmounts after a while. I suspect it's due to it "sleeping" to save power.

I don't recall the problem having occurred before the upgrade to Karmic.

How can this be fixed?

share|improve this question
Is this a seagate/maxtor hard drive? – Darren Hall Dec 7 '09 at 22:21
lol totally a seagate/maxtor common problem. – AdminAlive Dec 7 '09 at 22:39
Updated question, with link to model page – hasen Dec 7 '09 at 22:55

I'm assuming this is a Seagate External or Seagate Freeagent drive. There are multiple articles which discuss this issue.

Solution below includes the Maxtor OneTouch.

share|improve this answer
I have a Seagate FreeAgent Pro that has been disconnecting after a while--even when I'm in the middle of running badblocks on it! I'll try out the solutions you've posted. – rob Dec 29 '09 at 21:26
Update: this didn't seem to fix my problem with a Seagate FreeAgent Pro 500 GB over USB. Power management was already disabled on my drive, but the drive seems to go to sleep anyway, even if it's in use. – rob Jan 9 '10 at 0:14

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

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