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My Ubuntu is consistently failing to properly unmount the disk when shutting down, which means that I have to boot twice each time (I don't reboot often, but it is an issue nonetheless). I've got no idea why did it start doing this - how can I diagnose why is it doing this?

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closed as off topic by fossfreedom Feb 29 '12 at 9:35

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What version of ubuntu are you using and, if you can, provide a log of what dmesg says about it. Did you edit some file like fstab? – Luis Alvarado Mar 25 '11 at 15:46
Why do you think it is not being unmounted properly? Also what filesystem are you using? – psusi Mar 25 '11 at 15:59
Ubuntu 10.10. I don't believe fstab has been edited. Here are dmesg files: Using ext4, and I know it's being unmounted properly because os-prober on natty failed to detect this partition, and the cause was because it was not unmounted properly - once I mounted and unmounted it in natty, os-prober located it. – Vadi Mar 29 '11 at 22:18
@Vadi is this still affecting you? If yes, can you please paste your linked dmesg files into the question? Also, can you confirm you are really on 10.10 (not 10.04-LTS or 11.10?). Thanks. – Tom Brossman Feb 26 '12 at 12:15
It's been nearly a year since I asked the question... I'm on 11.10 now. I think it's fine now - that, or I have more pressing issues like Ubuntu hibernating right away whenever I unplug my laptop, even though I'm on full battery:… – Vadi Feb 27 '12 at 20:18

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