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I have a partition /data which supposed to store data and its format is ext4. Since it not in home folder and I forget to format it as FAT at the beginning, I cannot copy any file into here unless I use root access. Eventually I decide to umount it.

After that, I always get the prompt /data is not mounted. Press S to skip, or press M to manually recover at booting screen. It is a bit annoying to me. If I manually recover by mount command, I can see /data visible but for just only that time. The next time the message appear again.

Anyone give me some suggestions?


BTW, how could I change the partition format from ext4 to FAT? I am using Ubuntu 10.04.

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Please post up your /etc/fstab, it will make things easier to diagnose. – evgeny Oct 16 '10 at 2:27
up vote 0 down vote accepted

Try running fsck -n /data (after it is mounted), and note if there are any errors present. If you want to fix them, re-run it without the -n flag.

To format it to FAT32, you will have to copy your files from /data elsewhere, something like ~/data is a good idea (~ is the home directory, make sure there is enough space). Then fire up the Disk Utility (located under System->Administration menu), select the /data partition and format it as FAT32.

Alternatively, if you want to keep ext4, and make it user-writeable, you can run sudo chown USERNAME:users /data -R.

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As fsck.ext4 man page says, it is not advisable to check a mounted filesystem, even when -n option is used. – enzotib Oct 16 '10 at 2:49
Great thanks. I mount it into /media/data. I can use it as FAT format from now on – aladine Oct 16 '10 at 2:50

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