How can I solve "Check your disks!"?

Asked by Radek Liska

Since I installed SpaceView I have only one disk in the machine and constantly see "Check your disks!", no other storage (pen drive/phone) is connected. I tried to mount all available partitions of that disk, didn't help. If it has any impact, here is my disk layout:

/dev/sda1 - Windows partition (NTFS - FUSE mounted)
/dev/sda3 - testing Linux partition (ext4)
/dev/sda2 - extended partition containing the following 4:
  /dev/sda6 - / (ext4)
  /dev/sda7 - data partition (NTFS - FUSE mounted)
  /dev/sda8 - data partition (ext4)
  /dev/sda5 - swap

I also tried to set and save all aliases, but I'm still getting "Check your disks!"

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Radek Liska
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Radek Liska (radekliska) said :

OK, I understand now :-) Removed a large VirtualBox machine and suddenly the warning disappeared, so it was caused by a filesystem being over 90% full, I just didn't get the message.
I'll know in the future, but maybe it would help to be a bit more explicit in the message that there is no error, just an almost full partition.