Tag Archives: cryptsetup
Rebuilding a RAID1 mirror with a Truecrypt container on it may require some additional steps. I guess that since no filesystem is visible on the disk, the RAID array is having trouble determining which disk to rebuild from. If your neighbourhood have had a blackout, the filesystem in the container is probably dirty anyway. This is how I take care of the matter on my external ICY Box IB-RD4320 USB chassi.
The manual for ICY Box IB-RD4320 USB chassi have this table regarding the meaning of the LED lamps on the unit:
Solving disk problems is a little more complicated when devices are encrypted. You need to keep in mind that a filesystem on an encrypted device can’t be seen unless the device is decrypted. Here is a few problems I’ve come in touch with, together with solutions that have worked for me.
Error unmounting a volume
Error message which may occur when trying to unmount truecrypt volume:
Trying to remove the volume with cryptsetup gives a similar message:
Device /dev/mapper/truecrypt1 is busy.
As the error messages implies, something is keeping the volume open. If lsof doesn’t show anything, it might be an active NFS export keeping it busy.