What is EXT4-fs error (device md0): ext4_mb_generate_buddy:739: group 10770, 0 clusters in bitmap, 32768?

Question

I have a multidimensional array in swift like this:

arr = [[1,2],[1,2],[3,4],[3,4],[4,5]]

How do I remove duplicates from this array so that my final array is:

[[1,2],[3,4],[4,5]]

I'm a swift newbie. I know I can write a function to remove the dupes, but I wanted to know if there was a way to do this directly.

Solution

You should try umounting the disk and running fsck on it. What does this command show?

cat /proc/mdstat

Your disks should be in sync so you can repair the filesystem.

Comments

[malisokan]

Okay I think the resync and fsck command fixed the problem. The errors do not show up again.

[malisokan]

Okay I think the resync and fsck command fixed the problem. The errors do not show up again.

[superboot]

/proc/mdstat is a status file for the mdadm multi-disk-admin package used for managing RAID. Unless you're doing something very un-ordinary, you have no RAID on a raspberry pi, and this doesn't apply. The advice is simply to be sure that the RAID array's data is synced between the drives before attempting a filesystem level repair.

[Eric]

You've second guessed and didn't answer answer the question. The question is what does the message mean, why is it happening. Instead you're telling how to fix it.