- BTRFS RAID5: unrepaired sectors detected
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btrfs
· Finding the broken file While scrubbing my BTRFS RAID 5 filesytem for the first time in four years the scrub got canceled due to the following error according to dmesg:
BTRFS error (device sdc1): unrepaired sectors detected, full stripe 15994477215744 data stripe 0 errors 4
This message sounds scary and normally BTRFS should be able to recover the data. Why this did not work will stay unclear for now. I had two or three unclean shutdowns in all these years so maybe I triggerd one of the main bugs they always warn you about.
- Migrating from mdadm RAID 6 to btrfs RAID 5
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btrfs
· Please note: This blog post is actually pretty boring. If you are expecting some btrfs RAID 5 or 6 secrets you’ll be disappointed!
End of 2013 after I started working I bought my first Synology NAS with two 3 TByte drives in a RAID 1. I quickly filled it and ran out of storage space. I had a look at Synology devices with four or more slots but they were too expensive for just doing storage tasks.
