facebook/flashcache — Issue #40: EXT4-fs Errors in /var/log/messages
Author: mrwister
Created: 2011-11-23 10:45:06+00:00
State: open

Hi,

We are running Flashcache on a server with the following disk configuration:

2 x SATA 2TB Drives -> 1 x Linux RAID0 -> Flashcache SSD (120GB)

So we have 2x SATA drives, made into a Linux software RAID 1 and then Flashcache sitting on top of that.
The server is running a virtualisation kernel (OpenVZ) and was compiled against that source.

In the /var/log/messages log we are often getting messages like:

EXT4-fs error (device dm-3): ext4_mb_generate_buddy: EXT4-fs: group 13888: 23881 blocks in bitmap, 23882 in gd

dm-3 is the SSD caching device. It is set as a caching device without any partitions.

Any ideas?

Many Thanks,
Mark