I don't know yet if this is an ext3, quota or drbd issue, but I'll ask anyway. I am building a HA NFS server using two Dell-1750's and drbd. I have ext3 filesystem with quota built on drbd device running over 200Gb disk partition (hardware raid0+1), drdb-mirrored across servers. The kernel is 2.4.25, so hopefully quota deadlock should not be a problem (it was on 2.4.24). Now, the setup mostly works fine. But if you actively use the filesystem for some time (hour of copying a large tree over NFS), then then try 'sync' command, the latter runs very long (10 minutes or more), eating 99% CPU according to top, and the system becomes very sluggish (leading to stalled replication, heartbeat misbehavior) and in fact unusable. Any ideas why this happens and/or suggestions for further investigation? Eugene
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