Hi, We are experiencing allot of filesystem issues, for example: kernel: EXT3-fs error (device drbd0): ext3_free_blocks_sb: bit already cleared for block 5776787 These occur randomly after several consequative failovers between the cluster nodes. We are using drbd with ext3 filesystem with a write-through controller. Are there any preferences what elevator we should use? According to http://www.drbd.org/users-guide/s-latency-tuning.html both cfq/deadline are fine with preference to deadline. But both re-order writes, right? possibly breaking file system/journal on standby. Please advise, Setup drbd with ext3 filesystem write-through controller Two nodes cluster Physical Appliances CentOS 6.2 with 2.6.32-220 kmod-drbd83-8.3.12-1.el6.i686 Thanks, Oren
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