HW failures on Fram storage

Update 2018-12-21: HW is replaced and /cluster file system should be 100% functional again.

We have some hardware failing on the Fram storage needing urgent replacement. For this we have to failover disks served by two Lustre servers to other Lustre server nodes.
Some slow down and short I/O hanging might be encountered on the /cluster file system during the maintenance.

We apologies for the inconvenience.