ceph-disk and mkfs.xfs are hanging on SAS SSD

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Hi,

I am using Ceph Jewel on Ubuntu 16.04 Xenial, with SAS SSD and driver=megaraid_sas


"/usr/bin/python /usr/sbin/ceph-disk prepare --osd-uuid <uuid> --fs-type xfs /dev/sda3" is hanging. This command is start "mkfs.xfs -f -i size=2048 -- /dev/sda3" which is actually hanging. The system becomes very slow once mkfs.xfs is started. This command never completes. 


Is anyone aware of this issue and have any suggestions on how to fix this hang? Please let me know if additional information is needed.


Thanks,

Rajesh 





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