Kelly Lesperance wrote: > I’ve posted this on the forums at > https://www.centos.org/forums/viewtopic.php?f=47&t=57926&p=244614#p244614 > - posting to the list in the hopes of getting more eyeballs on it. > > We have a cluster of 23 HP DL380p Gen8 hosts running Kafka. Basic specs: > > 2x E5-2650 > 128 GB RAM > 12 x 4 TB 7200 RPM SATA drives connected to an HP H220 HBA > Dual port 10 GB NIC > > The drives are configured as one large RAID-10 volume with mdadm, > filesystem is XFS. The OS is not installed on the drive - we PXE boot a > CentOS image we've built with minimal packages installed, and do the OS > configuration via puppet. Originally, the hosts were running CentOS 6.5, > with Kafka 0.8.1, without issue. We recently upgraded to CentOS 7.2 and > Kafka 0.9, and that's when the trouble started. <SNIP> One more stupid question: could the configuration of the card for how the drives are accessed been accidentally changed? mark