What is the HBA the drives are attached to? Have you done a quick benchmark on a single disk to check if this is a raid problem or further down the stack? Regards, Dennis On 25.05.2016 19:26, Kelly Lesperance wrote: > [merging] > > The HBA the drives are attached to has no configuration that I’m aware of. We would have had to accidentally change 23 of them ☺ > > Thanks, > > Kelly > > On 2016-05-25, 1:25 PM, "Kelly Lesperance" <klesperance at blackberry.com> wrote: > >> They are: >> >> [root at r1k1 ~] # hdparm -I /dev/sda >> >> /dev/sda: >> >> ATA device, with non-removable media >> Model Number: MB4000GCWDC >> Serial Number: S1Z06RW9 >> Firmware Revision: HPGD >> Transport: Serial, SATA Rev 3.0 >> >> Thanks, >> >> Kelly > > > On 2016-05-25, 1:23 PM, "centos-bounces at centos.org on behalf of m.roth at 5-cent.us" <centos-bounces at centos.org on behalf of m.roth at 5-cent.us> wrote: > >> 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 >> >> _______________________________________________ >> CentOS mailing list >> CentOS at centos.org >> https://lists.centos.org/mailman/listinfo/centos > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos >