The HBA is an HP H220. We haven’t really benchmarked individual drives – all 12 drives are utilized in one RAID-10 array, I’m unsure how we would test individual drives without breaking the array. Trying ‘hdparm -tT /dev/sda’ now – it’s been running for 25 minutes so far… Kelly On 2016-05-25, 2:12 PM, "centos-bounces at centos.org on behalf of Dennis Jacobfeuerborn" <centos-bounces at centos.org on behalf of dennisml at conversis.de> wrote: >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 >> > >_______________________________________________ >CentOS mailing list >CentOS at centos.org >https://lists.centos.org/mailman/listinfo/centos