Hdparm didn’t get far: [root at r1k1 ~] # hdparm -tT /dev/sda /dev/sda: Timing cached reads: Alarm clock [root at r1k1 ~] # On 2016-05-25, 2:44 PM, "Kelly Lesperance" <klesperance at blackberry.com> wrote: >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 >