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disks perfomance issues

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linux-howto

http://www.unix.com – Hi, All I'm trying to figure out why on very similar hosts with the same settings disks perfomance is different. Linux 2.6.16.60-0.69.1-smp #1 SMP Fri Sep 17 17:07:54 UTC 2010 x86_64 x86_64 x86_64 GNU/Linux disks are in similar array, everything looks good from the system site, but perfomance is different: 1 diffrence is on the host with good perfomance dmesg |grep cciss returns nothing, on the other JBD: barrier-based sync failed on cciss/c0d0p1 - disabling barriers JBD: barrier-based sync failed on cciss/c0d0p6 - disabling barriers JBD: barrier-based sync failed on cciss/c0d0p5 - di (HowTos)