Re: 2850 very slow cp compared to identical hardware
On Fri, December 10, 2010 22:22, Jefferson Ogata wrote: > On 2010-12-10 20:40, Brian A. Seklecki wrote: > 5A2D BIOS H433 and the fast one has fw 516A and BIOS H418. RAID adapter and container settings match across systems, as do e2fstune -l >> >> Just to confirm; same cache settings for each volume? > > And same RAID battery state? > Will have to check on Monday--my VPN token seems to have given up the ghost. Luckily I'm not on call. I'm pretty sure I drilled into everything on the problem server and would have noticed a battery anomaly, but can't specifically recall checking it. If bad, that would negate the writeback setting, I guess. ___ Linux-PowerEdge mailing list Linux-PowerEdge@dell.com https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
Re: 2850 very slow cp compared to identical hardware
On 2010-12-10 20:40, Brian A. Seklecki wrote: 5A2D BIOS H433 and the fast one has fw 516A and BIOS H418. RAID adapter and container settings match across systems, as do e2fstune -l > > Just to confirm; same cache settings for each volume? And same RAID battery state? ___ Linux-PowerEdge mailing list Linux-PowerEdge@dell.com https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
Re: 2850 very slow cp compared to identical hardware
> >> 5A2D BIOS H433 and the fast one has fw 516A and BIOS H418. RAID > >> adapter and container settings match across systems, as do e2fstune -l Just to confirm; same cache settings for each volume? BTW, the 8th gen PERC4 firmware seems to somehow be related to drive firmware (flashes the drives when it flashes the controller, or something like that) ~BAS ___ Linux-PowerEdge mailing list Linux-PowerEdge@dell.com https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
Re: 2850 very slow cp compared to identical hardware
On Fri, December 10, 2010 12:16, Mark Foster wrote: > On 12/10/2010 07:33 AM, J. Epperson wrote: >> Can anyone shed any light on this for me? BTW, the only differences >> I'm aware of on the systems is that the slow system has PERC firmware >> 5A2D BIOS H433 and the fast one has fw 516A and BIOS H418. RAID >> adapter and container settings match across systems, as do e2fstune -l >> settings. No hardware errors showing up in /var/log/messages or dmesg. >> > > I have a hunch you'll want to check the output of blockdev --report > /dev/sda on each system > > It might be a simple as running this on the slower one... blockdev > --setra 32768 /dev/sda > Thanks for the input. Both look the same: RORA SSZ BSZ StartSec SizeDevice rw 256 512 4096 0 143114240 /dev/sda I set to 32768 on both and re-did my dd test, but with pretty much the same results, about a 2.5X difference, compared to the ~4.5X reported by the DBA using cp command. [r...@p1fi prod11idata]# time dd if=/dev/zero of=/u03/tmp/zero bs=4096 count=50 50+0 records in 50+0 records out real0m16.640s user0m0.268s sys 0m7.955s [r...@d1fi prod11idata]# time dd if=/dev/zero of=/u03/tmp/zero bs=4096 count=50 50+0 records in 50+0 records out real0m42.660s user0m0.302s sys 0m10.947s ___ Linux-PowerEdge mailing list Linux-PowerEdge@dell.com https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
Re: 2850 very slow cp compared to identical hardware
On 12/10/2010 07:33 AM, J. Epperson wrote: > Can anyone shed any light on this for me? BTW, the only differences I'm > aware of on the systems is that the slow system has PERC firmware 5A2D > BIOS H433 and the fast one has fw 516A and BIOS H418. RAID adapter and > container settings match across systems, as do e2fstune -l settings. No > hardware errors showing up in /var/log/messages or dmesg. I have a hunch you'll want to check the output of blockdev --report /dev/sda on each system It might be a simple as running this on the slower one... blockdev --setra 32768 /dev/sda -- Mark D. Foster http://mark.foster.cc/ | http://www.freegeekseattle.org/ ___ Linux-PowerEdge mailing list Linux-PowerEdge@dell.com https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
