[PROBLEM] reproduceable storage errors on high IO load

["Lars Täuber" <taeuber@bbaw.de>]

Hi,

ok, I see. No one on the list feels cognizant.
Please tell me where to report this problem. linux-kernel@…?

Thanks
Lars


Am Tue, 31 May 2011 11:34:52 +0200
Lars Täuber <taeuber@bbaw.de> schrieb:

> Hi there,
> 
> I have a problem with a SW-RAID6. It is reproduceable also after changing the hole hardware.
> I startet with a Suse 11.2. The problem occured during writing much data to the array (high io load).
> This is hopefully the right ML for my problem. Otherwise please excuse me and point me the the right ML.
> 
> 
> Then I changed the PSU. Still errors on high load.
> Then I changed the sata controller (Sil 3114 - sata_sil) with one with a different chipset (driver: sata_mv). Still errors on high load.
> Then I changed the disk enclosure and all cables. Still errors.
> Then I changed the mainboard (tyan opteron) with one from supermicro (H8SCM-F) with 6-core opteron. Still errors.
> Then I changed to ubuntu 10.04 -> 10.10. Still errors
> Then I tried different schedulars (noop,anticipatory,cfq,deadline). Still errors.
> Then I tried kernel options: noapic + acpi=off without luck.
> Then I changed the sata controller with a areca sas (driver: mvsas). Still errors.
> Then I tried some different hdds (orig: Western Digital WDC WD2002FYPS + WDC WD2003FYYS; new: Seagate ST3320620NS). Still errors.
> Then I tried some different kernel versions from ubuntu without luck:
> 2.6.32-22-server
> 2.6.35-25-server
> 
> Then I tried self compiled kernels without luck:
> 2.6.35.13
> 2.6.38.6
> 2.6.39: same problem occurs but later
> 
> The current configuration:
> - tested only 64-bit kernels
> - Supermicro H8SCM-F (AMD SR5650+SP5100) with 6-core opteron
> - Areca (non-raid) ARC-1300ix-16 sas controller
> - SW-RAID6 over 8 Western Digital HDDs (sone WDC WD2002FYPS + some WDC WD2003FYYS)
> - redundant PSU
> 
> How to reproduce my problem:
> mdadm -C /dev/md3 -l6 -n8 /dev/sd[c-h] missing missing
> (the two missing hdds prevent this raid from initial sync)
> 
> Everything is just fine till yet.
> Now produce high io-load:
> mke2fs -j /dev/md3
> 
> The detailed history (search for Lars to get my posts):
> https://bugs.launchpad.net/ubuntu/+bug/550559
> 
> The error messages changed a bit during the kernel versions.
> The nearly complete dmesg output:
> https://launchpadlibrarian.net/72325163/20110524.dmesg.out
> 
> Is there something I do wrong? Could someone help me to debug this?
> Thanks
> Lars
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