On 02/07/2013 10:10 PM, James Dugger wrote:
> I have a software RAID10 array (4-1TB drives) that I have assembled in a
> kvm vm on Proxmox (Debian Squeeze 6.0). The HDDs were mapped to the vm
> using virtio. The array once created and started in the vm (during
> resync) started throwing an I/O error on one of the disks. It kept
> repeating the error until I stopped the array. At the host level I ran
> smartctl on all drives and they all passed inspection.
>
> The drives are not all the same brand. The array is made up of 1
> Seagate Barracuda, 2 WD Blacks, and 1 Hitachi. The Seagate is an
> Advanced Format with sector size (logical/physical) equal to
> 512B/4096B. The other drives are standard format 512B/512B. All drives
> are configured as GPT and have been partioned (using parted) to be
> aligned as follows:
>
> Number Start End Size File system Name Flags
> 1 1049kB 1000GB 1000GB udata_raid2 raid
>
> Is it possible that the physical sector size of 4096B of the Seagate
> drive is causing the problem? I don't believe that the I/O error was on
> the Seagate (I can't recall which it was on at the time).
>
> The HDD's where mapped to virtio devices using the following:
>
> qm <vmID> virtio# /dev/disk/by-id/ata-<disk name>
>
> Any thoughts?
>
> --
> James
>
I would initially suspect the AF drive, only because it's fundamentally
a little different. That could be an errant suspicion though.
I have a Seagate Barracuda ES.2 drive (500G, date 09404) which passes
all tests I've thrown at it (smartctl, badblocks), yet it throws errors
when it's put into a software raid-1. I've taken the approach which
says, "if it doesn't work that way, don't do it that way". ;) IOW, I'm
not using that drive with raid.
Can you identify which drive is throwing the errors?
(Hope to see you at tommorrow's meeting)
--
-Eric 'shubes'
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