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
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