On Saturday July 1, reuben-lkml@xxxxxxxx wrote:The two raid-1 disks are the Seagate ST380817AS SATA disks on the onboardmd: super_written gets error=-5, uptodate=0'5' == EIO
messages on the console that didn't seem to want to stop...
We try to write the superblock and we get EIO - something wrong somewhere.
What sort of device are we writing to here? What controller, what
driver (if you know), what drives?
controller. The motherboard is an Intel D945GNT motherboard. See dmesg..
Can you write to the device without using md?Yes.
So... When md writes a superblock to this device, it reliably (or
close to reliably) gets EIO. When mkfs writes, it works fine.
Only difference I can think of is still barriers... Does this patch
make any difference?