On 08.01.2024 16:44, Larry Rosenman wrote:
So, if this is a mirror, then ada0 blank and ada1 with good data, in theory
you should be fine. However, perhaps ZFS is finding that there's an error from
ada1 for real. Does all of ada1 read with a simple dd?
Yep, it is read with dd, I've checked it
Not sure about the losing devices you described later on.
> ZFS: i/o error - all block copies unavailable
> ZFS: can't read MOS of pool zroot
>
>
> To be honest, I thinks there is something else. Because sequence of
events were (sorry, too long, but I think, tht every detail matters here):
Yea. There's something that's failing, which zio_read is woefully under
reporting for our diagnostic efforts. And/or something is
getting confused by the blank disk and/or the partially resilvered disk.
My theory, that something is confused when one disk is 512/4096 and other is
512/512.
I want to check it on VM, but can not find VM that both (1) allows CMS boot
and (2) allows to configure logical and physical sector of virtual HDD.
bhyve could configure sector sizes, but doesn't support BIOS, and VBox and
qemu-system can not emulate sector sizes (or I can not google proper
configuration).
When I first saw this, I wonder what ashift is set to on the pool?
old pool was with ashift=9, but new one is with ashift=12.
I wonder if the ashif=9 caused the issue when you added the 4Kn disk?
I'm looking for ways to check this hypothesis without additional hardware.
--
// Lev Serebryakov
