On Thu, 5 Dec 2013 21:37:53 +0200 Jarmo Jaakkola <netbsd-us...@roskakori.fi> wrote:
> Recently I've had to twice try to reconstruct a RAID set. Both of > these times lead to a system hang needing a hard reset. > > I wrote a whole email about my problem. Then it occurred to me that > it might be just a stupid user error, so let's get that out of the way > first. From raidctl(8) manual page: > "Note as well that RAID 1 sets are currently limited to only 2 > components." > > Is this still valid (NetBSD 6.1.2)? Yes. > What would this actually mean? It means you should only use 2 components for a RAID 1 set, as using 3 or more is not currently supported. > Should raidctl barf when trying to create a mirrored set with more > than two components? It probably should, but I'm betting it doesn't. What does your RAID config file look like? What does 'raidctl -s' say for the RAID set? > Or would you get problems like I just did? Probably.... :( Later... Greg Oster > Because the RAID 1 set whose reconstruction causes a system hang was > created with three components. > > Below is the original email I was going to send describing the problem > in a bit more detail, in the case that this is not just a PEBKAC. > > --8<--8<--8<-- > > The first time was for trying to add an initially missing component to > a set. Couldn't get it to work, so I just worked around doing the > full set from the beginning. This works fine. > > After the set was created I managed to wiggle the connector loose from > one of the disks and tried to boot with that, getting a failed > component. Trying to reconstruct the set I got a system hang again. > > So I would do: > # raidctl -a comp dev > # raidctl -F absent > or > # raidctl -R comp dev > to start reconstructing the set. Then a minute or two afterwards > the system hangs. If I look at the output of > # raidctl -S dev > I see > 1% |* | ETA 00.00 / > with the "i'm doing something" indicator scrolling right up until > the system hangs. The ETA never updates from 00.00. Also > # iostat -x -w5 > shows almost non-existant disk activity and CPU usage is low too. > > This is a two core amd64 with NetBSD 6.1.2. The problematic set is > a small three component RAID 1 set for booting. Rest of those disks > are used for cgds that form a RAID 5. Then there are three other > disks which form yet another cgd + RAID 5. > > Now the question is, how do I go about getting some more information > about this? I'm not happy to send just this "it doesn't work" > as a bug report. > > --8<--8<--8<-- > > -- > Jarmo Jaakkola
