[DRBD-user] System lockup with DRBD

chambal 2iow-li6l at dea.spamcon.org
Fri Oct 29 10:50:12 CEST 2010

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

chambal <2iow-li6l at dea.spamcon.org> wrote:

>I have a pair of VIA M800 Mini-ITX with SSD (one OCZ
>Vertex-Turbo, one Intel), and CentOS 5.5 with current patches.
>When I have DRBD active on both units, at some random point but
>always within one day, one of the units has completely locked up.
>In all but one case, it's the Primary unit.
>When I say locked up, I mean the PC is completely frozen -
>keyboard is dead (can't toggle numlock, and Alt-SysRq - which is
>enabled - doesn't work), there's no kernel panic dump on the
>physical console, there's no response to tapping the power
>switch, and it can't be pinged.  There's nothing in the syslog
>after it's forcibly rebooted.
>Possibly important clue: the front panel LED for hard disk
>activity is solidly on when the failure occurs.
>When I have DRBD running on only the active (Primary) unit (did
>"service drbd stop" on the inactive (Secondary) unit), this
>lockup never occurs.
>There is not very much disk read/write activity on the shared
>partition.  Both units are on the same local private LAN segment.
>Originally I was using DRBD 8.0.1 (which didn't have this problem
>on different much older hardware and OS), then updated to DRBD
>8.0.16, then yesterday to 8.3.9.  No difference in the problem.
>Because the kernel is 2.6.18-194.17.1.el5 I still have to use a
>kernel module.
>I am rather lost on how to proceed in tracking down the cause of
>this problem or a solution.

I received an email response from someone running the exact same CentOS
5.5 and kernel version, and DRBD 8.3.9.  So this would seem to point to
the hardware, or an interaction between the hardware and software.

Has anyone run DRBD on a VIA EPIA-M800 Mini-ITX?

Has anyone run DRBD on SSD?

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