[dm-devel] DM manual failback doesn't work on RHEL5
Malahal Naineni
malahal at us.ibm.com
Wed Aug 25 17:44:43 UTC 2010
Yanqing_Liu at Dell.com [Yanqing_Liu at Dell.com] wrote:
> Hi all,
>
> In our testing with DM RDAC stack with RHEL 5 (including 5.5 and 5.4), we
> found that manual failback doesn't work as expected.
>
> What we did is to connect the host to Dell PowerVault 3200/i array. After
> everything is configured, we changed "failback" value for our device from
> "immediate" to "manual". Then the host is rebooted for the new value to
> take effect. However, automatic failback still happens once failed path is
> restored. It seems failback "manual" doesn't work.
There are few cases where you need to re-build your initrd if you change
multipath.conf file. What does the loaded table say? Does it indicate
that the failback mechanism is 'manual'?
Thanks, Malahal.
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