Recovering files after a crash

Ruben de Groot mail25 at bzerk.org
Tue Aug 18 13:32:46 UTC 2009


On Tue, Aug 18, 2009 at 09:30:15AM +0200, Erik Norgaard typed:
> Hi:
> 
> I woke op to a crash this morning after a powerfailure, and now dmesg 
> shows this:
> 
> WARNING: / was not properly dismounted
> GEOM_LABEL: Label ufsid/442f8ac1c0db9af2 removed.
> GEOM_LABEL: Label for provider ad6s1a is ufsid/442f8ac1c0db9af2.
> GEOM_LABEL: Label ufsid/442f8ac5a7fa5dda removed.
> GEOM_LABEL: Label for provider ad6s1d is ufsid/442f8ac5a7fa5dda.
> GEOM_LABEL: Label ufsid/442f8ac950b22b46 removed.
> GEOM_LABEL: Label for provider ad6s1e is ufsid/442f8ac950b22b46.
> GEOM_LABEL: Label ufsid/442f8ad3e5c88ab8 removed.
> GEOM_LABEL: Label for provider ad6s1f is ufsid/442f8ad3e5c88ab8.
> GEOM_LABEL: Label ufsid/442f8ad59f647596 removed.
> GEOM_LABEL: Label for provider ad6s1g is ufsid/442f8ad59f647596.
> GEOM_LABEL: Label ufsid/442f8ae2200a8064 removed.
> GEOM_LABEL: Label for provider ad6s1h is ufsid/442f8ae2200a8064.
> GEOM_LABEL: Label ufsid/442f8ac1c0db9af2 removed.
> GEOM_LABEL: Label ufsid/442f8ac5a7fa5dda removed.
> GEOM_LABEL: Label ufsid/442f8ac950b22b46 removed.
> GEOM_LABEL: Label ufsid/442f8ad3e5c88ab8 removed.
> GEOM_LABEL: Label ufsid/442f8ad59f647596 removed.
> GEOM_LABEL: Label ufsid/442f8ae2200a8064 removed.
> 
> The problem is that I have no idea which files were affected.

According to this, no file was affected.

> So, now some questions:
> 
> First, how do I determine which files were corrupted? And how do I 
> recover these files?
> 
> Second, / is mostly read-only, in fact, I can't think of any file on 
> that partition that should be modified at all: /tmp is on a separate 
> partition, I have source files on /usr/local rather than the default, in 
> fact, only root user files are modified during a normal day, but it's 
> been days since I logged in as root.
> 
> How do I protect read-only files from being corrupted in the first 
> place? I have tried mounting / read-only but that gave a load of other 
> problems.
> 
> Thanks, Erik
> 
> 
> -- 
> Erik N?rgaard
> Ph: +34.666334818/+34.915211157                  http://www.locolomo.org
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