Lustre discuss - Aug 2009 - Replacing files when an OST has crashed

Hello,

we are trying to cut out a broken (definitly dead) OST from the lustre system
and want repalce the files on this OST from our tape archive.
Trying to overwrite a file results in "Input/output Error"  no matter
if the OST is marked active/inactive.

i.e. MDS: 
lctl --device 17 conf_param scia-OST000c.osc.active=0/1
or
lctl set_param osc.scia-OST000c-osc.active=0/1


In the manual i cannot find a hint on how to manage this situation.
What is the proper way to overwrite/delete the entries so that the file can be
replaced ?

Thanks and Regards
Heiko


lustre version on MDS and OST:
build:  1.6.6-19700101010000-PRISTINE-.usr.src.linux-2.6.22.19

lustre version on clients:
build:  1.6.5.1-19700101010000-PRISTINE-.usr.src.linux-2.6.22.19-2.6.22.19
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Answering myself.

''unlink'' seems to remove the DIR entries. It still throws an
I/O Error (because the OST is missing) but at least the DIR on the MDS gets
cleaned up.

Regards
Heiko


On Mittwoch 26 August 2009 12:06:59 Heiko Schr?ter
wrote:
> Hello,
> 
> we are trying to cut out a broken (definitly dead) OST from the lustre
system and want repalce the files on this OST from our tape archive.
> Trying to overwrite a file results in "Input/output Error"  no
matter if the OST is marked active/inactive.
> 
> i.e. MDS: 
> lctl --device 17 conf_param scia-OST000c.osc.active=0/1
> or
> lctl set_param osc.scia-OST000c-osc.active=0/1
> 
> 
> In the manual i cannot find a hint on how to manage this situation.
> What is the proper way to overwrite/delete the entries so that the file can
be replaced ?
> 
> Thanks and Regards
> Heiko
> 
> 
> lustre version on MDS and OST:
> build:  1.6.6-19700101010000-PRISTINE-.usr.src.linux-2.6.22.19
> 
> lustre version on clients:
> build:  1.6.5.1-19700101010000-PRISTINE-.usr.src.linux-2.6.22.19-2.6.22.19
> 
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