[Lustre-discuss] how to replace a bad OST.

[Lundgren, Andrew]

I thought it worked, I seem to have lost the content of my entire test cluster except the subdirectories...

> -----Original Message-----
> From: lustre-discuss-bounces at lists.lustre.org [mailto:lustre-discuss-
> bounces at lists.lustre.org] On Behalf Of Lundgren, Andrew
> Sent: Tuesday, March 18, 2008 10:05 AM
> To: Mailer PH; Lustre-discuss at lists.lustre.org
> Subject: Re: [Lustre-discuss] how to replace a bad OST.
>
> Well,
>
> That did work, I also had to unmount all of the OSTs and clients to get it
> to function however.
>
> Does anyone know, is there a way to do this w/o resetting the entire file
> system?
>
> --
> Andrew
>
> > -----Original Message-----
> > From: lustre-discuss-bounces at lists.lustre.org [mailto:lustre-discuss-
> > bounces at lists.lustre.org] On Behalf Of Mailer PH
> > Sent: Monday, March 17, 2008 12:07 PM
> > To: Lustre-discuss at lists.lustre.org
> > Subject: Re: [Lustre-discuss] how to replace a bad OST.
> >
> > I run into similar problem few weeks ago .
> >
> > You need to run :
> > tunefs.lustre --writeconf /dev/.............
> >
> > On MDT/MGS after unmounting it , maybbe there is another way to do that
> > without unmounting MDT/MGS but im not sure .
> >
> > Cheers .
> >
> >
> >
> >       ----- Original Message -----
> >       From: Lundgren, Andrew
> >       To: 'Lustre-discuss at clusterfs.com'
> >       Sent: Monday, March 17, 2008 7:29 PM
> >       Subject: [Lustre-discuss] how to replace a bad OST.
> >
> >
> >       I am trying to learn how to replace a defective OST with a new
> one.
> > Assuming the old OST can not be salvaged.
> >
> >
> >
> >       I have a test cluster that I am working on.
> >
> >
> >
> >       I deactivated the volume on the MGS using:
> >
> >
> >
> >       lctl conf_param content-OST0002-osc.osc.active=0
> >
> >
> >
> >       I unlinked all of the bad files by finding the ones on the bad
> > volume.
> >
> >
> >
> >       I formatted a fresh OST using the index number of the bad device:
> >
> >
> >
> >       mkfs.lustre --reformat  --fsname content --ost --
> > mgsnode=4.248.52.81 at tcp0 --param="failover.mode=failout" --index=02
> > /dev/md6
> >
> >
> >
> >       Then I tried to mount the freshly formatted OST into the cluster.
> >
> >
> >
> >       Unfortunately, I end up with an error:
> >
> >
> >
> >       mount.lustre: mount /dev/md6 at /lustre_raw_ost_one failed:
> Address
> > already in use
> >
> >       The target service's index is already in use. (/dev/md6)
> >
> >
> >
> >       How can I re-use the index number to prevent always having a
> "dead"
> > point in my cluster?
> >
> >
> >
> >       Thanks!
> >
> >
> >
> >       --
> >
> >       Andrew
> >
> >
> >
> > ----------------------------------------------------------
> > Outgoing messages are virus free checked by NOD32 system
>
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