[Dunder-users] /nobackup/rossby9 /nobackup/smhid4 available again

[Per Lundqvist]

/nobackup/rossby9 is now available again on Tornado and Dunder.
/nobackup/smhid4 is available again on Dunder.

1. All data has been restored onto freshly formatted lustre filesystems, 
   and from what we can see there has not been any data corruption for the 
   users.

2. The downtime has been too long. We apologize for this - but the matter 
   of fact is that handling this large amount of data takes a lot of time, 
   and we want to, as far as possible, be sure that the data integrity is 
   left intact. There has been a couple of problems along the road though 
   that have delayed the availability of the filesystems further: software 
   bugs in tape managment software, bugs in lustre tools and bugs in 
   storage managment software and also additional hardware failures. The
   bugs will be reported upwards to the appropriate vendors.

3. We are now scheduling upgrades of all the lustre clients (beginning on 
   Dunder). We will later on upgrade the lustre clients on Tornado and the 
   lustre servers (which affects all lustre filesystems on Tornado and 
   Dunder) - more information on this later.

4. For those of you using lustresetstriped, lustresetnotstriped and 
   lustregetstriped. All directories and files have been reset to not 
   striped (not striped has always been the default unless explicitly 
   changed by you). If you need help making files or directories striped 
   again, feel free to contact smhi-support at nsc.liu.se.

/Per

-- 
Per Lundqvist

National Supercomputer Centre
Linköping University, Sweden

http://www.nsc.liu.se