Ubuntu 7.04 and PE SC1435

Vanush "Misha" Paturyan misha at cs.nuim.ie
Thu Sep 18 09:22:01 CDT 2008

Hi Ramiro,

You need to provide more info on the setup:
1) are / and /home local to each node or they're shared from  
centralized location somehow?
2) what does jfs error look like (you only provided ext3 error)



On 18 Sep 2008, at 11:23, Ramiro Alba Queipo wrote:

> Hello everybody:
> We have an infiniband cluster built from PE SC1435 servers under  
> Ubuntu
> 7.04 and using OpenMPI 1.2.5 (not in official distribution) with
> Mellanox infiniband cards of 20 Gb/s ( MT25204 [InfiniHost III Lx  
> HCA]).
> Both hardware tests (full DELL diagnostics) and software tests (hpl,
> NPG-MI NAS) seem to be OK, but every now and then the / and/or /home
> file systems are remounted read only by the system with many files
> corrupted. Then, the system must be reinstalled.
> I tried both jfs and ext3 file systems, but the results a similar. In
> the case of ext3 I've got:
> [46509.378381] EXT3-fs error (device sda1): htree_dirblock_to_tree:  
> bad
> entry in directory #99737: rec_len is smaller t
> han minimal - offset=0, inode=0, rec_len=0, name_len=0
> [46509.378494] Aborting journal on device sda1.
> [46509.378722] Remounting filesystem read-only
> This node has been reinstalled from scratch, the same day it failed
> I am quite confused, as if not a hardware failure, (DELL  
> diagnostics are
> OK), how can a user process corrupt the / file system.
> Any comment/advice would be very appreciated.
> Thanks in advance
> Regards
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Vanush "Misha" Paturyan
Senior Technical Officer
Comptuer Science Department
NUI Maynooth

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