3ware rmmod - Unable to handle kernel NULL pointer dereference

[Stephen Johnston]

Hi

I should have said we are not using the drives in RAID mode at all but
as independent disks.

The firmware and 3dm monitoring tools are the latest versions, namely;

Monitor version:
                                                                                              
ME6X 1.01.00.024
  Firmware version:
                                                                                              
FE6X 1.02.00.029
  BIOS version:
                                                                                              
BEXX 1.07.00.009
  PCB version:
                                                                                              
Rev2
  Achip version:
                                                                                              
V4.40
  Pchip version:
                                                                                              
V5.70
  Model:
                                                                                              
6800
  Unit count:      8


Tru Huynh wrote:
> 
> Hello,
> 
> We are installing the same hardware here.
> Rh7.1 standard install and SGI-xfs.
> I have not tried your harddrive swapping but
> I would get the latest firmware and drivers upgrade...
> 
> There are some serious issues with raid5 with
> version prior to firmware release 6.6 and driver 6.7
> 
> firmware and driver download from:
> http://www.3ware.com/support/3warednload_6000_driver.asp
> and 3dm v7.11 from:
> http://www.3ware.com/support/3warednload_3dm_driver.asp
> 
> 1)quote from http://www.3ware.com/support/:
> " 3ware has determined that there is an IRQ priority conflict with
> Intel's 815EEA motherboard as it relates RAID applications.
> This is shown when there is a failure to successfully boot
> an Escalade array using this motherboard.
> NOTE: Intel is aware of the problem and is working on a solution.
> 
> 3ware recommends the use of the older Intel CA810E board, or any Intel
> motherboard using Intel's 100mhz 440BX chipset until this problem is
> resolved by Intel."
> 
> 2) quote from http://www.3ware.com/support/raid5TechBulletin.shtml
> 
> "3ware has found a bug in our RAID 5 code that can cause
> file system errors resulting in possible loss of data....
> 
> 3ware products affected: Escalade 6400, 6410 and 6800
> 3ware software versions affected: 6.5 and 6.6
> RAID level affected: RAID 5
> Operating systems affected:
>         Known: Linux with default ext2 file system"
> 
> 3) quote from 3w-xxxx.c (the one with RH7.1 is version 1.02.00.004)
>    1.02.00.005 - Allocate bounce buffers and custom queue depth for
> raid5 for
>                  6000 and 5000 series controllers.
>                  Reduce polling mdelays causing problems on some
> systems.
>                  Fix use_sg = 1 calculation bug.
>                  Check for scsi_register returning NULL.
>                  Add aen count to /proc/scsi/3w-xxxx.
>                  Remove aen code unit masking in tw_aen_complete().
>    1.02.00.006 - Remove unit from printk in tw_scsi_eh_abort(), causing
>                  possible oops.
>                  Fix possible null pointer dereference in
> tw_scsi_queue()
>                  if done function pointer was invalid.
> 
> Best regards,
> 
> Tru
> 
> Stephen Johnston wrote:
> >
> > Hi
> >
> > We have a 3ware Escalade 6800 8 port ide card which the o/s sees as
> > scis, it works fine, except when you put a new disk onto the card.
> >
> > With 8 disks if we
> >
> > rmmod 3w-xxxx
> > remove 2 disks
> > swap them
> > modprobe 3w-xxx
> >
> > no problems, the card see the disks have been swapped and its fine.
> >
> > However if we use a new disk the card didnt know about to begin with
> >
> > rmmod 3w-xxxx
> > remove a disk
> > replace with a new disk
> > modprobe 3w-xxx
> >
> > there is a segmentation fault with the following error;
> >
> > 3w-xxxx: tw_poll_status(): Flag 0x40000 not found.
> > Unable to handle kernel NULL pointer dereference at virtual address
> > 00000036
> >  printing eip:
> > e08dc162
> > pgd entry ddfb7000: 0000000000000000
> > pmd entry ddfb7000: 0000000000000000
> > ... pmd not present!
> > Oops: 0000
> <...>
> --
> Dr Tru Huynh          | Bioinformatique Structurale
> mailto:tru at pasteur.fr | tel/fax +33 1 45 68 87 37/19
> Institut Pasteur, 25-28 rue du Docteur Roux, 75724 Paris CEDEX 15 France

-- 
Stephen Johnston (NGAST/Beowulf Project)           Phone: +49 89
32006563
European Southern Observatory                      Fax  : +49 89
32006380
Karl-Schwarzschild-Strasse 2
D-85748 Garching bei Muenchen                      http://www.eso.org
--