3ware rmmod - Unable to handle kernel NULL pointer dereference

[Tru Huynh]

Hi,

Just for the record, if anyone running it the same problem
of trying to hotswap an IDE HD on a 3ware 6800 card.

This is the answer I have from support at 3ware.com concerning this
issue...

> Subject: 
>          RE: SOP for hot swapping a HD on a 6800/linux?
>     Date: 
>          Thu, 26 Jul 2001 17:50:50 -0700
>    From: 
>          Tom Tran <tom.tran at 3ware.com>
>      To: 
>          "'Tru Huynh'" <tru at pasteur.fr>
> 
> 
> 
> 
> Hi, 
> 
> We do not support hot swapping JBOD with the 6800 controller. To remove a bad jbod, 
> you will need to shutdown, remove the bad drive then reboot your system. Hot swap 
> support is only available with raid 1, raid 10 and raid 5. Please let me know if you 
> have further questions. Thanks. 
> 
> Tom Tran 
> Technical Support Engineer 
> 3ware, Inc. 
> 
> 
> -----Original Message----- 
> From: Tru Huynh [mailto:tru at pasteur.fr] 
> Sent: Thursday, July 26, 2001 2:12 AM 
> To: support at 3ware.com 
> Subject: SOP for hot swapping a HD on a 6800/linux? 
> 
> 
> Hello, 
> 
> Is there a safe Standard Operation Procedure to 
> hotswap a hard drive under linux when using the 6800 card?. 
> 
> We are using the 6800 in a JBOD (just a bunch of disk) mode 
> and the software raid mode 5 with 7 disks and a hotspare. 
> 
> In case one of the 7 disks fails, the hotspare disk replace 
> it on the fly and the 3w-xxxx driver de-activate the failing disk. 
> We have seen it last monday (good news the array is alive, bad news 
> how do we remove the failing disk ?). 
> 
> Your input would be most welcome. 
> 
> kernel version 2.4.7 
> 3w-xxxx Driver: 1.02.00.007 
> 
> 3DM Version 1.09.00.014 
> Monitor version: ME6X 1.01.00.028 
> Firmware version: FE6X 1.02.03.053 
> BIOS version: BE6X 1.07.01.015 
> PCB version: Rev2 
> Achip version: V4.40 
> Pchip version: V5.70 
> 

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;

<skip oops details>

-- 
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