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Re: Supermicro SAS controller

On Tue, 01 May 2012 11:53:27 +0000, Ramon Hofer wrote:

> I'm using Debian Squeeze and would like to use a Supermicro
> AOC-SASLP-MV8 as controller for a software raid.
> Unfortunately the system crashes when I try creating a filesystem on the
> md device.

JFYI, Google reports tons of problems with that card using mvsas driver 
in linux, maybe you should consider using a different controller :-(


> And I can access the disks. Create an ext3 and ext4 filesystem on them
> seperately. But they don't like be be in the raid.
> When the system crashed I got this dmesg but I can't find anything in
> there:
> http://pastebin.com/raw.php?i=ZFdkcS8p

There are some interesting entries there:

[   12.028337] md: md1 stopped.
[   12.029374] md: bind<sdc>
[   12.034155] md: bind<sdd>
[   12.034275] md: bind<sdb>
[   12.034986] raid5: device sdb operational as raid disk 0
[   12.034988] raid5: device sdc operational as raid disk 1
[   12.035246] raid5: allocated 3230kB for md1
[   12.035270] 0: w=1 pa=0 pr=3 m=1 a=2 r=3 op1=0 op2=0
[   12.035272] 1: w=2 pa=0 pr=3 m=1 a=2 r=3 op1=0 op2=0
[   12.035275] raid5: raid level 5 set md1 active with 2 out of 3 devices, algorithm 2
[   12.035378] RAID5 conf printout:
[   12.035380]  --- rd:3 wd:2
[   12.035382]  disk 0, o:1, dev:sdb
[   12.035383]  disk 1, o:1, dev:sdc
[   12.035406] md1: detected capacity change from 0 to 4000794542080
[   12.035940] md1: unknown partition table

Those are related to md1 and your raid5 volume.

[   12.244499] PM: Starting manual resume from disk
[   12.244502] PM: Resume from partition 8:3
[   12.244503] PM: Checking hibernation image.
[   12.244599] PM: Error -22 checking image file
[   12.244602] PM: Resume from disk failed.

And this comes from a resuming operation. Do you hibernate your system?

> On the screen I saw this:
> http://666k.com/u.php
> (Sorry it's a photograph)

I can't load the image :-?

> What else can I do?

I would report it, although I'm afraid this is a well-known issue. 

Maybe you can try with an updated kernel to see if there's any imprevement 
with the driver (mvsas) but to be sincere, I would be very reluctant in 
setting a raid 5 level with a hard disk controller that is not rock-solid, 
you are exposing your system to a data loss :-/

> There are Red Hat ad SUSE drivers and firmware on the Supermicro
> homepage. Should I take them from there?

Sadly, Supermicro does not build binaries for Debian/Ubuntu but maybe you can
ask them for the sources to compile the driver by your own.



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