file system error (fwd)

Munjun Kang malas at pinetron.com
Sun Dec 1 19:51:00 CET 2002


> "Ronald G. Minnich" <rminnich at lanl.gov> writes:
> 
> > any ideas?
> > 
> > ron
> > 
> > ---------- Forwarded message ----------
> > Date: Fri, 29 Nov 2002 15:35:52 +0900
> > From: Munjun Kang <malas at pinetron.com>
> > To: Ronald G. Minnich <rminnich at lanl.gov>
> > Subject: Re: file system error
> > 
> > Thanks for your reply.
> > 
> > I tried as your suggest.
> > 
> > dd if=/dev/zero of=/dev/hda bs=1024 count=10000 ~ 100000
> > Segmentation fault's are occured in random by count.
> > 
> > and then, turn off the UDMA feature by hdparm option.
> > But, I can see same symptom.
> 
> All DMA is turned off hdparm -d0 /dev/hda ??
Yes, I did it.

>  
> > In this time, I tried to attach SCSI & IEEE1394 SBP-2 devices.
> > case1. Adaptec 2930 SCSI adapter + 8GB Seagate SCSI HDD
> > case2. IEEE1394 Interface card + external IEEE1394 HDD
> > both cases show the same problem.
> 
> The northbridge having DMA problems is still a canidate.
> SCSI disks do DMA as well. 
>  
> > Now, I think it's not a DMA problem.
> > I'm in the maze. hmmmm......
> > 
> > Is there any clear hint?
> 
> Past history with the Athlon problems on VIA chipsets
> says that some VIA northbridges have problems with burst traffic.
> 
> And either DMA or a fast memory copy could trigger it.   memtest86
> currently does not have an optimized memcpy so it could miss that problem.
> 
> Currently I consider your northbridge to be the best canidate.
> The same kernel is run under both BIOSes?
I tried in several cases.
1. Build-in BIOS + 2.4.18-13 (redhat 8.0)        => work
2. Linuxbios + 2.4.18-13 (redhat 8.0)               => don't work     
3. Linuxbios + 2.4.19                                       => don't work

> 
> Compared to your previous BIOS are there any unknown settings
> in the northbridge?
> 
> In particular what are the differences between, on both boards,
> and can you account for the differences.
> lspci -s 0:0.0 -xxx
> And can you account for all differences.
In work,
00:00.0 Host bridge: VIA Technologies, Inc. VT8605 [ProSavage PM133]
00: 06 11 05 06 06 00 10 a2 00 00 00 06 00 08 00 00
10: 08 00 00[e8]00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00[06 11 05 06]
30: 00 00 00 00 a0 00 00 00 00 00 00 00 00 00 00 00
40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50: fd db c8 be 05 00 08 08 c0 00 08 08 08 08 08 08
60: 03[aa]00[20]e6 d5 d5 00 43 38 86 0d 08 21 00 00
70: c4 88[cc]0c 0e 81 52 00 01 b4 09 00 00 00 00 00
80: 0f 40 00 00 c0 00 00 00 02 00 00 00 00 00 00 00
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
a0: 02 c0 20 00 07 02 00 1f 00 00 00 00 2f 02 04 00
b0: 40 ff 10 00 00 00 00 00 00 00 00 00 00 00 00 00
c0: 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
f0: 00 00 00 00 00 00 06 00 32 42 00 b0 00 00 00 00

In problem,
00:00.0 Class 0600: 1106:0605
00: 06 11 05 06 06 00 10 a2 00 00 00 06 00 08 00 00
10: 08 00 00[f8]00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00[00 00 00 00]
30: 00 00 00 00 a0 00 00 00 00 00 00 00 00 00 00 00
40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50: fd db c8 be 05 00 08 08 c0 00 08 08 08 08 08 08
60: 03[00]00[00]e6 d5 d5 00 43 38 86 0d 08 21 00 00
70: c4 88[4c]0c 0e 81 52 00 01 b4 09 00 00 00 00 00
80: 0f 40 00 00 c0 00 00 00 02 00 00 00 00 00 00 00
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
a0: 02 c0 20 00 07 02 00 1f 00 00 00 00 2f 02 04 00
b0: 40 ff 10 00 00 00 00 00 00 00 00 00 00 00 00 00
c0: 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
f0: 00 00 00 00 00 00 06 00 32 42 00 b0 00 00 00 00

0x13 : Graphics Aperature Base
0x2c : I don't know. maybe same with vendor & device ID
0x61, 0x62 : shadow ram setting
0x72 : CPU to PCI Flow control. difference bit 7 is described as follow.
        7bit Retry Status
            0 No retry occurred -------- default
            1 Retry occurred ----------- write 1 to clear

In my opinion, there are not special differences.

> 
> Eric
> 
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