Re: Problem with RAID-5 on SuSE 9.1 (cp hangs, high system load, cpu waits)

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I dont think the problem is related to the motherboard. I have a
configuration similar but on 2 SCSI cards and the problems persistes!

David

>> Oh and your motherboard is using a KT266A chipset - I personally won't
> touch > a VIA chipset since that whole PCI / Soundblaster fiasco (I still
> have
>> nightmares). AFAIK the KT266A has PCI issues which have some kind of
>> workaround in the Linux kernel, however it might be a factor in your
> situation.
>
> I was about to say the same thing. Which Southbridge do you have?
> Particular
> VIA Southbridges have serious problems with transferring files. It was a
> peculiar problem; most cases I've read about said that the problem
> occurred
> when transferring files between the onboard controller and on add-on
> controller. You might try taking all drives off the built-in controllers
> and
> see if that helps the problem.
>
>
>
> ---------- Original Message -----------
> From: "Christoph Zimmerli" <zeratul@xxxxxx>
> To: <linux-raid@xxxxxxxxxxxxxxx>
> Sent: Wed, 26 May 2004 17:39:43 +0200
> Subject: Problem with RAID-5 on SuSE 9.1 (cp hangs, high system load, cpu
> waits)
>
>> Hi there!
>>
>> I'm running SuSE 9.1 on my fileserver with 6 hds:
>> 1 40gb IBM system disk on the onboard ide0
>> 5 120gb Maxtor disks, 1 with the system disk on onboard ide0 and 4
>> on an Adaptec 1200A.
>>
>> I configured the 5 120gb disks as software RAID-5 array, using ext3
>> as fs. The system itself runs ok like that, but strange things
>> happen, when I start to copy files onto/from the RAID: - Copying
>> starts normally - Copying hangs, no more data is transferred - The
>> CPU is almost 100% in wait state - The system load increases
>> steadily - iowait is huge but the disks are idle
>>
>> If I react quick, I can kill the cp process, and everything returns
>> to normality. But if you wait too long, the process can't be killed
>> anymore. The problem is, you can't even shutdown the pc, because the
>> system seems to wait for something. I then pressed the reset button.
>> When booting, the system reports, it's recovering the journal of md0,
>>  and hangs there. I waited about 15h at max, but nothing happened.
>> When resetting again, the system came up flawlessly, and did about
>> 1.5h of RAID-resync. But when copying again, the same things would
>> happen.
>>
>> I was able to have the system running for half a week with all the
> hardware
>> inside, all disks connected, but each disk mounted as /disk1 etc.
>> with ext3. I then copied around some gb, but there was no high load
>> or so, and every cp terminated. I read in the list, that there were
>> some problems with ext3 as fs, so I changed the fs to Reiser, but
>> that didn't help.
>>
>> After these tests I think, that it has to be something with the RAID
>> itself, or the simultaneous disk access in RAID-mode.
>>
>> Any ideas about how to solve this problem would be highly appreciated!
>>
>> Have a nice day!
>> Christoph
>>
>> -----------------------------------------------
>> System Information:
>>
>> AMD AthlonXP 1800+
>> 512mb RAM
>> Shuttle AK31
>> ASUS DVD-ROM
>> 1 IBM IC35L040AVER07-0 (40gb system disk)
>> 5 Maxtor 6Y120L0 (120gb storage disks)
>> Adaptec 1200A PCI IDE Controller
>>
>> -----------------------------------------------
>> /proc/version
>>
>> Linux version 2.6.4-54.5-default (geeko@buildhost) (gcc version
>> 3.3.3 (SuSE
>> Linux)) #1 Fri May 7 21:43:10 UTC 2004
>>
>> -----------------------------------------------
>> /proc/mdstat:
>>
>> md0 : active raid5 hdh1[4] hdg1[3] hdd1[2] hdc1[1] hda1[0]
>>       480242688 blocks level 5, 128k chunk, algorithm 2 [5/5] [UUUUU]
>>
>> unused devices: <none>
>>
>> -----------------------------------------------
>> /etc/fstab
>>
>> /dev/hde3            /                    ext3       acl,user_xattr
>>       1 1 /dev/hde1            /boot                ext3       acl,
>> user_xattr        1 2 /dev/hde4            /var                 ext3
>>       acl,user_xattr        1 2 /dev/hde2            swap
>>      swap       pri=42                0 0 devpts
>> /dev/pts             devpts     mode=0620,gid=5       0 0 proc
>>           /proc                proc       defaults              0 0
>> usbfs                /proc/bus/usb        usbfs      noauto
>>       0 0 sysfs                /sys                 sysfs
>> noauto                0 0 /dev/dvd             /media/dvd
>> subfs
>> fs=cdfss,ro,procuid,nosuid,nodev,exec,iocharset=utf8 0 0
>> /dev/fd0             /media/floppy        subfs
>> fs=floppyfss,procuid,nodev,nosuid,sync 0 0
>> /dev/md0             /storage             reiserfs   acl,user_xattr
>>
>> -----------------------------------------------
>> /proc/dma
>>
>>  4: cascade
>>
>> -----------------------------------------------
>> /proc/interrupts
>>
>>            CPU0
>>   0:   11052606          XT-PIC  timer
>>   1:         10          XT-PIC  i8042
>>   2:          0          XT-PIC  cascade
>>   5:      13236          XT-PIC  ide0, ide1, eth1, VIA8233
>>   8:          2          XT-PIC  rtc
>>   9:          0          XT-PIC  acpi
>>  11:      79755          XT-PIC  eth0, uhci_hcd, uhci_hcd, uhci_hcd
>>  12:         50          XT-PIC  i8042
>>  14:      43472          XT-PIC  ide2
>>  15:       7081          XT-PIC  ide3
>> NMI:          0
>> LOC:          0
>> ERR:          1
>> MIS:          0
>>
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> ------- End of Original Message -------
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