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Re: [UNSURE] Re: Software raid 5 with XFS causing strange lockup problem

To: Ian Williamson <notian@xxxxxxxxx>
Subject: Re: [UNSURE] Re: Software raid 5 with XFS causing strange lockup problems
From: Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>
Date: Wed, 11 Oct 2006 13:19:24 -0400 (EDT)
Cc: Eric Sandeen <sandeen@xxxxxxxxxxx>, xfs@xxxxxxxxxxx
In-reply-to: <acd894d40610110921j61bcf5cdn57887c386f54f6c8@xxxxxxxxxxxxxx>
References: <acd894d40610102307n7fd07108u67d1b1015eeeb594@xxxxxxxxxxxxxx> <452CF770.5050902@xxxxxxxxxxx> <acd894d40610110921j61bcf5cdn57887c386f54f6c8@xxxxxxxxxxxxxx>
Sender: xfs-bounce@xxxxxxxxxxx
Also, quick question-- What type of speed do you get with 4 drives 
connected to 1 card vs. I have 8 drives connected to 3-4 cards.

What speed write/read?

Justin.

On Wed, 11 Oct 2006, Ian Williamson wrote:

> Eric,
> That's all I have for the event in /var/log/messages..
> 
> For the raid configuration I have the following:
> ian@ionlinux:~$ sudo mdadm --detail /dev/md0
> Password:
> /dev/md0:
>        Version : 00.90.03
>  Creation Time : Wed Sep 13 22:04:11 2006
>     Raid Level : raid5
>     Array Size : 732587712 (698.65 GiB 750.17 GB)
>   Device Size : 244195904 (232.88 GiB 250.06 GB)
>  Raid Devices : 4
>  Total Devices : 4
> Preferred Minor : 0
>    Persistence : Superblock is persistent
> 
>    Update Time : Mon Oct  9 00:02:30 2006
>          State : clean
> Active Devices : 4
> Working Devices : 4
> Failed Devices : 0
>  Spare Devices : 0
> 
>         Layout : left-symmetric
>     Chunk Size : 64K
> 
>           UUID : 86770f56:8e4f51e5:fd754630:f1c65359
>         Events : 0.54082
> 
>    Number   Major   Minor   RaidDevice State
>       0       8        1        0      active sync   /dev/sda1
>       1       8       17        1      active sync   /dev/sdb1
>       2       8       33        2      active sync   /dev/sdc1
>       3       8       49        3      active sync   /dev/sdd1
> 
> I really have no idea what could be causing this. Sometimes after
> restart it still won't work through Samba, and I can never perform
> massive local reads and writes, i.e. a recursive copy off of the raid.
> 
> On 10/11/06, Eric Sandeen <sandeen@xxxxxxxxxxx> wrote:
> > Ian Williamson wrote:
> > > I am running XFS on a software raid 5. I am doing this with a PCI
> > > controller with 4 SATA drives attached to it.
> > >
> > > When I play my music over the network through Samba from the raid
> > > volume my audio client will often loose the connection. This isn't
> > > remediated until I restart the machine with the raid controller or
> > > wait for an unknown amount of time. Either way, the problem still
> > > persists.
> > >
> > > Initially I though that this was Samba's fault, but I think it may be
> > > xfs related due to what was in /var/log/messages:
> > >
> > > Oct  9 22:37:33 ionlinux kernel: [105657.982701] Modules linked in:
> > > serio_raw i2c_nforce2 pcspkr forcedeth r8169 nvidia_agp agpgart
> > > i2c_core psmouse sg evdev xfs dm_mod sd_mod generic sata_nv ide_disk
> > > ehci_hcd ide_cd cdrom sata_sil ohci_hcd usbcore libata scsi_mod
> > > ide_generic processor
> > > Oct  9 22:37:33 ionlinux kernel: [105657.982985] EIP:
> > > 0060:[<f8a1353e>]    Not tainted VLI
> > > Oct  9 22:37:33 ionlinux kernel: [105657.982986] EFLAGS: 00010246
> > > (2.6.18 #1)
> >
> > It looks like you've edited this a bit too much, what came before this in
> > the logs?
> >
> > Are you running on 4k stacks, out of curiosity?
> >
> > -Eric
> >
> 
> 
> -- 
> Ian Williamson
> 
> 


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