* RE: Slow I/O with megaraid and u160 scsi jbod
@ 2005-08-29 19:03 Ju, Seokmann
2005-08-29 19:37 ` Phil Dier
2005-08-29 21:47 ` Slow I/O with FUSION MPT (not megaraid) " Phil Dier
0 siblings, 2 replies; 3+ messages in thread
From: Ju, Seokmann @ 2005-08-29 19:03 UTC (permalink / raw)
To: 'Phil Dier', linux-kernel; +Cc: Scott Holdren, ziggy, Jack Massari
Hi,
> formatted the disks in question with a single JFS partition and they
> still exhibit this behaviour when used by themselves. I have verified
> that this behaviour is not present up until at least 2.6.12.3. Let me
> know what info I can collect that would be helpful.. Thanks.
Can you please specify following?
- driver version on 2.6.12.3
- F/W version on the controller you are using.
Thank you.
> -----Original Message-----
> From: Phil Dier [mailto:phil@icglink.com]
> Sent: Monday, August 29, 2005 2:14 PM
> To: linux-kernel@vger.kernel.org
> Cc: Scott Holdren; ziggy; Jack Massari
> Subject: Slow I/O with megaraid and u160 scsi jbod
>
> Hi,
>
> I've had luck with this patch[1] (it at least eliminated the oopses
> I was getting), but now I'm having a different sort of problem with
> my setup[2] (the 2.6.13 release exhibits this behaviour as well). I
> have 2 u160 scsi jbods connected to this machine[3]. One is connected
> to an Adaptec card, and the other is connected to the Fusion MPT card
> (megaraid). All of the disks connected to the Adaptec card work fine,
> but when doing I/O on disks 2 and 3 on the megaraid card, it stalls
> considerably. When trying to sync a RAID1 device using the 4 148GB
> disks, the sync speed never goes above 2KB/s. When they finally get
> synched, IO stalls constantly. Watching with iostat confirms
> this. I've
> formatted the disks in question with a single JFS partition and they
> still exhibit this behaviour when used by themselves. I have verified
> that this behaviour is not present up until at least 2.6.12.3. Let me
> know what info I can collect that would be helpful.. Thanks.
>
>
>
> [1] http://www.ussg.iu.edu/hypermail/linux/kernel/0508.1/1952.html
> [2] http://www.icglink.com/debug-2.6.13-rc6.html
> [3] Diagram:
>
> +---------+
> | Adaptec |
> +---------+
> |
> +-------+-------+-------+-------+-------+
> | id: 0 | id: 1 | id: 2 | id: 3 | id: 4 |
> | 73GB | 73GB | 148GB | 148GB | 73GB |
> +-------+-------+-------+-------+-------+
>
> +----------+
> | megaraid |
> +----------+
> |
> +-------+-------+-------+-------+-------+
> | id: 0 | id: 1 | id: 2 | id: 3 | id: 4 |
> | 73GB | 73GB | 148GB | 148GB | 73GB |
> +-------+-------+-------+-------+-------+
>
> --
>
> Phil Dier (ICGLink.com -- 615 370-1530 x733)
>
> /* vim:set noai nocindent ts=8 sw=8: */
> -
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Slow I/O with megaraid and u160 scsi jbod
2005-08-29 19:03 Slow I/O with megaraid and u160 scsi jbod Ju, Seokmann
@ 2005-08-29 19:37 ` Phil Dier
2005-08-29 21:47 ` Slow I/O with FUSION MPT (not megaraid) " Phil Dier
1 sibling, 0 replies; 3+ messages in thread
From: Phil Dier @ 2005-08-29 19:37 UTC (permalink / raw)
To: linux-kernel; +Cc: scott, ziggy, jack
On Mon, 29 Aug 2005 15:03:43 -0400
"Ju, Seokmann" <sju@lsil.com> wrote:
> Hi,
>
> > formatted the disks in question with a single JFS partition and they
> > still exhibit this behaviour when used by themselves. I have verified
> > that this behaviour is not present up until at least 2.6.12.3. Let me
> > know what info I can collect that would be helpful.. Thanks.
> Can you please specify following?
> - driver version on 2.6.12.3
>From Documentation/scsi/ChangeLog.megaraid:
Release Date : Thu Feb 03 12:27:22 EST 2005 - Seokmann Ju <sju@lsil.com>
Current Version : 2.20.4.5 (scsi module), 2.20.2.5 (cmm module)
Older Version : 2.20.4.4 (scsi module), 2.20.2.4 (cmm module)
> - F/W version on the controller you are using.
>
scsi2 : ioc0: LSI53C1030, FwRev=01013d00h, Ports=1, MaxQ=255, IRQ=24
^^^^^^^^^^^^^^^
Is this it? If not, how do you find it?
--
Phil Dier (ICGLink.com -- 615 370-1530 x733)
/* vim:set noai nocindent ts=8 sw=8: */
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Slow I/O with FUSION MPT (not megaraid) and u160 scsi jbod
2005-08-29 19:03 Slow I/O with megaraid and u160 scsi jbod Ju, Seokmann
2005-08-29 19:37 ` Phil Dier
@ 2005-08-29 21:47 ` Phil Dier
1 sibling, 0 replies; 3+ messages in thread
From: Phil Dier @ 2005-08-29 21:47 UTC (permalink / raw)
To: linux-kernel
I made a mistake in my original post; I'm not using a megaraid, but a
Fusion MPT scsi device. Sorry if this confused anyone...
--
Phil Dier (ICGLink.com -- 615 370-1530 x733)
/* vim:set noai nocindent ts=8 sw=8: */
^ permalink raw reply [flat|nested] 3+ messages in thread
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2005-08-29 19:03 Slow I/O with megaraid and u160 scsi jbod Ju, Seokmann
2005-08-29 19:37 ` Phil Dier
2005-08-29 21:47 ` Slow I/O with FUSION MPT (not megaraid) " Phil Dier
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