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Date:      Wed, 28 Jul 2004 15:52:48 -0400
From:      "JJB" <Barbish3@adelphia.net>
To:        "samy lancher" <washville2003@yahoo.com>
Cc:        freebsd-questions@freebsd.org
Subject:   RE: ata1: resetting devices ... 
Message-ID:  <MIEPLLIBMLEEABPDBIEGMEPNGHAA.Barbish3@adelphia.net>
In-Reply-To: <20040728183619.77285.qmail@web51708.mail.yahoo.com>

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These messages say you have a UDMA66 hard drive on the master ribbon
connector of IDE1 controller and a UDMA33 hard drive on the master ribbon
connector of IDE2 controller and both ribbons are ATA66 ribbons.   This will
not hurt anything or cause any performance slow down.  You can get rid of
this problem by replacing the ATA66 ribbon on IDE2 with a ATA33 ribbon.


-----Original Message-----
From: samy lancher [mailto:washville2003@yahoo.com]
Sent: Wednesday, July 28, 2004 2:36 PM
To: Barbish3@adelphia.net
Cc: freebsd-questions@freebsd.org
Subject: RE: ata1: resetting devices ...

These are the messages from "dmesg"

ad0: 76345MB <MAXTOR 6L080J4> [155114/16/63] at ata0-master UDMA66
ad2: DMA limited to UDMA33, non-ATA66 cable or device
ad2: 38166MB <ST340810A> [77545/16/63] at ata1-master UDMA33
Mounting root from ufs:/dev/ad0s1a
ad2: READ command timeout tag=0 serv=0 - resetting
ata1: resetting devices .. ad2: DMA limited to UDMA33, non-ATA66
cable or device

Thanks,
Naveen.

JJB <Barbish3@adelphia.net> wrote:
These means that you have a mismatch between the devices and the
ribbon connecting them to your motherboard. Most common cause is a
UDMA66 hard drive plugged into the master connector on the ribbon
and a UDMA33 CDROM. The messages is telling you the IDE hard drive
controller is defaulting the ribbon read/write speed to the slower
speed of the CDROM.

Now this is not harmful to your hardware, but does deny your server
the ability to utilize the full speed potential of your hard drive.

This is easily fixed by moving the CDROM drive from the slave
connector on the primary IDE controller to the master commenter on
the secondary IDE controller on your motherboard.

This also can occur if you have two hard drives on the primary IDE
controller of different speeds.

-----Original Message-----
From: owner-freebsd-questions@freebsd.org
[mailto:owner-freebsd-questions@freebsd.org]On Behalf Of samy
lancher
Sent: Wednesday, July 28, 2004 12:48 PM
To: freebsd-questions@freebsd.org
Subject: ata1: resetting devices ...

Hello All,

This morning I have seen the following log message on my FreeBSD 4.7
server.

ad2: READ command timeout tag=0 serv=0 - resetting
ata1: resetting devices .. ad2: DMA limited to UDMA33, non-ATA66
cable or device

done.

I would really appreciate if someone could tell me the cause for
this message and is there something to worry about the server?.

Thanks in advance.

Thanks,
Naveen.



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