ata1: resetting devices ...

[JJB]

These messages say you have a UDMA66 hard drive on the master ribbon
connector of IDE1 and a UDMA33 hard drive on the master ribbon connector of
IDE2 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 at yahoo.com]
Sent: Wednesday, July 28, 2004 2:36 PM
To: Barbish3 at adelphia.net
Cc: freebsd-questions at 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 at 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 at freebsd.org
[mailto:owner-freebsd-questions at freebsd.org]On Behalf Of samy
lancher
Sent: Wednesday, July 28, 2004 12:48 PM
To: freebsd-questions at 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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