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Date:      Wed, 20 Jun 2001 09:05:42 +0300
From:      Odhiambo Washington <wash@wananchi.com>
To:        FBSD-Q <freebsd-questions@FreeBSD.org>
Subject:   Re: How to troubleshoot freezing?
Message-ID:  <20010620090542.D29279@everest.wananchi.com>
In-Reply-To: <3B2FE5CF.8ED52928@iowna.com>; from "Bill Moran" on Tue, Jun 19, 2001 at 07:52:47PM -0400
References:  <20010619164732.D680-100000@zoraida.reyes.somos.net> <3B2FE5CF.8ED52928@iowna.com>

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* Bill Moran <wmoran@iowna.com> [20010620 02:54]: writing on the subject 'R=
e: How to troubleshoot freezing?'
Bill> Francisco Reyes wrote:
Bill>=20
Bill> > Something may have gotten corrupted with the HD during all the prob=
lems.
Bill> > Now I am getting:
Bill> >=20
Bill> > ad0s1f: UDMA ICRC error reading fsbn 35802032 of 16724440-16724503
Bill> >   (ad0s1 bn 35802032; cn 7103 tn 46 sn 14) retrying
Bill> >=20
Bill> > ad0s1f: UDMA ICRC error reading fsbn 35802032 of 16724440-16724503
Bill> >   (ad0s1 bn 35802032; cn 7103 tn 46 sn 14) retrying
Bill> >=20
Bill> > ad0s1f: UDMA ICRC error reading fsbn 35802032 of 16724440-16724503
Bill> >   (ad0s1 bn 35802032; cn 7103 tn 46 sn 14) retrying
Bill> >=20
Bill> > ad0s1f: UDMA ICRC error reading fsbn 35802032 of 16724440-16724503
Bill> >   (ad0s1 bn 35802032; cn 7103 tn 46 sn 14) falling back to PIO mode
Bill>=20
Bill> This looks like something with the ata driver ... since it's dropping
Bill> out of DMA mode into PIO. Waht does "sysctl hw.atamodes" reveal? If t=
he
Bill> mode for the HDD is PIO, you may have an incorrect cable.
Bill>=20

Please allow me to join the thread with my own version of freezing ;-)
I have an Intel box, 450MHz, SMP, 128MB RAM which also gives a funny
'freeze'. I don't have a keyb and monitor onto this rack-mounted box. I
only connect to it via ssh.=20

What happens is that ocassionally (more often) it would freeze for a
minute or so. I wouldn't be able to do a thing on it but from another vty
on the machine I am using to ssh to it, I can ping it and get responses.

How do I go about diagnostics for such a "lock"? Is there an application I
can use to monitor the system and report a reason for the "lock" in some
log file? I've checked the logs but no clue.

All pointers would be highly appreciated.


MTIA

-Wash

--
Odhiambo Washington
Wananchi Online Ltd.,
wash@wananchi.com 1st Flr Loita Hse.
Tel: 254 2 313985 Loita Street.,
Fax: 254 2 313922 PO Box 10286,00100-NAIROBI,KE.

To do good things in the world, first you must know who you are and what gi=
ves=20
meaning to your life.=20
-Paula P. Brownlee=20

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