From owner-freebsd-hardware  Fri Nov 17 23:34:17 2000
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Date: Sat, 18 Nov 2000 08:29:02 +0100
From: Thierry Herbelot <herbelot@cybercable.fr>
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To: "Andrew B." <dikiyobraz@mail.ru>
Cc: freebsd-hardware@FreeBSD.ORG
Subject: Re: can't initialize HDD
References: <19589.001118@mail.ru>
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"Andrew B." wrote:
> 
>   Hi!
> 
>   Hardware: MB Acorp SiS22, HDD Caviar 22100(prim. mast.), CDROM
>   Toshiba  XM-6702B(prim. slav.)
>   OS: FreeBSD-4.1
> 
>   I have trouble with my booting up my computer. I see these messages:
> 
>   ad0: 2014MB <WDC AC22100L> [4092/16/63] at ata0-master using UDMA33
>   acd0: CDROM <TOSHIBA CDROM XM-6702B> at ata0-master using PIO4
                                            ^^^^^^^^^^^
it seems you CD drive is ALSO configured as a master on the IDE bus

>   Mounting root from ufs: /dev/ad0s1a
>   ad0: READ command timeout - reseting
> <pause 1-2 min. after each such string>
>   ata0: reseting devices ..  device dissapeared! 1 done
>   ad0: READ command timeout - reseting
>   ata0: reseting devices ..  device dissapeared! 1 done
>   ad0: READ command timeout - reseting
>   ata0: reseting devices ..  device dissapeared! 1 done
>   ata0-master: WARNING: WAIT-READY active=ATA_ACTIVE_ATA
>   ata0-master: timeout waiting for command=ef s=00 e=60
>   ad0: trying fallback to PIO mode
>   ata0: reseting devices ..  device dissapeared! 1 done
> <continue booting>
> 
>   When I remove CD-ROM from machine, OS can't boot:
> 
>   ad0: 2014MB <WDC AC22100L> [4092/16/63] at ata0-master using UDMA33
>   Mounting root from ufs: /dev/ad0s1a
>   ad0: READ command timeout - reseting

I also had this problem : this can be due to bad cables (or bad
connections between the cable and the motherboard or between the cable
and the disk drive)

>   ata0: reseting devices ..  device dissapeared! ata0-master: timeout waiting to give command=c6 s=d0 e=00
>   ata0-master: timeout waiting to give command=ef s=d0 e=00
>   ata0-master: timeout waiting to give command=ef s=d0 e=00
>   ata0-master: timeout waiting to give command=ef s=d0 e=00
>   done
>   ata0-master: timeout waiting to give command=20 s=d0 e=00
>   ad0: error exiting command
>   ad0: reading primary paritition table: error reading fsbn 0

this is not good : the sector containing the partition table can not be
read (time to buy another disk !)

>   Root mount failed: 5
>   Mounting root from ufs:wd0s1a
> <system halted>
> 
>   What's wrong?

As you see, lots of things are wrong on your machine

> 
>   Andrew Baznikin                        mailto:dikiyobraz@mail.ru
> 

-- 
Thierry Herbelot


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