UDMA ICRC Error FreeBSD 4.9, falling back to PIO mode

[treeml]

I get a following error on boot

ad1s1a: UDMA ICRC error reading fsbn 511 of 244-255 (ad1s1 bn 511; cn 0 tn
8sn 7) retrying
ad1s1a: UDMA ICRC error reading fsbn 511 of 244-255 (ad1s1 bn 511; cn 0 tn
8sn 7) retrying
ad1s1a: UDMA ICRC error reading fsbn 511 of 244-255 (ad1s1 bn 511; cn 0 tn
8sn 7) retrying
ad1s1a: UDMA ICRC error reading fsbn 511 of 244-255 (ad1s1 bn 511; cn 0 tn
8sn 7) retrying
falling back to PIO mode


BTW, this all happened after a power failure.  At first I was prompted to go
into the single user mode, but then after second reboot that doesn't even
happen anymore.  Just the error message. I switch a IDE cable to the hard
drive, and now,  I don't even get the error message anymore.  The system
stuck at

Mounting root from ufs:/dev/ad1s1a

And it stuck there.  I can reboot by "ctr+alt+del"


I boot the system using the FreeBSD Fixit disk.  However, I can't seem to
see all the hard drive partitions in /dev.

Following is my partition setup.

Filesystem    Size   Used  Avail Capacity  Mounted on
/dev/ad1s1a   252M    46M   186M    20%    /
/dev/ad1s2e    20G   9.0M    18G     0%    /backup
/dev/ad1s2f    20G   130M    18G     1%    /data
/dev/ad1s2g    32G   8.9G    21G    30%    /hd2
/dev/ad1s1f   252M    18K   232M     0%    /tmp
/dev/ad1s1g   9.8G   1.6G   7.5G    17%    /usr
/dev/ad1s1d    47G    10G    33G    24%    /usr/home
/dev/ad1s1h    20G   190M    18G     1%    /usr/local
/dev/ad1s1e  1008M    49M   878M     5%    /var

/dev/ad0s1e /space



I only see

/dev/ad0s1
/dev/ad1s1

What happened to
/dev/ad1s1a
/dev/ad1s2f
/dev/ad0s1e


I  ran fsck

Fixit# fsck /dev/ad1s1

and it seems to be fine

Fixit# mount /dev/ad1s1  /mnt

That seems to be the root, but I still can't find /dev/ad1s2f or any other
/dev/ad1s2* partitions.

Any idea?


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