4.5 to 4.8, disks not mounting now -- solved

[bill mcmilleon]

Well, I eventually figured this one out myself.  For some reason, 4.8 wants 
me to omit the partition letter from the name: i.e., /dev/ad4s1 instead of 
/dev/ad4s1e.  I think this might have to do with being set up as 
"dangerously dedicated."

--Bill

Date:      Sun, 13 Jul 2003 08:17:01 -0500
From:      "bill mcmilleon" <mcmilwj at hotmail.com>
To:        freebsd-questions at freebsd.org
Subject:   4.5 to 4.8, disks not mounting now -- w/ disklabel error output
Message-ID:  <BAY7-F416378scUJeS8000086fa at hotmail.com>


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Sorry, I should have included this output as well:

fs3# disklabel -r ad4
disklabel: bad pack magic number (label is damaged, or pack is unlabeled)

--Bill McMilleon

quoting previous posting below:
-------------------------

I have a Pentium 233 that was running 4.5-RELEASE whose boot drive went
belly up last week. Fortunately, I have a "atapci1: <Promise TX2 ATA133
controller>" which provides access to my primary data drives, so merely
replacing the failed boot drive that lived on the onboard ide controller
would not result in a loss of critical data.

Unfortunately, it appears that the fresh install of 4.8-RELEASE on a new,
replacement boot drive is unable to mount the "old" drives on the Promise
controller.  Dmesg output still conveys that the controller and drive names
(ad4, ad5, ad7) are found, but disklabel reports "disklabel: bad pack magic
number (label is damaged, or pack is unlabeled)" and attempts to mount fail.
  Please see below.  I am inexperienced at migrations like this, and fear
the loss of this large amount of critical data.  See details below.  Any
help is appreciated.  Thx.  --Bill McMilleon

Selected dmesg output:

atapci0: <Intel PIIX3 ATA controller> port 0xf000-0xf00f at device 7.1 on
pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
pci0: <Intel 82371SB (PIIX3) USB controller> at 7.2 irq 10
atapci1: <Promise TX2 ATA133 controller> port
0x7400-0x740f,0x7000-0x7003,0x6c00
-0x6c07,0x6800-0x6803,0x6400-0x6407 mem 0xe0020000-0xe0023fff irq 9 at
device 13 .0 on pci0
ata2: at 0x6400 on atapci1
ata3: at 0x6c00 on atapci1
.
.
.
ad0: 8809MB <QUANTUM FIREBALLP KA9.1> [17898/16/63] at ata0-master WDMA2
ad4: 117800MB <IC35L120AVVA07-0> [239340/16/63] at ata2-master UDMA100
ad5: 171705MB <WDC WD1800BB-00DAA0> [348861/16/63] at ata2-slave UDMA100
ad7: 156334MB <Maxtor 4G160J8> [317632/16/63] at ata3-slave UDMA133
acd0: DVD-ROM <AOpen Inc. DVD-ROM DVD-1640 PRO 0122> at ata1-master PIO4
Mounting root from ufs:/dev/ad0s1a
WARNING: R/W mount of /i120g denied.  Filesystem is not clean - run fsck


Fstab (failing mounts commented out):

/dev/ad0s1b             none            swap    sw              0       0
/dev/ad0s1a             /               ufs     rw              1       1
/dev/ad0s1f             /tmp            ufs     rw              2       2
/dev/ad0s1g             /usr            ufs     rw              2       2
/dev/ad0s1e             /var            ufs     rw              2       2
/dev/acd0c              /cdrom          cd9660  ro,noauto       0       0
#/dev/ad4s1e            /disks/stash    ufs     rw              2       2
#/dev/ad5s1e            /disks/main     ufs     rw              2       2
#/dev/ad7s1e            /disks/media    ufs     rw              2       2
proc                    /proc           procfs  rw              0       0


Typical fdisk output (ad5 and ad7 are similar):

fs3# fdisk -s ad4
/dev/ad4: 15017 cyl 255 hd 63 sec
Part        Start        Size Type Flags
   1:          63   241248042 0xa5 0x80


Typical disklabel output (again, ad5 and ad7 similar):

fs3# disklabel ad4
# /dev/ad4:
type: unknown
disk: amnesiac
label: fictitious
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 15017
sectors/unit: 241254720
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # milliseconds
track-to-track seek: 0  # milliseconds
drivedata: 0

8 partitions:
#        size   offset    fstype   [fsize bsize bps/cpg]
  c: 241254720        0    unused        0     0        # (Cyl.    0 -
15017*)

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