I can confirm this bug:
After upgrading to 8.04, the kernel doesn't recognize one of my hard
disks (the one with the root partition on it) any more (a seagate IDE
disk). Booting with the old (2.6.22) kernel works fine. It's not
recognized by the live CD either. The other disk (also IDE) is
displayed alright, all partitions show up correctly in /dev/disk/* as
sdd* as expected. The disk without the partition table _does_ show up
as a block device as /dev/sdc, though.
Relevant output from lshw (run under 2.6.22) follows:
*-ide:1
description: IDE Channel 1
physical id: 1
bus info: [EMAIL PROTECTED]
logical name: ide1
clock: 33MHz
*-disk:0
description: ATA Disk
product: ST3160812A
vendor: Seagate
physical id: 0
bus info: [EMAIL PROTECTED]
logical name: /dev/hdc
version: 3.AAJ
serial: 4LS440SN
size: 149GiB (160GB)
capabilities: ata dma lba iordy smart security pm
partitioned partitioned:dos
configuration: mode=udma2 signature=bbbbbbbb smart=on
*-volume:0
description: EXT3 volume
vendor: Linux
physical id: 1
bus info: [EMAIL PROTECTED],1
logical name: /dev/hdc1
logical name: /
logical name: /dev/.static/dev
version: 1.0
serial: 9bdd3a49-2483-4c2d-9b4a-6aaf1e089a73
size: 20GiB
capacity: 20GiB
capabilities: primary bootable journaled
extended_attributes large_files huge_files recover ext3 ext2 initialized
configuration: created=2008-02-06 19:02:16
filesystem=ext3 modified=2008-04-26 23:25:04 mount.fstype=ext3
mount.options=rw,data=ordered mounted=2008-04-26 23:25:04 state=mounted
*-volume:1
description: Linux swap volume
physical id: 2
bus info: [EMAIL PROTECTED],2
logical name: /dev/hdc2
version: 1
serial: 1b77acd9-bea4-47fd-b12b-c2bbb12f327d
size: 972MiB
capacity: 972MiB
capabilities: primary nofs swap initialized
configuration: filesystem=swap pagesize=4096
*-volume:2
description: EXT3 volume
vendor: Linux
physical id: 3
bus info: [EMAIL PROTECTED],3
logical name: /dev/hdc3
logical name: /home
version: 1.0
serial: bd9da549-79e8-46fb-b08a-8036ae1c11f6
size: 29GiB
capacity: 29GiB
capabilities: primary journaled extended_attributes
large_files huge_files recover ext3 ext2 initialized
configuration: created=2008-02-06 19:02:40
filesystem=ext3 modified=2008-04-26 23:26:23 mount.fstype=ext3
mount.options=rw,data=ordered mounted=2008-04-26 23:26:23 state=mounted
*-volume:3
description: Windows FAT volume
vendor: mkdosfs
physical id: 4
bus info: [EMAIL PROTECTED],4
logical name: /dev/hdc4
logical name: /data-neu
version: FAT32
serial: 47a9-fbc4
size: 98GiB
capacity: 98GiB
capabilities: primary fat initialized
configuration: FATs=2 filesystem=fat label=dataneu
mount.fstype=vfat
mount.options=rw,gid=46,fmask=0007,dmask=0007,codepage=cp437,iocharset=iso8859-1,utf8
state=mounted
*-disk:1
description: ATA Disk
product: IBM-DTLA-307030
vendor: IBM
physical id: 1
bus info: [EMAIL PROTECTED]
logical name: /dev/hdd
version: TX4OA50C
serial: YK0YKT2P876
size: 28GiB (30GB)
capacity: 28GiB (30GB)
capabilities: ata dma lba iordy smart security pm apm
partitioned partitioned:dos
configuration: apm=off mode=udma2 signature=0a6b0a6a smart=on
*-volume:0
description: Windows FAT volume
vendor: MSDOS5.0
physical id: 1
bus info: [EMAIL PROTECTED],1
logical name: /dev/hdd1
logical name: /windows
version: FAT32
serial: 688d-c6c1
size: 10001MiB
capacity: 10001MiB
capabilities: primary bootable fat initialized
configuration: FATs=2 filesystem=fat mount.fstype=vfat
mount.options=rw,gid=46,fmask=0007,dmask=0007,codepage=cp437,iocharset=iso8859-1,utf8
state=mounted
*-volume:1
description: Linux swap volume
physical id: 2
bus info: [EMAIL PROTECTED],2
logical name: /dev/hdd2
version: 1
serial: 0c94c6f1-d36f-42d4-bb79-5c4a04966d12
size: 368MiB
capacity: 368MiB
capabilities: primary nofs swap initialized
configuration: filesystem=swap pagesize=4096
*-volume:2
description: Windows FAT volume
vendor: mkdosfs
physical id: 3
bus info: [EMAIL PROTECTED],3
logical name: /dev/hdd3
logical name: /data-alt
version: FAT32
serial: 46df-3e0f
size: 18GiB
capacity: 18GiB
capabilities: primary fat initialized
configuration: FATs=2 filesystem=fat mount.fstype=vfat
mount.options=rw,gid=46,fmask=0007,dmask=0007,codepage=cp437,iocharset=iso8859-1,utf8
state=mounted
Please pass this bug over to the kernel team as critical (unable to
mount the root file system here), and possibly also upstream. (Don't
know if this is fixed in a newer kernel version maybe.)
** Attachment added: "output of lshw, the disk shown as hdc1 causes errors in
2.6.24"
http://launchpadlibrarian.net/13949523/lshw_20080426
--
unable to read IDE partition table under 8.0.4
https://bugs.launchpad.net/bugs/221677
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