after grub loads fails to start

I was doing an online upgrade from Ubuntu 10.10 to Ubuntu 11.04 alpha 3, upgrade went fine until reboot then computer hangs during boot with an error concerning EMASK, ATA01, DEVICE FROZEN, DRDY. I have reinstalled 10.10 and works fine. Computer type AMD64, 8 gigs memory, 2 sata drives, 2 ide drives, dual boot, windows 7 64 bit, Ubuntu 10.10 64bit. Reading a number of hits on the internet and it seems that there may be a problem recognizing the sata drives in ubuntu 11.04. I could boot into recovery mode with limited functionality. Hopefully someone else will respond with a more detailed report. keep up the good work to all involved. thanks
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AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: boycek 1931 F.... pulseaudio
 /dev/snd/pcmC0D0p: boycek 1931 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'SB'/'HDA ATI SB at 0xfe024000 irq 16'
   Mixer name : 'Realtek ALC889A'
   Components : 'HDA:10ec0885,1458a102,00100101'
   Controls : 41
   Simple ctrls : 23
Card1.Amixer.info:
 Card hw:1 'HDMI'/'HDA ATI HDMI at 0xfdffc000 irq 43'
   Mixer name : 'ATI R6xx HDMI'
   Components : 'HDA:1002aa01,00aa0100,00100100'
   Controls : 4
   Simple ctrls : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
DistroRelease: Ubuntu 11.04
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=790c0261-d70c-47ab-8137-e8e57b78ca8f
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
MachineType: Gigabyte Technology Co., Ltd. GA-MA785GM-US2H
NonfreeKernelModules: fglrx
Package: linux (not installed)
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-28-generic root=UUID=04c89693-53fa-4f10-80c2-0a4588ac5cc0 ro single
ProcVersionSignature: Ubuntu 2.6.35-28.50-generic 2.6.35.11
Regression: Yes
RelatedPackageVersions:
 linux-restricted-modules-2.6.35-28-generic N/A
 linux-backports-modules-2.6.35-28-generic N/A
 linux-firmware 1.49
Reproducible: Yes
RfKill:

Tags: natty regression-release needs-upstream-testing
Uname: Linux 2.6.35-28-generic x86_64
UpgradeStatus: Upgraded to natty on 2011-03-30 (0 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 05/17/2010
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F11
dmi.board.name: GA-MA785GM-US2H
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF11:bd05/17/2010:svnGigabyteTechnologyCo.,Ltd.:pnGA-MA785GM-US2H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-MA785GM-US2H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-MA785GM-US2H
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: boycek 1726 F.... pulseaudio
 /dev/snd/pcmC0D0p: boycek 1726 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'SB'/'HDA ATI SB at 0xfe024000 irq 16'
   Mixer name : 'Realtek ALC889A'
   Components : 'HDA:10ec0885,1458a102,00100101'
   Controls : 41
   Simple ctrls : 23
Card1.Amixer.info:
 Card hw:1 'HDMI'/'HDA ATI HDMI at 0xfdffc000 irq 44'
   Mixer name : 'ATI R6xx HDMI'
   Components : 'HDA:1002aa01,00aa0100,00100100'
   Controls : 4
   Simple ctrls : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
DistroRelease: Ubuntu 11.04
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=790c0261-d70c-47ab-8137-e8e57b78ca8f
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
MachineType: Gigabyte Technology Co., Ltd. GA-MA785GM-US2H
Package: linux (not installed)
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-7-generic root=UUID=04c89693-53fa-4f10-80c2-0a4588ac5cc0 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Regression: Yes
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-7-generic N/A
 linux-backports-modules-2.6.38-7-generic N/A
 linux-firmware 1.49
Reproducible: Yes
RfKill:

Tags: natty regression-release needs-upstream-testing
Uname: Linux 2.6.38-7-generic x86_64
UpgradeStatus: Upgraded to natty on 2011-03-30 (0 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 05/17/2010
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F11
dmi.board.name: GA-MA785GM-US2H
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF11:bd05/17/2010:svnGigabyteTechnologyCo.,Ltd.:pnGA-MA785GM-US2H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-MA785GM-US2H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-MA785GM-US2H
dmi.sys.vendor: Gigabyte Technology Co., Ltd.