After upgrading from 12.04 to 12.10, my EC2 Ubuntu instance won't boot. here is the system log:
Fri Oct 26 17:05:57 UTC 2012: shutting down for reboot [up 18892807s].
* Stopping web server apache2
... waiting
[74G[ OK ]
* Stopping DenyHosts denyhosts
[80G
[74G[ OK ]
Stopping DomainKeys Filter: dk-filter.
Stopping OpenDKIM: opendkim.
ossec-monitord not running ..
ossec-logcollector not running ..
ossec-syscheckd not running ..
ossec-analysisd not running ..
ossec-maild not running ..
ossec-execd not running ..
OSSEC HIDS v2.6 Stopped
* Stopping Postfix Mail Transport Agent postfix
[80G
[74G[ OK ]
* Asking all remaining processes to terminate...
[80G
[74G[ OK ]
* Killing all remaining processes...
[80G
[74G[
[31mfail
[39;49m]
Rather than invoking init scripts through /etc/init.d, use the service(8)
utility, e.g. service S35networking stop
initctl: Unknown job: S35networking
Since the script you are attempting to invoke has been converted to an
Upstart job, you may also use the stop(8) utility, e.g. stop S35networking
* Deactivating swap...
[80G
[74G[ OK ]
* Unmounting local filesystems...
[80G umount2: Device or resource busy
Xen Minimal OS!
start_info: 0x1110000(VA)
nr_pages: 0xf0000
shared_inf: 0xbf214000(MA)
pt_base: 0x1113000(VA)
nr_pt_frames: 0xd
mfn_list: 0x990000(VA)
mod_start: 0x0(VA)
mod_len: 0
flags: 0x0
cmd_line: root=/dev/sda1 ro 4
stack: 0x94f860-0x96f860
MM: Init
_text: 0x0(VA)
_etext: 0x6000d(VA)
_erodata: 0x78000(VA)
_edata: 0x80b00(VA)
stack start: 0x94f860(VA)
_end: 0x98fe68(VA)
start_pfn: 1123
max_pfn: f0000
Mapping memory range 0x1400000 - 0xf0000000
setting 0x0-0x78000 readonly
skipped 0x1000
MM: Initialise page allocator for 189c000(189c000)-f0000000(f0000000)
MM: done
Demand map pfns at f0001000-20f0001000.
Heap resides at 20f0002000-40f0002000.
Initialising timer interface
Initialising console ... done.
gnttab_table mapped at 0xf0001000.
Initialising scheduler
Thread "Idle": pointer: 0x20f0002010, stack: 0x2050000
Initialising xenbus
Thread "xenstore": pointer: 0x20f00027c0, stack: 0x2060000
Dummy main: start_info=0x96f960
Thread "main": pointer: 0x20f0002f70, stack: 0x2070000
"main" "root=/dev/sda1" "ro" "4"
vbd 2049 is hd0
******************* BLKFRONT for device/vbd/2049 **********
backend at /local/domain/0/backend/vbd/445/2049
Failed to read /local/domain/0/backend/vbd/445/2049/feature-barrier.
Failed to read /local/domain/0/backend/vbd/445/2049/feature-flush-cache.
16777216 sectors of 512 bytes
**************************
vbd 2064 is hd1
******************* BLKFRONT for device/vbd/2064 **********
backend at /local/domain/0/backend/vbd/445/2064
Failed to read /local/domain/0/backend/vbd/445/2064/feature-barrier.
Failed to read /local/domain/0/backend/vbd/445/2064/feature-flush-cache.
838791168 sectors of 512 bytes
**************************
vbd 2128 is hd2
******************* BLKFRONT for device/vbd/2128 **********
backend at /local/domain/0/backend/vbd/445/2128
Failed to read /local/domain/0/backend/vbd/445/2128/feature-barrier.
Failed to read /local/domain/0/backend/vbd/445/2128/feature-flush-cache.
104857600 sectors of 512 bytes
**************************
[H
[J
GNU GRUB version 0.97 (3932160K lower / 0K upper memory)
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completions. Anywhere else TAB lists the possible
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grubdom>
Where should I start trying to figure out what is wrong and fix this?
