CentOS - Jun 2010 - INFO: task nash:5282 blocked for more than 120 seconds.

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I did some configuration changes on a XenServer 5.6 (Which I believe is
running CentOS 5.5 under the hood).  After a reboot, the server failed
to come back up.  Connecting to the serial console, I see that it hangs
right after setting hostname:

Setting hostname somehostname:  [  OK  ]
INFO: task nash:5282 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
INFO: task nash:5282 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.




the last two lines keep repeating.

How can I get this server to boot up?  Do I need to use a cd and go into
rescue mode?

Any help would be greatly appreciated,

Russ
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(2010/06/09 15:06), Ruslan Sivak wrote:
> INFO: task nash:5282 blocked for more than 120 seconds.
some guy faces the same problem on citrix's forum.
He find that he removes 2-sata disks, It's booting fine.

the nash(finding volumes in boot sequences) has many
limits with boot device recognition.

resolution
  back to old kernel(5.5)
  rebuilding ramdisk(mkinitrd) with latest device driver.(if you have
vendor/raid equipment)
  back to storage configurations.

changing grub/boot parameter with "noquiet" options show you debug
messages.
these message can let you change your booting conditions.

-Tsuyoshi