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Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,2)

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Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,2)

southgx
This post was updated on .
Dear all:

Forgiving my interruption please. I really have a difficult problem.

The following is the details of my problem.
Can anybody help kindly?
Your advise is highly appreciated.

++++++++++++++++++++++++++++++++++++++++++++++++
Type of Gumstix:        GS3703A R3576
Version of kernel:       2.6.39

The Gumstix boots from Micro-SD. Sometimes, the Gumstix starts successfully.
 Sometimes the Gumstix fails to start. And in this case,  the following error message is displayed.
In addition, in both case the setting is exactlly same.

-----------------------------------------
.......................................
twl_rtc twl_rtc: setting system clock to 2000-01-01 00:00:10 UTC (946684810)
Waiting for root device /dev/mmcblk0p2...
mmc0: host does not support reading read-only switch. assuming write-enable.
mmc0: new high speed SDHC card at address b368
mmcblk0: mmc0:b368 USD   7.46 GiB
mmcblk0: detected capacity change from 0 to 8018460672
 mmcblk0: unknown partition table
usb 2-2: new high speed USB device number 2 using ehci-omap
VFS: Cannot open root device "mmcblk0p2" or unknown-block(179,2)
Please append a correct "root=" boot option; here are the available partitions:
1f00          524288 mtdblock0  (driver?)
b300         7830528 mmcblk0
 driver: mmcblk
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,2)
--------------------------------------------------------





======            ======                  ======            ======

Mail: lizhao@lp-d.co.jp    HP: http://www.lp-d.co.jp
======            ======                  ======            ======
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Re: help please

nickw1881
I just had this problem, I used a new SD card and it worked.

On Tue, Jul 17, 2012 at 5:26 PM, LP/李 <[hidden email]> wrote:
Dear all:
 
Forgiving my interruption please. I really have a difficult problem.
 
The following is the details of my problem.
Can anybody help kindly?
Your advise is highly appreciated.
 
++++++++++++++++++++++++++++++++++++++++++++++++
Type of Gumstix:        GS3703A R3576
Version of kernel:       2.6.39
 
The Gumstix boots from Micro-SD. Sometimes, the Gumstix starts successfully.
 Sometimes the Gumstix fails to start. And in this case,  the following error message is displayed.
In addition, in both case the setting is exactlly same.
 
-----------------------------------------
.......................................
twl_rtc twl_rtc: setting system clock to 2000-01-01 00:00:10 UTC (946684810)
Waiting for root device /dev/mmcblk0p2...
mmc0: host does not support reading read-only switch. assuming write-enable.
mmc0: new high speed SDHC card at address b368
mmcblk0: mmc0:b368 USD   7.46 GiB
mmcblk0: detected capacity change from 0 to <a href="tel:8018460672" value="+18018460672" target="_blank">8018460672
 mmcblk0: unknown partition table
usb 2-2: new high speed USB device number 2 using ehci-omap
VFS: Cannot open root device "mmcblk0p2" or unknown-block(179,2)
Please append a correct "root=" boot option; here are the available partitions:
1f00          524288 mtdblock0  (driver?)
b300         7830528 mmcblk0
 driver: mmcblk
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,2)
--------------------------------------------------------
 
 
 
 
 
======            ======                  ======            ======
Mail: [hidden email]    HP: http://www.lp-d.co.jp
======            ======                  ======            ======

------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
gumstix-users mailing list
[hidden email]
https://lists.sourceforge.net/lists/listinfo/gumstix-users



------------------------------------------------------------------------------
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Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
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Re: help please

adam.yh.lee
I get this kernel panic - not syncing problem here and there too. I think it's mostly related to corrupted file system resulting from segfault or other kernel panic.
Rewriting the file system to the same SD card fixes the problem for me.

On Tue, Jul 17, 2012 at 7:23 PM, Nick Wernicke <[hidden email]> wrote:
I just had this problem, I used a new SD card and it worked.

On Tue, Jul 17, 2012 at 5:26 PM, LP/李 <[hidden email]> wrote:
Dear all:
 
Forgiving my interruption please. I really have a difficult problem.
 
The following is the details of my problem.
Can anybody help kindly?
Your advise is highly appreciated.
 
++++++++++++++++++++++++++++++++++++++++++++++++
Type of Gumstix:        GS3703A R3576
Version of kernel:       2.6.39
 
The Gumstix boots from Micro-SD. Sometimes, the Gumstix starts successfully.
 Sometimes the Gumstix fails to start. And in this case,  the following error message is displayed.
In addition, in both case the setting is exactlly same.
 
-----------------------------------------
.......................................
twl_rtc twl_rtc: setting system clock to 2000-01-01 00:00:10 UTC (946684810)
Waiting for root device /dev/mmcblk0p2...
mmc0: host does not support reading read-only switch. assuming write-enable.
mmc0: new high speed SDHC card at address b368
mmcblk0: mmc0:b368 USD   7.46 GiB
mmcblk0: detected capacity change from 0 to <a href="tel:8018460672" value="+18018460672" target="_blank">8018460672
 mmcblk0: unknown partition table
usb 2-2: new high speed USB device number 2 using ehci-omap
VFS: Cannot open root device "mmcblk0p2" or unknown-block(179,2)
Please append a correct "root=" boot option; here are the available partitions:
1f00          524288 mtdblock0  (driver?)
b300         7830528 mmcblk0
 driver: mmcblk
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,2)
--------------------------------------------------------
 
 
 
 
 
======            ======                  ======            ======
Mail: [hidden email]    HP: http://www.lp-d.co.jp
======            ======                  ======            ======

------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
gumstix-users mailing list
[hidden email]
https://lists.sourceforge.net/lists/listinfo/gumstix-users



------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
gumstix-users mailing list
[hidden email]
https://lists.sourceforge.net/lists/listinfo/gumstix-users



------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
gumstix-users mailing list
[hidden email]
https://lists.sourceforge.net/lists/listinfo/gumstix-users
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Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,2)

southgx
In reply to this post by nickw1881
Thank you, Nick Wernicke  and Adam Lee.

According to your kindly advise, the reason is that there are some problems
on the MicroSD card.

And now, I use another MicroSD card. At the beginning,  it works pretty well.
I have installed some applications to the Gumstix. Then I use
   "sudo dd if=/dev/sd? bs=?M | gzip -c > file.img.gz  "
to backup the Card to My PC. I only backup it and did not modify the SD card.

Unfortunately,  after the backup, the kernel panic problems happen again.
The problem is exactly same with the problem shown in my letter on July 18.

Please help me.
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