Unable to read superblock

thanks for support how can thank..

Unable to read superblock

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Server Fault is a question and answer site for system and network administrators. It only takes a minute to sign up. A few days ago there was a power failure and UPS failure. It was not the first time unfortunately.

Also I did something that might have get the things worse. Also I am looking on backup solutions. Choose one worst disk witch has more bad smart attributes and oldest Update Time and remove it from array. If you have two bad disks you need to choose less bad disk and it must be recovered to new disk by program ddrecovery. Remove this bad disk and insert the new recovered disk to the same place.

Then you will can restore RAID 5 array with one missed disk by example sdc by command:. Read this by example. Running fsck was the right idea, but I think you ran it on the wrong device. This link will give you some tips on how to find the backup and repair when you do.

In particular, running dumpe2fs is your best bet for finding the filesystem block size. Even if the first backup is corrupted, ext4 will have created others. Well, look in the exact syslog snippet you showed us:.

Your system disk is having serious problems; get it replaced immediately. Might be well worth it replacing the cabling to it too, while you are at it. Expect data on the system disk to be corrupted to at least some degree as a result of this problem.Today's Posts. Quick Links. Search Forums.

Show Threads. Show Posts. Recovering corrupted LVM data: No readable superblocks.

EXT3-fs: unable to read superblock

Registered User. Join Date: May Hi all. Not sure where to post this, so figured I'd start here. I have a LVM2 partition that has become unreadable.

I've scoured dozens of threads about the topic and have hit a wall, so any advice is appreciated. Below is what I think shows what my major problem is: First, a simple mount attempt gives me: Code :.

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Code :. This sounds more like an experts problem, so i move it to the appropriate forum. It would have helped, though, would you have told us which system you are on.

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I suppose it is some Linux flavour, but kernel version, etc. Originally Posted by dargason. Last edited by Aia; at PM. Reason: asking for pvdisplay.

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Hi Aia, thanks a bunch for your response. Recovering DATA from sparc classic. I have a Sun sparc classic that I am trying to recover data off. The main CPU part just clicks or beeps when powered up, but does not come on nothing on screen, and LED in front not lighting up.

Red Hat. Configure LVM to gain access to the data on disks. Is there any way i can convert it to LVM? Flash drive recovering data. I have a flash drive which contained very important docs. But somebidy accidently dleted those files. I want to recover these files anyhow. I have listened the Linux have best possible chances of recovering it.

Can anybody tell me how to recover that? I would like to reduce it to create another LVM for Oracle client with meg or so. How to do it.

I'm running Not real Linux expert but here is the problem. Shutdown this machine and then it would not reboot.The above will list all the partitions on all the drives in your computer.

To recover a lost partition, your going to need Testdisk. Now, make sure your superblock is the problem, by starting a filesystem check, replacing xxx with your partition name. Here, you can change ext4 to ext3, or ext2 to suit the filesystem.

Your almost there. Now reboot, and your superblock should be fixed. I have to say thank you. Saved my day!!! No problems with my data!

Thank you very much for your help. Once I used that and the -b option in fsck it appears that everything has been fixed. Thank you, thank you! After that it was the familiar start-up process. A very big thank you for this, i was meddling with the boot loader in windows when this error creeped into ubuntu, thankfully it is fine now.

Off the top of my head, no, not really. There are so many different causes for filesystem corruption that cases can be very individual. I almost lost my subversion repo because I was lacy and had no backup. My RAID destroyed my filetables — running this fix fixed it! Maybe you should edit the page subject title Repair a broken Ext4 Superblock in Ubuntu Linux Expresso to something more suited for your content you make.

I loved the post all the same. The superblock could not be read or does not describe a correct ext4 filesystem. If the device is valid and it really contains an ext4 filesystem and not swap or ufs or something elsethen the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b Group descriptor checksum is invalud. Then I reboot, and the story starts from the beginning. It also says that the volume has the same errors and fixes them again?

Quite a few different problems give similar outputs.

unable to read superblock

My advice would be to backup the data on your raid, rebuild it, and copy back your data. Ensure also that sda1 is in ext4 though the above should pretty much work on other exts, with minor modifications. What have i to do after mke2fs found the Backup of the superblock? Maybe give that a try? You mean instead of fsck. What RAID are you using? Its an raid5 with 7disks of each 1,5tb. Probably best to go to the Ubuntu Linux forumssetup an accont and explain your situation in the Server section.

I hope you solve your problem. In future, if you want to test a drives performance, reading performance anyway, try. I stopped the use of the server.

unable to read superblock

Yes i know hdparm but dd schould be ab better test, i think i read of it anywhere. I recovered most of my data.

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I have the same problem, can you tell me how did you usee thsi to solve your ptoblem.Ubuntu Forums Code of Conduct. Page 1 of 2 1 2 Last Jump to page: Results 1 to 10 of Thread: Can't Read Superblock.

December 22nd, 1. Join Date Dec Beans 7. Can't Read Superblock Hi Lads and Lasses, I've been toying with Ubuntu on and off for a while now but still know very little about what I'm doing, I can use Google to find resolutions to most problems though. My USB thumb drive can not be mounted as the Superblock can't be read. I would use Windows to reformat the drive however, I would like to keep the data on the drive if possible.

The commands and the results are below. Commands are in bold. I gather that the first one only lists partitions? Adv Reply. December 22nd, 2. Join Date Feb Beans 5, Re: Can't Read Superblock Try checking the partitions for errors and correcting them with fsck: Code:. December 23rd, 3. Re: Can't Read Superblock Thanks for the suggestion, but it's apparently not available. December 23rd, 4. Join Date Jan Beans Like xfs, jfs, reiser 4? December 23rd, 5. December 23rd, 6. December 23rd, 7. Because the output of the commands indicates that the drive is not where it was when you were originally issuing it commands.

December 23rd, 8. It's meant to be FAT December 23rd, 9. Re: Can't Read Superblock With it potentially changing places quasi-randomly, I can't give you specific commands. If you know what the root device is that it moved to like sdd or sde instead of sdcyou can substitute that in the commands I gave you, and that will give some useful output, hopefully. January 9th, I have been on holidays. Page 1 of 2 1 2 Last Jump to page:. Bookmarks Bookmarks Digg del.Help answer threads with 0 replies.

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Click Here to receive this Complete Guide absolutely free. Recovering from a "Unable to read superblock" error. Any help would be much appreciated. All came back with the same error as above.

Proceed anyway? Use tune2fs -c or -i to override. Note the message about problems writing out the superblocks. After this I still get the error when trying to mount the filesystem. In some cases useful info is found in syslog - try dmesg tail or so Any suggestions will be greatly tried Thanks for your time. Are you sure the RAID is functioning correctly? It sounds like you've focused on the superblock error without investigating why it can't find one.

Check your RAID logs Thanks for your response If only you had logged in a bit earlier! I rebooted my system today and the sameproblem had recurred - I had previously decided to move on with my life, reformatted the array and restored what I could from backups lets just say that I've obvously cleared out a lot of dead wood - I now have heaps of free space on the array.

So did mdadm --auto-detect and after that the --detail worked and the array would mount. I hope that this is the problem though I had assembled the drive previously but perhaps by that stage it was too late and I might have already corrupted the filesystem Either way it's up again now thanks for your hint.Privacy Terms. Quick links. I have installed a hard disk SATA, 7. Now when I boot the new T server, it displays the following error messages: Creating root device.

Mounting root filesystem. I am running CentOs v5. If I put the hard disk back into T, it boots fine. I do not know why it is not working with T server. Please help!!! Are you sure the RAID is functioning properly and is not degraded?

Another possibility is that the hardware is different enough that the initrd needs to be updated. Can you boot the T from installation media in rescue mode and mount the installed system?

I've just had to deal with the exact same issue. Took one disk out of a server, popped it into another server and had the same error message.

In my case the md devices flip-flopped. On the old server md0 was swap and md1 was root, on the new one it was the other way around. It drives you mad when things like this happen for apparantly no apparent reason so I did what I always do: I started digging around. I found the culprit a few hours later: openSUSE Accordingly, openSUSE modified the superblock upon assembly on both partitions, adding "linux:0" to sda1 which belonged to md1 and "linux:1" to sda2 which belonged to md0.

Once CentOS found that information it assembled the devices according to the new superblock enumeration and voila - total chaos ensued.

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In the end I had to clone the server again and it's now back to normal. It drove me crazy though. Because if you break any hard disk on T and reboot the server, it was booting fine. The answer is Yes. This is most likely the case. I have even installed the most recent kernel but it did not help. But no luck. Finally, I decided to do a fresh install on Cent Os on T server. Board index All times are UTC.Make sure you include the unit and box numbers (if assigned).

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unable to read superblock

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