Questions tagged [superblock]
The superblock tag has no usage guidance.
26
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EXT4 filesystem Superblock invalid after lvextend and power failure
There was a LVM with VG on two partition-based PVs
My bad, everything following was happening on a mounted filesystem.
I've successfully added third PV
pvcreate /dev/sdc2
Successfully extended the VG
...
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1
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0
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88
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RAID 1 to RAID 5 failure
I need your valuable help on this:
I have a NAS which is capable of having a RAID with four disks. I used it for a long time with only two, sda and sdd on RAID 1 - they are WD30EFRX. Now, I bought two ...
- 11
1
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1
answer
343
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Drive changed mapping during e2fsck process
I'm unsure if "mapping" is the right term.
Short:
I ran the following command:
$ sudo e2fsck -b 32768 /dev/sde1
e2fsck 1.46.3 (27-Jul-2021)
/dev/sde1 was not cleanly unmounted, check forced.
...
- 11
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3k
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How to get all Jenkins job details for last 7 days and send that data over mail
I am new on Jenkins and I wants powershell script to get the details of all jobs of Jenkins for last 15 days. I will send that details of Jenkin's jobs over mail to my Manager. I will be very thankful ...
- 23
2
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0
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547
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Bad Superblock when mounting LVM SSD
I made a complete copy of my Fedora boot ssd using dd however the new drive does not boot correctly and is not mountable when connected via usb enclosure on a different machine. I get a bad superblock ...
2
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2
answers
12k
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Recovering from "failure reading sector"
When I boot up my laptop (with only opensuse installed, no other OS on it), I'm greeted with error: failure reading sector 0x802 from 'hd0'. and get put into GRUB rescue prompt.
I used the original ...
- 1,419
1
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2
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785
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Can't read superblock on RAID 10 LUKS array after rsync freeze (Ubuntu Server 18.04.3 with Budgie desktop)
During an rsync from an external LUKS raid 10 array (connected by e-sata) to an internal drive, the OS froze.
After rebooting, I can no longer access the external raid 10. When I click on it I get ...
- 21
1
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377
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Can I force-mount a raid filesystem beyond repair?
I had a 3-disk RAID5 setup. While migrating carelessly, a disk popped out of the array and then another followed closely.
I therefore cannot legitimately rebuild the array because there is no aligned ...
- 261
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0
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2k
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What does mean Read-only file system while setting up superblock?
I had created usb boot but it does being cause of read only file system.
Well I tried many ways to do but can not format or write new table so when I tried command :
mkfs /dev/sdd1
mke2fs 1.44.1 (...
- 163
2
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0
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4k
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Bad magic number in super-block / Invalid argument while trying to open /dev/sda12
How can i recover my corrupted hardisk partition ?
I can tried to recover this partition using GParted but GParted see an error message
GParted 0.25.0 --enable-libparted-dmraid --enable-online-...
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2
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634
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Ubuntu RAID 10 - unable to assemble
Here's a brief history of how I got here:
4x disk Ubuntu 12.04 software RAID10 with 5x partitions (md0 - md4)
1x disk died
mdadm --fail > mdadm --remove > physically removed drive and replace
mdadm --...
0
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1
answer
57
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External drive seems to work but doesn't respond to Linux tools for repair
I have an external Seagate drive that I'm trying to get to mount by restoring the superblock. The system can see that the disk exists and read the label, but most tools that I run on disk stop ...
- 133
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1k
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ext4 superblock backup locations are different from what is documented
When I format an ext4 filesystem the mkfs says:
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000
My sparse_super flag is ON, ...
- 145
1
vote
1
answer
853
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ext4 superblock checksum?
I'm reading the ext4 superblock, but its s_checksum (offset 0x3FC) is always zero. Also the s_checksum_type (offset 0x175) field is zero as well, however according to https://ext4.wiki.kernel.org/...
- 145
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302
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Traversing through the inode to find the contents of the file stored in different data blocks
I am reading about the EXT2 filesystem and I got an understanding about it. Every file system comprises of data and metadata (inode). The file system is divided into a number of blocks with 4 main ...
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1
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5k
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Bad superblock on /dev/md0
I have an mdadm RAID 5 array running on Debian Wheezy. It's comprised of 3x 2TB drives.
I've obviously done something stupid, because now I can't mount it and it's throwing up the following error:
...
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12
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2
answers
35k
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FAT filesystem - bad superblock
Last night my android phone said it can't read the SD card and it wanted to format it. I pulled it out, put it in a card reader and tried to mount it on my desktop pc:
$ sudo mount /dev/sdb1 tmp
[...
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0
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1
answer
2k
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Reassemble Raid 0 without superblocks?
I had Ubuntu 10.04 running. I created a software raid 0 with 3 drives.
Today I upgraded to Ubuntu 12.04 (actually a fresh install) and now I am facing a huge problem:
I cant reassemble the raid, ...
- 93
1
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1
answer
447
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HDD is preventing ubuntu from installing
I have recently attempted to install ubuntu on my laptop, replacing windows 7.
The HDD was working fine with windows 7.
On my first attempt to install ubuntu it kept giving me an error that was ...
- 421
2
votes
1
answer
5k
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Degraded RAID5 and no md superblock on one of remaining drive
This is actually on a QNAP TS-509 NAS. The RAID is basically a Linux RAID.
The NAS was configured with RAID 5 with 5 drives (/md0 with /dev/sd[abcde]3). At some point, /dev/sde failed and drive was ...
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3
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3
answers
3k
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mdadm Ubuntu 12.04 fails to assemble RAID6 during boot
I will try to keep this short.
I have a mdadm RAID 6 with 11 drives. This has for years "just worked" across reinstalls and such, without any issues. I have not even had the need for configuring ...
- 41
1
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2
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567
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Will mdadm --zero-superblock render my Windows drive unbootable?
I have Windows 7 installed on a drive that used to be part of a RAID-1 array. Apparently the drive still contains the old RAID metadata, as when I boot into Ubuntu (which is installed elsewhere), the ...
- 1,165
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1
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1k
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What's the difference between a superblock and an uberblock?
I'm trying to understand how the different types of blocks work for Unix / Linux file systems.
Where can I find what the difference between a superblock and an uberblock means?
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1
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3k
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How do I check for bad superblocks and fix them on a USB device in Ubuntu 10.04
I've found some instructions for this, but it seems the fsck options are outdated. Currently I am trying:
mke2fs -n /dev/sdc4
then using the blocks listed in this:
fsck -y -b 163840 /dev/sdc4 ...
- 853
7
votes
5
answers
23k
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SD card failure, can't read superblock
What is wrong with my SD card and is it salvageable? At very least to get the current data off.
Information: I have an 8 GB Transcend Class 6 SDHC card that I got for my camera recently. It was ...
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2
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3k
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Issue when viewing the super block in ext3 file system
I tried to view the superblock by command "dd" in ext3 file system.
dd if=/dev/sda3 bs=4096 skip=1 count=1 of=superblock
But the result in superblock file is not correct(I compare the value of ...
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