LVM on LUSK disk is damaged any way to get data?

webcapcha · 2026-05-09 15:25:46

I have LVM on LUKS NVME disk , maybe due to force shutdown I can't mount data on it.

I'm still able to unlock LUKS with password and activate logical volumes (root, home, swap)

But I can't mount it

sudo mount /dev/mapper/HynixVolGroup-home Documents/

mount: /home/lex/Documents: can't read superblock on /dev/mapper/HynixVolGroup-home.
       dmesg(1) may have more information after failed mount system call.

When tried to moung with

mount -o ro

also no luck

If I tried to mount with no journal like

mount -o ro,noload

It actually mounted and I'm able to observe directories and files. But when try to copy them "the disk is freezing"

lsblk output

nvme0n1                  259:4    0 953.9G  0 disk  
├─nvme0n1p1              259:5    0     4G  0 part  
└─nvme0n1p2              259:6    0 949.9G  0 part  
  └─cryptlvm             252:0    0 949.9G  0 crypt 
    ├─HynixVolGroup-swap 252:1    0     8G  0 lvm   
    ├─HynixVolGroup-root 252:2    0    80G  0 lvm   
    └─HynixVolGroup-home 252:3    0 861.4G  0 lvm

I've tried to restore superblocks with no luck

webcapcha · 2026-05-09 15:35:10

If I do ddrescue may I use it like

ddrescue -d /dev/mapper/HynixVolGroup-home image.img mapfile

of should I clone only partition in my case nvme0n1p2? Because in this case I have the same 1TB spare drive and the failed partition won't fit

frostschutz · 2026-05-09 15:48:25

Are there errors in smartctl -a for this disk or read errors / filesystem errors reported in dmesg?

If the disk is faulty, then ddrescue is your only hope. Also make sure to disable fstrim.timer and all other forms of trim/discard when dealing with SSDs or loopmounting filesystem images. You don't want trim to run while the filesystem is in an undefined state.

It's fine to clone just the home LV provided LVM metadata is good; but you should backup LUKS header and LVM metadata separately, just in case those vanish too, at that point it's game over.

For recovery attempts, you can use overlays https://archive.kernel.org/oldwiki/raid … erlay_file

That way you can experiment and undo any changes without having to go back to ddrescue to make a new image.

If it's ext4 you can try your luck with debugfs too, sometimes that allows you to access files where mounting fails.

Last edited by frostschutz (2026-05-09 15:48:57)

webcapcha · 2026-05-09 15:55:24

smartctl -a says

Read NVMe Identify Controller failed: NVME_IOCTL_ADMIN_CMD: Input/output error

But with GUI I can find such smart

=== START OF INFORMATION SECTION ===
Model Number:                       SKHynix_HFS001TEJ4X112N
Serial Number:                      5YC8N044114108V01
Firmware Version:                   51030C31
PCI Vendor/Subsystem ID:            0x1c5c
IEEE OUI Identifier:                0xace42e
Controller ID:                      1
NVMe Version:                       1.4
Number of Namespaces:               1
Namespace 1 Size/Capacity:          1,024,209,543,168 [1.02 TB]
Namespace 1 Formatted LBA Size:     512
Namespace 1 IEEE EUI-64:            ace42e 003ad1d26e
Local Time is:                      Sat May  9 17:55:18 2026 EEST
Firmware Updates (0x16):            3 Slots, no Reset required
Optional Admin Commands (0x0017):   Security Format Frmw_DL Self_Test
Optional NVM Commands (0x005f):     Comp Wr_Unc DS_Mngmt Wr_Zero Sav/Sel_Feat Timestmp
Log Page Attributes (0x1e):         Cmd_Eff_Lg Ext_Get_Lg Telmtry_Lg Pers_Ev_Lg
Maximum Data Transfer Size:         64 Pages
Warning  Comp. Temp. Threshold:     86 Celsius
Critical Comp. Temp. Threshold:     87 Celsius

Supported Power States
St Op     Max   Active     Idle   RL RT WL WT  Ent_Lat  Ex_Lat
 0 +   4.5000W       -        -    0  0  0  0      100     100
 1 +   3.0000W       -        -    1  1  1  1      200     200
 2 +   0.6000W       -        -    2  2  2  2      400     400
 3 -   0.0150W       -        -    3  3  3  3     2000    2000
 4 -   0.0030W       -        -    4  4  4  4     5000   10000

Supported LBA Sizes (NSID 0x1)
Id Fmt  Data  Metadt  Rel_Perf
 0 +     512       0         0

=== START OF SMART DATA SECTION ===
SMART overall-health self-assessment test result: FAILED!
- media has been placed in read only mode

SMART/Health Information (NVMe Log 0x02, NSID 0xffffffff)
Critical Warning:                   0x08
Temperature:                        31 Celsius
Available Spare:                    100%
Available Spare Threshold:          10%
Percentage Used:                    1%
Data Units Read:                    8,053,232 [4.12 TB]
Data Units Written:                 43,646,599 [22.3 TB]
Host Read Commands:                 126,263,331
Host Write Commands:                733,458,278
Controller Busy Time:               12,077
Power Cycles:                       8,029
Power On Hours:                     8,500
Unsafe Shutdowns:                   169
Media and Data Integrity Errors:    1,839
Error Information Log Entries:      16
Warning  Comp. Temperature Time:    0
Critical Comp. Temperature Time:    0
Temperature Sensor 1:               35 Celsius
Temperature Sensor 2:               31 Celsius

Error Information (NVMe Log 0x01, 16 of 256 entries)
No Errors Logged

Self-test Log (NVMe Log 0x06, NSID 0xffffffff)
Self-test status: No self-test in progress
Num  Test_Description  Status                       Power_on_Hours  Failing_LBA  NSID Seg SCT Code
 0   Short             Completed without error                8420            -     -   -   -    -
 1   Short             Completed without error                8419            -     -   -   -    -
 2   Short             Completed without error                3668            -     -   -   -    -

Last edited by webcapcha (2026-05-09 15:57:32)

frostschutz · 2026-05-09 16:09:18

Either ddrescue (best option, if you have the space) or create overlay on that SSD directly (risky option, might work if reads are still reliable regardless) and hope that makes it mountable after fsck.

Good luck...

Arch Linux

#1 2026-05-09 15:25:46

LVM on LUSK disk is damaged any way to get data?

#2 2026-05-09 15:35:10

Re: LVM on LUSK disk is damaged any way to get data?

#3 2026-05-09 15:48:25

Re: LVM on LUSK disk is damaged any way to get data?

#4 2026-05-09 15:55:24

Re: LVM on LUSK disk is damaged any way to get data?

#5 2026-05-09 16:09:18

Re: LVM on LUSK disk is damaged any way to get data?

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