## Is it possible to repair a failed drive?
Maybe issues with NVME firmware, motherboard/BIOS or M.2 slot?
We need functional NVME (0) with our data.
## Log files about drives health:
> Failed drive shows:
> FW Rev ERRORMOD
>
```
root@rescue:~# nvme list
Node SN Model Namespace Usage Format FW Rev
---------------- -------------------- ---------------------------------------- --------- -------------------------- ---------------- --------
/dev/nvme0n1 S437NA0N515103 SAMSUNG MZQLB960HAJR-00007 1 1.07 GB / 1.07 GB 512 B + 0 B ERRORMOD
/dev/nvme1n1 S437NA0N515105 SAMSUNG MZQLB960HAJR-00007 1 581.61 GB / 960.20 GB 512 B + 0 B EDA5202Q
```
### Healthy NVME (1)
> Available Spare: 100%
```
root@rescue:~# smartctl -a /dev/nvme1
smartctl 6.6 2016-05-31 r4324 [x86_64-linux-5.10.18-mod-std] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Number: SAMSUNG MZQLB960HAJR-00007
Serial Number: S437NA0N515105
Firmware Version: EDA5202Q
PCI Vendor/Subsystem ID: 0x144d
IEEE OUI Identifier: 0x002538
Total NVM Capacity: 960,197,124,096 [960 GB]
Unallocated NVM Capacity: 0
Controller ID: 4
Number of Namespaces: 1
Namespace 1 Size/Capacity: 960,197,124,096 [960 GB]
Namespace 1 Utilization: 581,611,520,000 [581 GB]
Namespace 1 Formatted LBA Size: 512
Local Time is: Sat Dec 18 12:16:19 2021 EST
Firmware Updates (0x17): 3 Slots, Slot 1 R/O, no Reset required
Optional Admin Commands (0x000f): Security Format Frmw_DL NS_Mngmt
Optional NVM Commands (0x001f): Comp Wr_Unc DS_Mngmt Wr_Zero Sav/Sel_Feat
Maximum Data Transfer Size: 512 Pages
Warning Comp. Temp. Threshold: 87 Celsius
Critical Comp. Temp. Threshold: 88 Celsius
Namespace 1 Features (0x02): NA_Fields
Supported Power States
St Op Max Active Idle RL RT WL WT Ent_Lat Ex_Lat
0 + 10.60W - - 0 0 0 0 0 0
Supported LBA Sizes (NSID 0x1)
Id Fmt Data Metadt Rel_Perf
0 + 512 0 0
1 - 4096 0 0
=== START OF SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
SMART/Health Information (NVMe Log 0x02, NSID 0xffffffff)
Critical Warning: 0x00
Temperature: 34 Celsius
Available Spare: 100%
Available Spare Threshold: 10%
Percentage Used: 0%
Data Units Read: 146,521,243 [75.0 TB]
Data Units Written: 69,510,790 [35.5 TB]
Host Read Commands: 2,923,338,410
Host Write Commands: 1,144,693,075
Controller Busy Time: 4,503
Power Cycles: 37
Power On Hours: 13,075
Unsafe Shutdowns: 30
Media and Data Integrity Errors: 0
Error Information Log Entries: 0
Warning Comp. Temperature Time: 0
Critical Comp. Temperature Time: 0
Temperature Sensor 1: 34 Celsius
Temperature Sensor 2: 38 Celsius
Temperature Sensor 3: 42 Celsius
```
### Failed NVME (0)
> Available Spare: 0%, Percentage Used: 255%
```
root@rescue:~# smartctl -a /dev/nvme0
smartctl 6.6 2016-05-31 r4324 [x86_64-linux-5.10.18-mod-std] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Number: SAMSUNG MZQLB960HAJR-00007
Serial Number: S437NA0N515103
Firmware Version: ERRORMOD
PCI Vendor/Subsystem ID: 0x144d
IEEE OUI Identifier: 0x002538
Total NVM Capacity: 960,197,124,096 [960 GB]
Unallocated NVM Capacity: 0
Controller ID: 4
Number of Namespaces: 1
Namespace 1 Size/Capacity: 1,073,741,824 [1.07 GB]
Namespace 1 Formatted LBA Size: 512
Local Time is: Sat Dec 18 12:16:03 2021 EST
Firmware Updates (0x17): 3 Slots, Slot 1 R/O, no Reset required
Optional Admin Commands (0x000f): Security Format Frmw_DL NS_Mngmt
Optional NVM Commands (0x001f): Comp Wr_Unc DS_Mngmt Wr_Zero Sav/Sel_Feat
Maximum Data Transfer Size: 512 Pages
Warning Comp. Temp. Threshold: 87 Celsius
Critical Comp. Temp. Threshold: 88 Celsius
Namespace 1 Features (0x02): NA_Fields
Supported Power States
St Op Max Active Idle RL RT WL WT Ent_Lat Ex_Lat
0 + 10.60W - - 0 0 0 0 0 0
Supported LBA Sizes (NSID 0x1)
Id Fmt Data Metadt Rel_Perf
0 + 512 0 0
1 - 4096 0 0
=== START OF SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
SMART/Health Information (NVMe Log 0x02, NSID 0xffffffff)
Critical Warning: 0x00
Temperature: -
Available Spare: 0%
Available Spare Threshold: 10%
Percentage Used: 255%
Data Units Read: 0
Data Units Written: 0
Host Read Commands: 0
Host Write Commands: 0
Controller Busy Time: 0
Power Cycles: 0
Power On Hours: 0
Unsafe Shutdowns: 0
Media and Data Integrity Errors: 0
Error Information Log Entries: 4
Warning Comp. Temperature Time: 0
Critical Comp. Temperature Time: 0
```
```
root@rescue:~# nvme smart-log /dev/nvme0n1
Smart Log for NVME device:nvme0n1 namespace-id:ffffffff
critical_warning : 0
temperature : 4294967023 C
available_spare : 0%
available_spare_threshold : 10%
percentage_used : 255%
data_units_read : 0
data_units_written : 0
host_read_commands : 0
host_write_commands : 0
controller_busy_time : 0
power_cycles : 0
power_on_hours : 0
unsafe_shutdowns : 0
media_errors : 0
num_err_log_entries : 4
Warning Temperature Time : 0
Critical Composite Temperature Time : 0
Temperature Sensor 1 : 0 C
Temperature Sensor 2 : 0 C
Temperature Sensor 3 : 0 C
Temperature Sensor 4 : 0 C
Temperature Sensor 5 : 0 C
Temperature Sensor 6 : 0 C
Temperature Sensor 7 : 0 C
Temperature Sensor 8 : 0 C
```
### LVM errors:
```
root@rescue:~# pvs
Couldn't find device with uuid qUelxM-FXi6-HduD-m6A4-VVfa-61eF-tJ7h8A.
PV VG Fmt Attr PSize PFree
/dev/nvme1n1p1 Storage lvm2 a-- 894.25g 294.25g
unknown device Storage lvm2 a-m 592.78g 147.78g
```
```
root@rescue:~# vgchange -ay Storage
Couldn't find device with uuid qUelxM-FXi6-HduD-m6A4-VVfa-61eF-tJ7h8A.
Refusing activation of partial LV Storage/vsv4765-d0xv6p2u8yc28vqk-gp7socpfcgu1d8rd. Use '--activationmode partial' to override.
Refusing activation of partial LV Storage/vsv4770-d1uhqxmvmj6npybe-f6ootr0j5lxaw0yb. Use '--activationmode partial' to override.
Refusing activation of partial LV Storage/vsv5015-dmxm0y1ckwmdfsxd-cra9zx8ugpzm0cne. Use '--activationmode partial' to override.
Refusing activation of partial LV Storage/vsv5076-djuhho90kmc97glh-k6cjlb53zt30gnze. Use '--activationmode partial' to override.
1 logical volume(s) in volume group "Storage" now active
```
```
root@rescue:~# lvdisplay
/dev/Storage/vsv4765-d0xv6p2u8yc28vqk-gp7socpfcgu1d8rd: read failed after 0 of 4096 at 214748299264: Input/output error
/dev/Storage/vsv4765-d0xv6p2u8yc28vqk-gp7socpfcgu1d8rd: read failed after 0 of 4096 at 214748356608: Input/output error
/dev/Storage/vsv4765-d0xv6p2u8yc28vqk-gp7socpfcgu1d8rd: read failed after 0 of 4096 at 0: Input/output error
/dev/Storage/vsv4765-d0xv6p2u8yc28vqk-gp7socpfcgu1d8rd: read failed after 0 of 4096 at 4096: Input/output error
/dev/Storage/vsv5015-dmxm0y1ckwmdfsxd-cra9zx8ugpzm0cne: read failed after 0 of 4096 at 21474770944: Input/output error
/dev/Storage/vsv5015-dmxm0y1ckwmdfsxd-cra9zx8ugpzm0cne: read failed after 0 of 4096 at 21474828288: Input/output error
/dev/Storage/vsv5015-dmxm0y1ckwmdfsxd-cra9zx8ugpzm0cne: read failed after 0 of 4096 at 0: Input/output error
/dev/Storage/vsv5015-dmxm0y1ckwmdfsxd-cra9zx8ugpzm0cne: read failed after 0 of 4096 at 4096: Input/output error
/dev/Storage/vsv5076-djuhho90kmc97glh-k6cjlb53zt30gnze: read failed after 0 of 4096 at 214748299264: Input/output error
/dev/Storage/vsv5076-djuhho90kmc97glh-k6cjlb53zt30gnze: read failed after 0 of 4096 at 214748356608: Input/output error
/dev/Storage/vsv5076-djuhho90kmc97glh-k6cjlb53zt30gnze: read failed after 0 of 4096 at 0: Input/output error
/dev/Storage/vsv5076-djuhho90kmc97glh-k6cjlb53zt30gnze: read failed after 0 of 4096 at 4096: Input/output error
Couldn't find device with uuid qUelxM-FXi6-HduD-m6A4-VVfa-61eF-tJ7h8A.
```
### fdisk:
```
root@rescue:~# fdisk -l /dev/nvme0n1
Disk /dev/nvme0n1: 1 GiB, 1073741824 bytes, 2097152 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
```
```
root@rescue:~# fdisk -l /dev/nvme1n1
Disk /dev/nvme1n1: 894.3 GiB, 960197124096 bytes, 1875385008 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x08755452
Device Boot Start End Sectors Size Id Type
/dev/nvme1n1p1 2048 1875385007 1875382960 894.3G 8e Linux LVM
```
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