SSD dying?

[svinhufvud@sopuli.xyz]

This is a second time now in the last couple of months that my openSUSE Tumbleweed server has become inaccessible over the night with the terminal printing over and over:

BTRFS error (device dm-0 state EA): bdev /dev/mapper/cr_root errs: wr 549, rd 45080, flush 8, corrupt 0, gen 0
systemd-journald[404389]: Failed to send WATCHDOG=1 notification message: Transport endpoint is not connected
BTRFS error (device dm-0 state EA): bdev /dev/mapper/cr_root errs: wr 549, rd 45081, flush 8, corrupt 0, gen 0
BTRFS error (device dm-0 state EA): bdev /dev/mapper/cr_root errs: wr 549, rd 45102, flush 8, corrupt 0, gen 0
systemd-journald[404389]: Failed to send WATCHDOG=1 notification message: Transport endpoint is not connected
BTRFS error (device dm-0 state EA): bdev /dev/mapper/cr_root errs: wr 549, rd 45103, flush 8, corrupt 0, gen 0
BTRFS error (device dm-0 state EA): bdev /dev/mapper/cr_root errs: wr 549, rd 45106, flush 8, corrupt 0, gen 0
...
systemd-journald[404389]: Failed to send WATCHDOG=1 notification message: Transport endpoint is not connected
...
BTRFS error (device dm-0 state EA): bdev /dev/mapper/cr_root errs: wr 549, rd 45128, flush 8, corrupt 0, gen 0
BTRFS error (device dm-0 state EA): bdev /dev/mapper/cr_root errs: wr 549, rd 45138, flush 8, corrupt 0, gen 0

Both times a restart seemingly fixed everything, as in the computer booted up normally and my services started up and seemed to work just fine.

I ran

btrfs scrub status /

UUID:             redacted
Scrub started:    Tue Sep  1 09:26:40 2026
Status:           finished
Duration:         0:02:36
Total to scrub:   495.58GiB
Rate:             2.96GiB/s
Error summary:    no errors found

and

smartctl -a /dev/nvme0

smartctl 7.5 2025-04-30 r5714 [x86_64-linux-7.2.2-1-default] (SUSE RPM)
Copyright (C) 2002-25, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Number:                       Samsung SSD 990 PRO 4TB
Serial Number:                      redacted
Firmware Version:                   4B2QJXD7
PCI Vendor/Subsystem ID:            redacted
IEEE OUI Identifier:                redacted
Total NVM Capacity:                 4,000,787,030,016 [4.00 TB]
Unallocated NVM Capacity:           0
Controller ID:                      1
NVMe Version:                       2.0
Number of Namespaces:               1
Namespace 1 Size/Capacity:          4,000,787,030,016 [4.00 TB]
Namespace 1 Utilization:            733,311,033,344 [733 GB]
Namespace 1 Formatted LBA Size:     512
Namespace 1 IEEE EUI-64:            redacted
Local Time is:                      Tue Sep  1 10:01:48 2026 EEST
Firmware Updates (0x16):            3 Slots, no Reset required
Optional Admin Commands (0x0017):   Security Format Frmw_DL Self_Test
Optional NVM Commands (0x0055):     Comp DS_Mngmt Sav/Sel_Feat Timestmp
Log Page Attributes (0x2f):         S/H_per_NS Cmd_Eff_Lg Ext_Get_Lg Telmtry_Lg Log0_FISE_MI
Maximum Data Transfer Size:         512 Pages
Warning  Comp. Temp. Threshold:     82 Celsius
Critical Comp. Temp. Threshold:     85 Celsius

Supported Power States
St Op     Max   Active     Idle   RL RT WL WT  Ent_Lat  Ex_Lat
 0 +     9.39W       -        -    0  0  0  0        0       0
 1 +     9.39W       -        -    1  1  1  1        0       0
 2 +     9.39W       -        -    2  2  2  2        0       0
 3 -   0.0400W       -        -    3  3  3  3     4200    2700
 4 -   0.0050W       -        -    4  4  4  4      500   21800

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: PASSED

SMART/Health Information (NVMe Log 0x02, NSID 0xffffffff)
Critical Warning:                   0x00
Temperature:                        45 Celsius
Available Spare:                    100%
Available Spare Threshold:          10%
Percentage Used:                    2%
Data Units Read:                    36,634,591 [18.7 TB]
Data Units Written:                 88,390,637 [45.2 TB]
Host Read Commands:                 173,217,468
Host Write Commands:                2,664,966,303
Controller Busy Time:               19,920
Power Cycles:                       30
Power On Hours:                     9,824
Unsafe Shutdowns:                   15
Media and Data Integrity Errors:    0
Error Information Log Entries:      0
Warning  Comp. Temperature Time:    0
Critical Comp. Temperature Time:    0
Temperature Sensor 1:               45 Celsius
Temperature Sensor 2:               47 Celsius

Error Information (NVMe Log 0x01, 16 of 64 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   Extended          Completed without error                9824            -     -   -   -    -
 1   Short             Completed without error                9824            -     -   -   -    -

which dont seem to show any errors. The SSD writes are quite high though. The SSD in question is under two years old, and acts both as a boot drive and a data drive for my data.

So is my SSD cooked? What troubleshooting steps should I take? Or is this a warranty case? (The data is backed up alredy.)

Thanks in advance!