S.M.A.R.T. before sequential read - TestFlow: Try #2 of Sequential write - Random read/write without O_DIRECT

smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.0-135-generic] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Number:                       HS-SSD-WAVE Pro(P) 256G
Serial Number:                      30094733152
Firmware Version:                   SN10514
PCI Vendor/Subsystem ID:            0x1e4b
IEEE OUI Identifier:                0x000000
Total NVM Capacity:                 256,060,514,304 [256 GB]
Unallocated NVM Capacity:           0
Controller ID:                      0
Number of Namespaces:               1
Namespace 1 Size/Capacity:          256,060,514,304 [256 GB]
Namespace 1 Formatted LBA Size:     512
Namespace 1 IEEE EUI-64:            000000 0000000001
Local Time is:                      Sat Sep 23 23:58:58 2023 JST
Firmware Updates (0x1a):            5 Slots, no Reset required
Optional Admin Commands (0x0017):   Security Format Frmw_DL Self_Test
Optional NVM Commands (0x001f):     Comp Wr_Unc DS_Mngmt Wr_Zero Sav/Sel_Feat
Maximum Data Transfer Size:         128 Pages
Warning  Comp. Temp. Threshold:     90 Celsius
Critical Comp. Temp. Threshold:     95 Celsius

Supported Power States
St Op     Max   Active     Idle   RL RT WL WT  Ent_Lat  Ex_Lat
 0 +     6.50W       -        -    0  0  0  0        0       0
 1 +     5.80W       -        -    1  1  1  1        0       0
 2 +     3.60W       -        -    2  2  2  2        0       0
 3 -   0.0500W       -        -    3  3  3  3     5000   10000
 4 -   0.0025W       -        -    4  4  4  4     8000   45000

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)
Critical Warning:                   0x00
Temperature:                        44 Celsius
Available Spare:                    100%
Available Spare Threshold:          1%
Percentage Used:                    1%
Data Units Read:                    14,942,040 [7.65 TB]
Data Units Written:                 17,589,481 [9.00 TB]
Host Read Commands:                 336,010,494
Host Write Commands:                17,492,734
Controller Busy Time:               1,424
Power Cycles:                       10
Power On Hours:                     75
Unsafe Shutdowns:                   2
Media and Data Integrity Errors:    0
Error Information Log Entries:      10
Warning  Comp. Temperature Time:    0
Critical Comp. Temperature Time:    0
Temperature Sensor 1:               44 Celsius
Temperature Sensor 2:               52 Celsius

Error Information (NVMe Log 0x01, max 64 entries)
Num   ErrCount  SQId   CmdId  Status  PELoc          LBA  NSID    VS
  0         10     0  0x0003  0x2002  0x000            0     0     -