Monitor ssd device

Monitor Intel SATA SSD

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smartctl -a /dev/sdaa
233 Media_Wearout_Indicator 0x0032 097 097 000 Old_age Always - 0


241 Host_Writes_32MiB 0x0032 100 100 000 Old_age Always - 24439
242 Host_Reads_32MiB 0x0032 100 100 000 Old_age Always - 4275
243 NAND_Writes_32MiB 0x0032 100 100 000 Old_age Always - 40857

dd if=/dev/zero of=test bs=1M count=1024

241 Host_Writes_32MiB 0x0032 100 100 000 Old_age Always - 24471
242 Host_Reads_32MiB 0x0032 100 100 000 Old_age Always - 4275
243 NAND_Writes_32MiB 0x0032 100 100 000 Old_age Always - 40857

You can see write 32*32=1024M write to ssd. the value is “MB”.

Samsung SATA SSD

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251 NAND_Writes             -O--CK   100   100   000    -    7546253904
||||||_ K auto-keep
|||||__ C event count
||||___ R error rate
|||____ S speed/performance
||_____ O updated online
|______ P prefailure warning

NVME Intel SSD

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isdct  show -smart -intelssd 0
Description : NAND Bytes Written
ID : F4
Normalized : 100
Raw : 6142760

- F5 -

Description : Host Bytes Written
ID : F5
Normalized : 100
Raw : 2790072

dd if=/dev/zero of=test bs=1M count=1024

Description : NAND Bytes Written
ID : F4
Normalized : 100
Raw : 6142930

- F5 -

Description : Host Bytes Written
ID : F5
Normalized : 100
Raw : 2790104

Raw value of Host Bytes Written improved 32