Date: Thu, 18 Jul 2019 21:29:55 +0200 (CEST) From: Wojciech Puchar <wojtek@puchar.net> To: freebsd-hackers@freebsd.org Subject: please help translate smartctl output to human language Message-ID: <alpine.BSF.2.20.1907182125130.39161@puchar.net>
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i am interested how much write-wear does my samsung SSD experienced relative to maximum allowed. on my 500GB samsung SSD smartctl says ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always - 0 9 Power_On_Hours 0x0032 093 093 000 Old_age Always - 31126 12 Power_Cycle_Count 0x0032 099 099 000 Old_age Always - 59 177 Wear_Leveling_Count 0x0013 095 095 000 Pre-fail Always - 88 179 Used_Rsvd_Blk_Cnt_Tot 0x0013 100 100 010 Pre-fail Always - 0 181 Program_Fail_Cnt_Total 0x0032 100 100 010 Old_age Always - 0 182 Erase_Fail_Count_Total 0x0032 100 100 010 Old_age Always - 0 183 Runtime_Bad_Block 0x0013 100 100 010 Pre-fail Always - 0 187 Uncorrectable_Error_Cnt 0x0032 100 100 000 Old_age Always - 0 190 Airflow_Temperature_Cel 0x0032 073 051 000 Old_age Always - 27 195 ECC_Error_Rate 0x001a 200 200 000 Old_age Always - 0 199 CRC_Error_Count 0x003e 100 100 000 Old_age Always - 0 235 POR_Recovery_Count 0x0012 099 099 000 Old_age Always - 28 241 Total_LBAs_Written 0x0032 099 099 000 Old_age Always - 115175140988 All seems fine but i'm not sure if i correctly understand VALUE, WORST, THRESH data for Total_LBAs_Written 50TB was written, so it's 100 times capacity. taking some write amplification in account (i use geli so no in drive compression have effect) it would be probably like 150-200. Value is 99. It was 100 when i bought it. Does it mean that in is 1% worn and can take 100 times more writes until it fails? or i am too optimistic?
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