Date: Fri, 19 Jul 2019 14:22:27 +0200 From: Domagoj =?UTF-8?Q?Smol=C4=8Di=C4=87?= <rank1seeker@gmail.com> To: freebsd-hackers@freebsd.org, Wojciech Puchar <wojtek@puchar.net> Subject: Re: please help translate smartctl output to human language Message-ID: <20190719142227.00005348@gmail.com> In-Reply-To: <alpine.BSF.2.20.1907182125130.39161@puchar.net> References: <alpine.BSF.2.20.1907182125130.39161@puchar.net>
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On Thu, 18 Jul 2019 21:29:55 +0200 (CEST) Wojciech Puchar <wojtek@puchar.net> wrote: > 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? > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to > "freebsd-hackers-unsubscribe@freebsd.org" Integers representing VALUE, WORST and THRESH columns are "normalized values". Over time, VALUE of Total_LBAs_Written will be declining. Once it reaches THRESH value it is considered 'Old_age', meaning it's prone to all kinds of malfunctions expected from old hardware. That doesn't mean you want be able to use it afterwards. Domagoj Smolčićhelp
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