Date: Thu, 12 Nov 2009 13:56:16 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-stable@freebsd.org Subject: Re: SMART Message-ID: <hdh0l7$ocv$1@ger.gmane.org> In-Reply-To: <288A7D7F-C247-4493-8ED1-E67FFC3E0201@exscape.org> References: <20091112103308.GA2536@hiMolde.no> <20091112115350.GA18542@icarus.home.lan> <hdguqv$isj$1@ger.gmane.org> <288A7D7F-C247-4493-8ED1-E67FFC3E0201@exscape.org>
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Thomas Backman wrote: > On Nov 12, 2009, at 1:25 PM, Ivan Voras wrote: >> Actually, it would be good if you taught more than him :) >> >> I've always wondered how important are each of the dozen or so statistics and what indicates what... >> >> Here is for example my desktop drive: >> >> SMART Attributes Data Structure revision number: 10 >> Vendor Specific SMART Attributes with Thresholds: >> ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE >> 1 Raw_Read_Error_Rate 0x000f 087 083 006 Pre-fail Always - 45398197 >> 3 Spin_Up_Time 0x0003 096 093 000 Pre-fail Always - 0 >> 4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 64 >> 5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0 >> 7 Seek_Error_Rate 0x000f 084 060 030 Pre-fail Always - 247407473 >> 9 Power_On_Hours 0x0032 089 089 000 Old_age Always - 10155 >> 10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0 >> 12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 64 >> 187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0 >> 189 High_Fly_Writes 0x003a 100 100 000 Old_age Always - 0 >> 190 Airflow_Temperature_Cel 0x0022 058 055 045 Old_age Always - 42 (Lifetime Min/Max 37/44) >> 194 Temperature_Celsius 0x0022 042 045 000 Old_age Always - 42 (0 20 0 0) >> 195 Hardware_ECC_Recovered 0x001a 062 059 000 Old_age Always - 45398197 >> 197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 0 >> 198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 0 >> 199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 0 >> 200 Multi_Zone_Error_Rate 0x0000 100 253 000 Old_age Offline - 0 >> 202 TA_Increase_Count 0x0032 100 253 000 Old_age Always - 0 >> >> I see many values exceeding threshold but since I see it so often on other drives I don't know what the threshold is for. > None of the your values are exceeding the threshold - it works backwards. If the value is LOWER than the threshold, you might be in trouble. Good to know. > Also, judging by the raw read error rate, seek error rate and hardward ECC recovered, allow me to guess that this is a Seagate drive. :-) > (Seagate drives, perhaps among others, use these raw values way differently than others. My Hitachi 7K1000.B has 0 on those.) Yes, it's Seagate. Statistically I have the least problems with their drives. But I imagine that lack of standardization about these statistics very much limits the usability of SMART, right?
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