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#924 worksforme Add to DB: SanDisk-SD8SN8U-256G-1006 nefelim4ag


Data in attachment


#944 worksforme WD Hard Drive smartd[484]: Device: /dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 102 to 100 Veek

I have been querying my hard disk every 60s for the last few days and plotting temps using hddtemp/rrdtool. It hovers around the 40-42 C mark.

However smartd reports spikes of 100-102 C multiple times per day. I thought this was erroneous BUT when i do

smartctl -a /dev/sda a different picture emerges

194 Temperature_Celsius 0x0022 100 096 000 Old_age Always - 43

WORST shows 96 C which is unusual so I am concluding that smartd is correct after all. However how is it able to detect the spike in temp whereas hddtemp fails?

Is this value (smartd) erroneous? How is it being generated and how accurate is it? Can someone clarify if my temp is spiking to 96 C - could you guys shed some light on how all this works.

(I contacted WD but they just asked me to run some tool of theirs which is not documented very well - i have no idea if their Quick Test is destructive - so I've asked them about that - waiting for their reply)

#960 worksforme add WD My Passport 25E2 WDC WD40NMZW-11GX6S1 Gary Rubin
# smartctl -i /dev/sdb
smartctl 6.6 2016-05-31 r4324 [x86_64-linux-4.9.0-4-amd64] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke,

/dev/sdb: Unknown USB bridge [0x1058:0x25e2 (0x4004)]
Please specify device type with the -d option.

Use smartctl -h to get a usage summary
# smartctl -d sat -i /dev/sdb
smartctl 6.6 2016-05-31 r4324 [x86_64-linux-4.9.0-4-amd64] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke,

Device Model:     WDC WD40NMZW-11GX6S1
Serial Number:    WD-WX21D47E8DAD
LU WWN Device Id: 5 0014ee 6b2735659
Firmware Version: 01.01A01
User Capacity:    4,000,753,472,000 bytes [4.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5400 rpm
Form Factor:      2.5 inches
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-3 (minor revision not indicated)
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Thu Dec 28 14:52:08 2017 MST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
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