On Thu, Oct 18, 2018 at 11:52 AM Paul Robert Marino <[log in to unmask]> wrote: > > Radha, > Over the decades of my dealing with hundreds of thousands of disks in data centers my experience comes down to this. > 1) if smart says its going to die trust it its rarely wrong about failures. > 2) if smart says its fine, but you are getting IO errors use the badblocks and or fdisk to verify. %60 of the time it will be a file system problem, %39 of the time it will be something wrong smart didn't detect, the rest will be something else like in no particular order a bad kernel version, bad bios revision, bad controller, or bad cable. by the way this happened to me this year on one of my personal laptops with a toshiba drive smart said it was fine but badblocks revealed it had bad sectors and more were going bad by the day. Thank you all for the insights. I am glad that the disk hasn't gone bad. > > Lastly any one who would like to discuss how the raid controllers for HP server, Dell servers, work and relates subjects like SMI-S feel free to contact me off the list, butI wont engage any further with a flame war based on the uninformed opinions of people on an open list. frankly I can back up what I say with published proven facts by reputable experts, but many people do not respond well when presented with real facts based on evidence. > > > On Wed, Oct 17, 2018 at 8:11 PM Konstantin Olchanski <[log in to unmask]> wrote: >> >> On Wed, Oct 17, 2018 at 11:57:34PM +0000, Hinz, David (GE Healthcare) wrote: >> > I'd like to submit an opposing viewpoint. >> > If SMART disk analysis says it's going to break, replace it. >> > Nothing is worth risking lost data. >> >> >> I second this. >> >> My only case of false positive (SMART reports complete failure while >> disk still seems to work) has been a worn out 2 TB "green" WD disk. >> By "worn out" I mean that it was (a) heavily used and (b) all it's mates >> of same vintage, age and heavy use have already failed (with i/o errors, etc). >> >> >> K.O. >> >> >> >> >> > >> > >> > On 10/17/18, 4:50 PM, "[log in to unmask] on behalf of Konstantin Olchanski" <[log in to unmask] on behalf of [log in to unmask]> wrote: >> > >> > > >> > > # smartctl -a /dev/sda >> > > ... >> > > Device Model: TOSHIBA MG03ACA100 >> > > ... >> > >> > Thank you for posting your data, here is my reading of smartctl data: >> > >> > > >> > > === START OF READ SMART DATA SECTION === >> > > SMART overall-health self-assessment test result: PASSED >> > > >> > >> > this you can ignore, I have held in my hands disks that reported "PASSED" >> > but were dead, could not read, could not write anything. Also had >> > disks that worked perfectly but reported "FAILED" here. >> > >> > >> > Next goes the meat of the data: >> > >> > > ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE >> > > 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 26 >> > >> > Your disk is brand new, only ever saw 26 power cycles. >> > >> > > 9 Power_On_Hours 0x0032 051 051 000 Old_age Always - 19725 >> > >> > Your disk is brand new, 19725 hours is 2.2 years. >> > >> > > 194 Temperature_Celsius 0x0022 100 100 000 Old_age Always - 32 (Min/Max 20/37) >> > >> > You have good cooling, temperature is 32C, as high as 40C is usually okey, above 50C means the cooling fans are dead. >> > >> > > 5 Reallocated_Sector_Ct 0x0033 100 100 050 Pre-fail Always - 0 >> > > 196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0 >> > > 198 Offline_Uncorrectable 0x0030 100 100 000 Old_age Offline - 0 >> > > 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0 >> > >> > Your disk does not report any problems reading or writing data to the magnetic media. >> > >> > Conclusion: healthy as a bull. >> > >> > -- >> > Konstantin Olchanski >> > Data Acquisition Systems: The Bytes Must Flow! >> > Email: olchansk-at-triumf-dot-ca >> > Snail mail: 4004 Wesbrook Mall, TRIUMF, Vancouver, B.C., V6T 2A3, Canada >> > >> > >> >> -- >> Konstantin Olchanski >> Data Acquisition Systems: The Bytes Must Flow! >> Email: olchansk-at-triumf-dot-ca >> Snail mail: 4004 Wesbrook Mall, TRIUMF, Vancouver, B.C., V6T 2A3, Canada