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.
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 <olcha...@triumf.ca> 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, "owner-scientific-linux-us...@listserv.fnal.gov > on behalf of Konstantin Olchanski" < > owner-scientific-linux-us...@listserv.fnal.gov on behalf of > olcha...@triumf.ca> 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 >
