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
|
