Re: Insane numbers in SMART report
On Sun, Apr 15, 2007 at 02:49:16 +0300, Linas Žvirblis wrote:
> Sorry for being little off-topic, but I am really clueless on where else
> I could ask.
>
> I just installed "smartmontools" on this brand new laptop with SATA HDD,
> and the numbers I am seing are a bit scary. This is what I am talking
> about...
>
> 1 Raw_Read_Error_Rate ... 90912
> 2 Throughput_Performance ... 22348118
> 5 Reallocated_Sector_Ct ... 8589934592000
> 7 Seek_Error_Rate ... 1559
> 196 Reallocated_Event_Count ... 458686464
> 195 Hardware_ECC_Recovered ... 281
> 203 Run_Out_Cancel ... 433781670603
>
> ...full output attached.
>
> 195 and 203 are sometimes increasing, and sometimes decreasing, 5 and
> 196 seem to be stable.
>
> This just does not make any sense. Hard drive cannot be _that_ broken
> and still operational, can it? I ran the "long" and "offline" tests, and
> there does not seem to be any errors in the logs.
>
> What is going on?
[...]
> === START OF INFORMATION SECTION ===
[...]
> SMART Error Log Version: 1
> No Errors Logged
>
> SMART Self-test log structure revision number 1
> Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
> # 1 Extended offline Completed without error 00% 128 -
As far as my understanding of SMART goes: The "raw" numbers are
difficult to interpret, their meaning varies from one manufacturer to
the next one, etc. I think the "No Errors Logged" message and the fact
that you can complete an extended offline test without error means that
your drive is OK.
I guess if you really want to know which SMART parameters correlate with
drive failures in practice then you should probably read the results of
Google's extensive study
"Failure Trends in a Large Disk Drive Population"
http://labs.google.com/papers/disk_failures.pdf
I did not have time to look at that one in detail so far, but I think it
is safe to assume that Google has lots of statistics on the issue.
--
Regards, | http://users.icfo.es/Florian.Kulzer
Florian |
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