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From: "Rod Speed" <rod.speed.aaa@gmail.com>
Newsgroups: comp.os.linux.hardware,comp.sys.ibm.pc.hardware.storage,alt.comp.periphs.hdd
Subject: Re: A dying very old HDD confirmed?
Date: Thu, 24 Apr 2014 06:32:42 +1000
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Robert Nichols <SEE_SIGNATURE@localhost.localdomain.invalid> wrote
> Ant wrote

>> 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% 
>> 5583      -
>> # 2  Short offline       Completed without error       00% 
>> 5583      -
>  # 5  Short offline       Completed without error       00% 
> 5501      -
>> # 3  Extended offline    Completed: read failure       60%      5502 
>> 67691664
>> # 4  Extended offline    Completed: read failure       60%      5501 
>> 67691664
> [SNIP]

>> That was interesting to see automatic reallocation made the tests work 
>> again. I guess I should use the disk again if I see reallocation issues 
>> again?

> There's no "great hole" in my theory, Rod.  You were looking at the
> history of tests that were run _before_ the bad sector was reallocated.

Dunno, his original list, which still had the offline uncorrectable
showing, had got quite a few extended tests that had completed
without error, and your story about why the extended tests did
sometimes abort with a read error doesn’t explain why those didn’t.

> It's a bit hard to see that, as the "hours" numbers in the self-test
> log are apparently recorded as 16-bit numbers and you have to add 65536 to 
> the recent ones to get values that align with the
> Power_On_Hours in the SMART attributes table.

Still doesn’t explain the above unless I am having a massive brain fart.