Re: read errors
- From: "Squeeze" <rubberduck@xxxxxxxxxx>
- Date: Wed, 4 Jun 2008 01:32:20 +0100
Franc Zabkar wrote in news:5jjb44550gjg1bv0v3l986ts53lglhhs80@xxxxxxx
On Tue, 03 Jun 2008 17:23:30 +1000, Franc Zabkar <fzabkar@xxxxxxxxxxxxxxxxx> put finger to keyboard and composed:
The "Seek Error Rate" value is also a strange one. My testing suggests
that it reflects a seek count, not an error, and not a rate:
However, if I look at the raw *totals* I get ...
Seek Error Rate 052E0E3000ECh
Power On Hours Count 0000000026C7h
If I divide "power on hours" by the "seek error rate" (aka seek count
... then I get 6.3 microseconds per seek, which seems absurd.
Here is a spreadsheet of the last 3 month's of SMART data for my
failing 13GB Seagate hard drive:
I notice that there is an abrupt increase in the raw Seek Error Rate
value at row 25, from 0x052E0E39C161 to 0x052F0E39FD21. This
suggests that the uppermost 4 nibbles are not part of the seek count,
but instead reflect some other event or attribute. If we take only the
lower 32 bits, then we get an average of about 600msec between seeks
over the last 3 months of the drive's life, which makes much more sense.
Maybe the uppermost 16 bits represent the seek error count and the
lowermost 32 bits the total seek count ??? However, this still doesn't
explain why the "worst" normalised value for the Seek Error Rate
attribute is less than the current normalised value. Furthermore, my
13GB drive belongs to an earlier model family, so the SMART attributes
may be encoded differently to those of later models.
Perhaps you should re-read those lines from the Seagate FAQ again, no?
To get a clue?
Are you one of those people as mentioned by Jim Hatfield in that SMART annex proposal, Franc?
"There is another class of device users, however, in the open source community. These people still do not
understand the differences, and they publish assertions and software claiming to tell you information that
you ‘need to know’ about your ‘own property’ that ‘the others’ don’t want you to know"
- Franc Zabkar
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