Re: Need help with "reallocated sector count"?

Previously Franc Zabkar <fzabkar@xxxxxxxxxxxxxxxxx> wrote:
On 13 Nov 2007 00:57:43 GMT, Arno Wagner <me@xxxxxxxxxxx> put finger
to keyboard and composed:

Previously Franc Zabkar <fzabkar@xxxxxxxxxxxxxxxxx> wrote:

OK, I see the reason for my confusion. In your case the actual raw
value of 98 sectors (=62 hex) coincides with the "percentage" value or
"normalized" value of 98. Pure coincidence.

That looks very likely to me too now. Quite confusing, I agree.

98 bad sectors is a high number. If it does not increase, the
drive may still be fine (there are those that discard a drive
at the first reallocated secotr, I prefer RAID1 and backups).

Arno

I've been living with a dying drive for at least two years.

Gutsy! ;-)

This last week was the last straw, though.

I find that Seagate's threshold value of 36 is somewhat optimistic. If
I have correctly interpreted my logs, then each percentage (?) point
corresponds to a loss of approximately 40 sectors. So a value of 36
represents a loss of 64 points, which in turn corresponds to about
2560 reallocated sectors.

Well possible. I once had a Maxtor (in a cluster of compute servers)
that was incredible slow and has about 1100 reallocated sectors.
This thing was dying pretty fast (had been dropped and it
took some weeks to develop problems). The thing was that the
SMART status still read good, i.e. above the threshold.
At that time I started monitoring the raw reallocated sector
count and installed email notification on changes of that..

Some vendors are extremely optimisticc with regard to SMART
thresholds. Kind of makes the SMART status alone pretty
worthless. No wonder so many people are asking in this group
for help interpreting SMART data.

Arno
.

Relevant Pages

  • Re: Need help with "reallocated sector count"?
    ... Or this disk does not give you a raw reallocation count. ... This may be two sectors or 200, ... it gets more reallocated sectors over time, ... allow 64 reallocated secors before a bad SMART status is reached. ...
    (comp.sys.ibm.pc.hardware.storage)
  • Re: Need help with "reallocated sector count"?
    ... ID Attribute Description Threshold Value Worst ... reallocated sectors: 98 (but how ... Pure coincidence. ... at the first reallocated secotr, ...
    (comp.sys.ibm.pc.hardware.storage)
  • Re: HDD suddenly failed, please help - Update
    ... vendor specific bytes, which typically are divided into an 8 bit ... sectors, even using your novel interpretation of the 05 value. ... pending isnt the same as bad. ... but he has some number of reallocated sectors too ...
    (comp.sys.ibm.pc.hardware.storage)
  • Re: Need help with "reallocated sector count"?
    ... Pure coincidence. ... 98 bad sectors is a high number. ... that was incredible slow and has about 1100 reallocated sectors. ... i.e. above the threshold. ...
    (comp.sys.ibm.pc.hardware.storage)
  • Re: Need help with "reallocated sector count"?
    ... a threat of data loss? ... That means there are 98 reallocated sectors, ... pity none of them recognized your original report for what ...
    (comp.sys.ibm.pc.hardware.storage)
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