Stephen C Woods wrote:
As he leans on his cane, the old codger says
Well Disks used to come in open cannisters, that is you took the bottom
cover off, and then put the whould pack into the drive, and then
unscrewed the top cover and took it out.. Clearly ventilated. C 1975.
Later we
Mark Hahn wrote:
In contrast, ever since these holes appeared, drive failures became
the
norm.
wow, great conspiracy theory!
I think you misunderstand. I just meant plain old-fashioned
mis-engineering.
I should have added a smilie. but I find it dubious that the whole
industry would
Al Boldi [EMAIL PROTECTED] wrote:
Interesting link. They seem to point out that smart not necessarily warns of
pending failure. This is probably worse than not having smart at all, as it
gives you the illusion of safety.
If SMART gives you the illusion of safety, you didn't understand
Mario 'BitKoenig' Holbe wrote:
Al Boldi [EMAIL PROTECTED] wrote:
Interesting link. They seem to point out that smart not necessarily
warns of pending failure. This is probably worse than not having smart
at all, as it gives you the illusion of safety.
If SMART gives you the illusion of
Mark Hahn wrote:
In contrast, ever since these holes appeared, drive failures became the
norm.
wow, great conspiracy theory!
I think you misunderstand. I just meant plain old-fashioned mis-engineering.
maybe the hole is plugged at
the factory with a substance which evaporates at
In contrast, ever since these holes appeared, drive failures became the
norm.
wow, great conspiracy theory!
I think you misunderstand. I just meant plain old-fashioned mis-engineering.
I should have added a smilie. but I find it dubious that the whole
industry would have made a major
Mark Hahn wrote:
this - I checked the seagate 7200.10: 10k feet operating, 40k max.
amusingly -200 feet is the min either way...
Which means you could not use this drive on the shores of the Dead Sea,
which is at about -1300ft.
Regards,
Richard
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Mark Hahn wrote:
- disks are very complicated, so their failure rates are a
combination of conditional failure rates of many components.
to take a fully reductionist approach would require knowing
how each of ~1k parts responds to age, wear, temp, handling, etc.
and none of those can be assumed to be independent. those are the
real reasons, but most can't be measured directly outside a lab
and the number of combinatorial interactions is huge.
It seems to me that the biggest problem are the 7.2k+ rpm platters
themselves,
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Mark Hahn wrote:
| if a discrete resistor has a 1e9 hour MTBF, 1k of them are 1e6
That's not actually true. As a (contrived) example, consider two cases.
Case 1: failures occur at constant rate from hours 0 through 2e9.
Case 2: failures occur at
| if a discrete resistor has a 1e9 hour MTBF, 1k of them are 1e6
That's not actually true. As a (contrived) example, consider two cases.
if you know nothing else, it's the best you can do. it's also a
conservative estimate (where conservative means to expect a failure sooner).
In contrast, ever since these holes appeared, drive failures became the norm.
wow, great conspiracy theory! maybe the hole is plugged at
the factory with a substance which evaporates at 1/warranty-period ;)
seriously, isn't it easy to imagine a bladder-like arrangement that
permits
Stephen C Woods wrote:
So drives do need to be ventilated, not so much wory about exploding,
but rather subtle distortion of the case as the atmospheric preasure
changed.
I have a '94 Caviar without any apparent holes; and as a bonus, the drive
still works.
In contrast, ever since these
On 20 Feb 2007, Al Boldi outgrape:
Eyal Lebedinsky wrote:
Disks are sealed, and a dessicant is present in each to keep humidity
down. If you ever open a disk drive (e.g. for the magnets, or the mirror
quality platters, or for fun) then you can see the dessicant sachet.
Actually, they aren't
On 22 Feb 2007, [EMAIL PROTECTED] uttered the following:
On 20 Feb 2007, Al Boldi outgrape:
Eyal Lebedinsky wrote:
Disks are sealed, and a dessicant is present in each to keep humidity
down. If you ever open a disk drive (e.g. for the magnets, or the mirror
quality platters, or for fun) then
As he leans on his cane, the old codger says
Well Disks used to come in open cannisters, that is you took the bottom
cover off, and then put the whould pack into the drive, and then
unscrewed the top cover and took it out.. Clearly ventilated. C 1975.
Later we got sealed drives,
Eyal Lebedinsky wrote:
Disks are sealed, and a dessicant is present in each to keep humidity
down. If you ever open a disk drive (e.g. for the magnets, or the mirror
quality platters, or for fun) then you can see the dessicant sachet.
Actually, they aren't sealed 100%.
On wd's at least,
Richard Scobie wrote:
Thought this paper may be of interest. A study done by Google on over
100,000 drives they have/had in service.
http://labs.google.com/papers/disk_failures.pdf
Interesting link. They seem to point out that smart not necessarily warns of
pending failure. This is
Disks are sealed, and a dessicant is present in each to keep humidity down.
If you ever open a disk drive (e.g. for the magnets, or the mirror quality
platters, or for fun) then you can see the dessicant sachet.
cheers
Al Boldi wrote:
Richard Scobie wrote:
Thought this paper may be of
Richard Scobie wrote:
Thought this paper may be of interest. A study done by Google on over
100,000 drives they have/had in service.
http://labs.google.com/papers/disk_failures.pdf
Bastards:
Failure rates are known to be highly correlated with drive
models, manufacturers and vintages [18].
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