Thread out.
Kind regards
Paul Wilkins
On Thu, 22 Aug 2019 at 14:12, Matthew Moyle-Croft wrote:
> I preface this by saying - “I recommend that all my competitors spend
> their engineering time and effort on solving for this problem”.
>
> > 3 - If we figure a drive is good for 1M restarts, then
I preface this by saying - “I recommend that all my competitors spend their
engineering time and effort on solving for this problem”.
> 3 - If we figure a drive is good for 1M restarts, then you'd expect
> precession to cause 0.2% of disks to fail over a 5 year lifespan
So, let’s look at the Ba
1 - The (approx) work done by precession over 5 years = 1800 power cycles
(see above)
2 - So this reduces the work you'll get out of a drive by 1800 power cycles
3 - If we figure a drive is good for 1M restarts, then you'd expect
precession to cause 0.2% of disks to fail over a 5 year lifespan
4 -
On 22 Aug 2019, at 10:39 am, Paul Wilkins > > wrote:
> >
> > Over a disk's 5 year life, that's about 1800 power cycles. Not
> > enough to kill a disk, or to even be an obvious problem, but a
> > hidden and unnecessary drain on disk life and IT budgets.
Except that the precession happens very gra
ddite atmosphere of stifling creative thought in this country now permeated
> into the Technosphere…?
>
>
>
>
>
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>
> From: AusNOG <mailto:ausnog-boun...@lists.ausnog.net>> On Behalf Of James Hodgkinson
> Sent: Wednesday, 21 August 2019 6:36 PM
&g
rest of us mere mortals. I’m sure that I’m not
>>> the only one that found Paul’s theorising quite interesting…or has the
>>> inherent Luddite atmosphere of stifling creative thought in this country
>>> now permeated into the Technosphere…?
>>>
>>>
>>>
>>>
>>
theorising quite interesting…or has the
>>> inherent Luddite atmosphere of stifling creative thought in this country
>>> now permeated into the Technosphere…?
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> *From:* AusNOG *
ng…or has the
>>> inherent Luddite atmosphere of stifling creative thought in this country
>>> now permeated into the Technosphere…?
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> *From:* AusNOG *On Behalf Of *James
>>&g
or has the
>> inherent Luddite atmosphere of stifling creative thought in this country
>> now permeated into the Technosphere…?
>>
>>
>>
>>
>>
>>
>>
>> *From:* AusNOG *On Behalf Of *James
>> Hodgkinson
>> *Sent:* Wednesday, 21
permeated into the Technosphere…?
>
>
>
>
>
>
>
> *From:* AusNOG *On Behalf Of *James
> Hodgkinson
> *Sent:* Wednesday, 21 August 2019 6:36 PM
> *To:* ausnog@lists.ausnog.net
> *Subject:* Re: [AusNOG] [AUSNOG] Disk wear & Foucault Period
>
>
>
> Please stop t
inherent
Luddite atmosphere of stifling creative thought in this country now permeated
into the Technosphere…?
From: AusNOG On Behalf Of James Hodgkinson
Sent: Wednesday, 21 August 2019 6:36 PM
To: ausnog@lists.ausnog.net
Subject: Re: [AusNOG] [AUSNOG] Disk wear & Foucault Period
Please
Please stop thinking out loud, this is the quiet carriage.
James
On Wed, 21 Aug 2019, at 17:17, Paul Wilkins wrote:
> Another thought, which is that horizontal mounting is optimal for polar
> regions, whereas you minimise precession at equitorial latitudes with
> vertical mounting (but only if
Another thought, which is that horizontal mounting is optimal for polar
regions, whereas you minimise precession at equitorial latitudes with
vertical mounting (but only if the axis is north aligned), which could go
some way to explaining the anecdotal stuff you hear about horizontal versus
vertica
How is this related to network operation? AusNOG - Australian Network
Operators Group.
You wouldn't go to a car show to ask about motorbikes - you'd to to a
motorbike show, because that's where the most people interested in and
having the most knowledge about motorbikes would be.
On Wed, 21 Aug 2
Paul, I would be most interested if you hear back from them.
I am curious if even BackBlaze have considered your idea in the past..
maybe a wake up for them and others
FYI, they produce these reports each quarter - worth calendaring to pick up.
I was stunned at the 14TB Toshiba reliability... int
Roy,
Those are the most comprehensive disk stats I've ever seen.
So out of curiosity, I emailed Backblaze to ask if they'd noticed any
latitudinal effect on disk wear. Not realistically expecting a response,
but if they did notice a correlation, it may perhaps emerge by osmosis.
Karl, I have to t
On Tue, 2019-08-20 at 16:06 +1000, Paul Wilkins wrote:
> Has anyone ever noticed a pattern of disks in equatorial latitudes
> lasting significantly longer than say Sydney or Melbourne?
I doubt it has anything to do with the Foucault Period, but it could
have a lot to do with the fact that folk in
Interesting observation,
Makes me wonder where BackBlaze DC(s) are
https://www.backblaze.com/blog/backblaze-hard-drive-stats-q1-2019/
Kindly,
ROY ADAMS* | *P 07 3040 5010 | Web: http://www.racs.com.au/ | Wiki:
https://ex.racs.com.au:444/ | eMail: mailto:r...@racs.com.au
Please never upgrade t
Has anyone ever noticed a pattern of disks in equatorial latitudes lasting
significantly longer than say Sydney or Melbourne? I notice the Foucault
Period for Brisbane is 52hrs vs Melbourne's 39hrs and can't but wonder if
this doesn't mean Brisbane based DCs will have their disks last 30% longer,
o
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