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T i m T i m is offline
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Default d-i-y Nas. Hard drive makes?

On 20 Aug 2019 13:28:14 GMT, Bob Eager wrote:

On Tue, 20 Aug 2019 11:35:25 +0100, T i m wrote:

Some are up top over 50,000 hours (the Red ones).


Any idea what the MTBF is on those drives Bob?


They quote (statistical estimate) 1,000,000 hours! My experience wouls
say that's not totally improbable, given the nimber of failures I've had
over time, although I think I've only ever kept one for about 60,000
hours.


Good to hear.

That is pretty well permanently powered on in my case, low number
of spinups, and kept fairly cool (either the microservers which are well
cooled, or big Corsair cases).


I do think that helps quite a bit.

snip

Sounds like you have most eventualities covered Bob (depending the
height above sea level of all locations and their hardness against an
EMP). ;-)


We are well above the level of the building designated as the flood
relief centre. The storage unit is a lot higher!


Handy.

Can't do much about the
EMP; if it covers here and North Americ as well, I doubt I'll care!


Quite, few of us will. ;-(

snip

I have a BDRW in a couple of machines and I wondered if the media was
any less reliable long term than say DVDR's? 50GB is quite a bit more
than even 9GB.


I wondered that about DVD vs. CD, and they seem pretty well the same. The
only CD failures I had were very cheap media (early days) and soem
problems with discs for about 2 years 2004-2006. I have check read back
to my oldest discs with no trouble in most cases, barring those which had
systematic problems.


Have you ever experienced optical media mould or the edges of the
(read / write) media itself being eaten away (I have), even on a ROM.

It's clear (I keep logs of software updates) that
one version of the writer software was glitching at the same point every
time; I suspect a buffer underrun. I managed to recover it all one way
and another as the glitch was in a metadata area. For the last two years,
everything gets ECCs added.


Sound like it's worth doing (that way).

And they ought to survive EMP too!


Not sure the status of one's photo collection would be the first thing
on our minds under those circumstances but ... ;-)

Cheers, T i m