how to put 135 TB in a single case

  • Thread starter Thread starter Lynn McGuire
  • Start date Start date
how to put 135 TB in a single case:

http://blog.backblaze.com/2011/07/20/petabytes-on-a-budget-v2-0revealing-more-secrets/


Lynn
Click to expand...

Has anyone found a line item for those HD Anti_vibration Sleeves?

I'm also curious about HGST honoring their warranty consider the drives
are not used as intended.

"Availability - Intended for low duty cycle, non mission-critical
applications in PC, gaming and external storage environments, which may
vary from application to application. Note that customer environments
may vary from application to application."
 
miso said:
Has anyone found a line item for those HD Anti_vibration Sleeves?

I'm also curious about HGST honoring their warranty consider the drives
are not used as intended.
Click to expand...

They don't get any choice on that in any jurisdiction with even half a clue.
 
It isn't out the realm of possibilities that HGST has monitoring in the
drive firmware to see how it is used, but I get your point. [My cell
phone logs if I use it at less that 0 deg C or over 45 deg C, both of
which I violated more than once.] So you get a cheaper deskstar drive
than say that cost of an enterprise version, though only 3 years
warranty instead of 5.

Normally I would say after 3 years you would want a new drive anyway,
but I suspect we are coming up to a brick wall regarding drive areal
capacity. Probably this is clearer in my head than on paper, but say
they build this a few years ago when the industry seems to shoot right
past 1T drives and settled on 2T, with 3T being a premium. So they would
use 2T drives and in 3 years toss them and go to 3T drives, which would
be at the same sweet spot. But I don't think in 3 years time that 6T
drives will be the premium product and say 5T is the sweet spot. The
progression from 3T to 4T took much longer than 2T to 3T.
 
miso said:
It isn't out the realm of possibilities that HGST has monitoring in the
drive firmware to see how it is used,
Click to expand...

Even the SMART stats provide quite a bit of info on that.
but I get your point.
Click to expand...

Yeah, I can't see them get away with denying a warranty
claim in any jurisdiction with a clue using that data except
with the drop shock or thermal max ever seen data.
[My cell phone logs if I use it at less that 0 deg C or over 45 deg C,
both of which I violated more than once.]
Click to expand...

Sure, but neither would allow them to void a
warranty claim in any jurisdiction with a clue.
So you get a cheaper deskstar drive than say that cost of an enterprise
version, though only 3 years warranty instead of 5.
Click to expand...

Even that variation in the warranty period isnt universal.
Normally I would say after 3 years you would want a new drive anyway,
Click to expand...

Nope, not now so many are going for lots of drives to handle the
overflow from their PVRs that they haven't gotten around to watching yet.
but I suspect we are coming up to a brick wall regarding drive areal
capacity.
Click to expand...

I've seen that claim so often in the past that I need hard evidence for it
now.
Probably this is clearer in my head than on paper, but say they build this
a few years ago when the industry seems to shoot right past 1T drives and
settled on 2T, with 3T being a premium. So they would use 2T drives and in
3 years toss them and go to 3T drives, which would be at the same sweet
spot.
Click to expand...

I haven't tossed my 1TB drives even tho I bought
2TB drives for a while and now 3TB drives.

I basically buy the size that's got the best $/TB tho
I normally do start buying the bigger drive when its
only a little higher $/TB, not when its exactly the same.
But I don't think in 3 years time that 6T drives will be the premium
product and say 5T is the sweet spot.
Click to expand...

We'll see... The progression isnt always smooth, particularly
with some technology jumps and stuff like the Thailand floods.
The progression from 3T to 4T took much longer than 2T to 3T.
Click to expand...

Yes, but see above.
 
Currently, each platter's maximum standard capacity is
1TB--but HGST is only 800GB/platter x 5 platters = 4TB. So,
HGST could hit 5TB in that drive *if* five 1TB platters
(etc) were used in that drive.
Click to expand...


There can be minor improvements in density, and you can add more
platters. but I think the "wall" is near. While not an exact comparison,
look at the uP. When they hit the speed wall, they went for more cores.
But with disk drives, at some point you might as well add another drive
rather than keep adding platters. Less if more.
http://www.zdnet.com/blog/emergingtech/future-of-hard-drives-settled-until-2015/2898
Click to expand...

OK, they say 2015. but the new technology sounds quite dicey.
 
There can be minor improvements in density, and you can add more platters.
but I think the "wall" is near.
Click to expand...

I don't, that's been claimed too often in the past IMO.
While not an exact comparison, look at the uP.
Click to expand...

Its nothing like the same situation.
When they hit the speed wall, they went for more cores. But with disk
drives, at some point you might as well add another drive rather than keep
adding platters. Less if more.

OK, they say 2015. but the new technology sounds quite dicey.
Click to expand...

It usually does. I thought floppy drives sounded quite dicey
when they first showed up. They did in fact work fine anyway.
 
One thing that design lacks is power control. Talking to vendors
of similar arrays at LISA a few years ago, they told me they had
individual power switching for each drive.

The reason was they often got drive failures that were lockup's;
the drive would be dead, but a power cycle or 2 would restore
them to normal operation.

I see no way to do so in the BackBlaze scheme.
 
Back
Top