Gee, so you're telling me all those "breakthroughs" over the last decade about solar panels becoming more efficient and using more of the light that this them are... bullshit? I'm shocked.
So, you've got inefficient panels, were disappointed with their output, and decided to wash them on about day 20 after being installed?
A few weeks worth of dust is nothing compared to the normal day-to-day variations.
We're talking about years of dust. Debris. Bird shit. Snow.
Funny how all MY links were on the first page, and were higher.
Also, your Sun link isn't on the first page. Also, your Sun link doesn't define JBOD. Also, your Sun link is arguing against you. The guy says he got 144 drives in 6 JBODs.
Yeah, that's 24 "1 TB" drives in 6 JBODs. Nothing in that blog post says what the Sun box is presenting the volumes (externally) as. All this is about is using their fun little GUI to tell that he cabled it wrong (on purpose, to make the blog post).
Your dciginc link also doesn't define JBOD, but it proves itself to be even more wrong than you: "JBODs use aging RAID5/6 protection schemas to maintain data integrity. Raid 5/6 is becoming more impractical as disk drive sizes grow and rebuild times to recover failed disk drives increase. Further, JBODs provide no or limited self-healing capabilities to detect errors that can occur in disk drives over time and automatically correct them."
JBOD using RAID 5/6? What?
Your aberdeeninc link is for a 4-channel SAS box. It uses the term JBOD a lot, but it never defines it. It's marketing.
Looks like you couldn't find anything at all to support your claim, yet you posted some arbitrary links to try to save face.
Being a CEO of a publicly traded company DOES mean you need to reveal to shareholders any information you have that could impact the company's value (stock price).
Apple, including Jobs himself, are VERY well aware of the impact Steve Jobs' health has upon the stock price. They've seen it happen before when he was sick, and when he was rumored to have died.
Then again, Steve Jobs shouldn't be back-dating his stock options either.
Apple shouldn't be hiding continued costs for product development and support by charging a nominal fee for software updates. (No, it has nothing to do with SARBOX, it has to do with Apple not wanting to reveal how long they plan to support product X, so they keep the support and development cost projections off the balance sheet by lying and claiming the sales of the patches cover the cost!)
I did the math for some other idiot, assuming no output on the 51st year, an average output over 50 years of 50% of what he's getting now.
He gets an APY of 1.37%. Pitiful.
Assured rise in electrical costs? What about the assured decrease in payouts for the people who sell back to the grid?
In just 5 years, there will be more in his area selling back more electricity to the grid more efficiently than his gear can handle. And he has to keep his shit running for at least another 10 years past that point just to break even.
If the company exists by then, and if the warranty is honored, you'll be stuck into the whole "to replace it under warranty we have to verify the problem, we have to remove the old panels, we have to install the new panels, and you get to pay us for the labor" bullshit.
As for your rate of depreciation, you're assuming a linear rate, ending at 50 years exactly, AND you're ignoring the fact that the panels, once installed, have very little value. You can't sell them to your neighbor. They cost tens of thousands of dollars and get you maybe a grand or two each year. They serve no other purpose.
When calculating the depreciation of something, you take into account the cost and the resale value. You don't say your car has depreciated less because it took you so many places - that's the point of the car. You don't say panels have depreciated less because you're selling power back to electric company - that's the point of the panels.
What you're calculating is something else entirely. The point of the panels is to recoup their own cost, and then make a profit.
Let's say the panels DO last 50 years, and decline linearly.
The guy saved $3000 in one year. Expand that to saving $0 in the 51st year. Average savings over 50 years = $1500 per year. Total savings over 50 years = $75000. Initial cost = $38000.
Gain after 50 years = $37000 (97.4%). Or an APY of 1.37%
This is assuming the boldest of claims from the manufacturer, no maintenance fees, and a stable rate for selling electricity back to the grid.
With the shitty economy of today, you can invest your money in much better ways. A risk-free (if the FDIC goes under, we've got bigger issues) CD will yield, in today's shitty economy, at least 1.5%, and your money is locked away only for a year. Lock it away for 2 years and you'll get 1.75% or 2.00%. Lock it away for 5 or more years and have an investment over $10,000 to work with? You could get much more.
Oh, and this is all tax-deferred.
There are also government bonds, retirement accounts (IRA, ROTH IRA, etc) which are tax deferred/exempt, and earn even more.
The bottom line is that, even assuming the best, even in this economy, this is a dumb, dumb investment. Less than 2 years ago you could get CDs at 5% or higher.
If it's blocking light, it is making a difference. If you can see the dust, it's a noticeable difference. If it's noticeable to your eye, it's definitely affecting the efficiency of the panel.
Your story would have been much better if you had suggested rain instead of a hose.
Uh. maybe you're one of the typical internet neourbanites, but a lot of people live in areas where dust (actual dust, as well as sand, dirt, debris from plants, etc) is a problem.
That (obviously) requires the host adapter to have port multiplier capability.
I wouldn't trust the onboard sata controllers of most mobos to support that (regardless of what they say on the box). If I had to move the drives to a different system, I might be stuck unable to access my shit.
That, with a compliant sata controller card, would do well to replace the (more esoteric and expensive) SAS card and cable. Plus it's more "put it all in a box"-friendly.
What? If you have enough files and move between systems frequently enough that this is an issue, consider a USB flash drive.
Store your files there. Keep backups on each machine.
Want versioning? Seems to me that files typically have a datestamp for when they were last modified. That's all the versioning people need 99.9% of the time.
If you're in a situation where this is a big problem (many users many files many machines), you want your damned files stored in a more permanent location, such as on, I don't know, a file server?
Save your fucking files to the server. If you're away from the server, upload your file when you get back. When you get to another machine, grab the files you intend to work on.
Hell, Windows has supported this shit for ages with offline files and the whole "Briefcase" bullshit.
And yes, Windows does a simple versioning and backup with shadow copies.
In your case, 2 Linux servers and OS X, just sync shit on a schedule when all machines are on the network if you want. The 2 servers should always be in sync with each other (since they're servers and should always be up and networked).
The laptop is the only issue, and should sync when connecting to and before disconnecting from the network.
Any way you want to go about syncing files is fine. Might I suggest a simple GUI drag and drop to/from the server? Seems to me most users can handle that, as long as you beat into them how to know which direction to do it. You could simplify this by making a simple script users could run. This script could include making backups on the server so we don't have issues of people going the wrong way, and so you can timestamp each old version (useful for keeping files for various projects grouped together, so people can grab old versions of a project if that's what they're working on).
You don't need services to handle this for you. You have 2 servers and 1 laptop. I would say you don't need anything to handle this for you. I wouldn't even go as far as to keep a flash drive laying around. Just, you know, remember to grab files you're going to work on before leaving with your laptop, and remember to reupload those you've changed when you get back to the network.
If you've got a more complicated setup (multiple users accessing and modifying the same files at the same time) THEN you need a version control / checkout service running, and even then, none of them are intuitive, and users WILL get confused and break shit. Especially when you're dealing with mobile users who will be away from the network for unspecified periods of time.
I remember that one, lol. They never really detailed the costs involved with the caustic soda, of course, which will need to be replaced constantly and which will corrode their fucking tower from the inside out.
I think the one I'm talking about is in Solar Power Plant. I think they were testing a new design to please "The Entrepreneur" and convince him that you could be profitable.
Um, it's not about the CO2 that's there, it's about the effect of (the proposed idea of) burying solid CO2 in the sea bed.
There will be a huge, global change as that CO2 stops being solid.
Now, we all know that the envirotards fear any and all change, and will panic. Just look at global warming (sorry, global climate change):
Even if we assume humans are causing it (we aren't), and even if we assume we can stop it (we can't), why should we? BECAUSE OMG CHANGE! WE'LL BE FLOODED! ALL MANNER OF LIFE WILL BE RUINED! WE MUST SPEND BILLIONS TO FAIL TO PREVENT THE CHANGE!
God, I remember them comparing a new breakthrough solar panel and some other thing, and they floated them up into the sky on a balloon, and measured how much electricity they ere getting.
The dirty hippies were overjoyed to the point of tears to learn that the new design put out more electricity.
I think it might have had something to do with the fact that the old design had a about 60% of it's area in shadow. Shadow from a piece of cardboard on a stick, which served no other purpose than to cripple the old design.
Slashdot Mirror
Gee, so you're telling me all those "breakthroughs" over the last decade about solar panels becoming more efficient and using more of the light that this them are... bullshit? I'm shocked.
So, you've got inefficient panels, were disappointed with their output, and decided to wash them on about day 20 after being installed?
A few weeks worth of dust is nothing compared to the normal day-to-day variations.
We're talking about years of dust. Debris. Bird shit. Snow.
Funny how all MY links were on the first page, and were higher.
Also, your Sun link isn't on the first page.
Also, your Sun link doesn't define JBOD.
Also, your Sun link is arguing against you.
The guy says he got 144 drives in 6 JBODs.
http://blogs.sun.com/brendan/resource/analytics-1/analytics-1-hardware-crop.png
Yeah, that's 24 "1 TB" drives in 6 JBODs.
Nothing in that blog post says what the Sun box is presenting the volumes (externally) as. All this is about is using their fun little GUI to tell that he cabled it wrong (on purpose, to make the blog post).
Your dciginc link also doesn't define JBOD, but it proves itself to be even more wrong than you:
"JBODs use aging RAID5/6 protection schemas to maintain data integrity. Raid 5/6 is becoming more impractical as disk drive sizes grow and rebuild times to recover failed disk drives increase. Further, JBODs provide no or limited self-healing capabilities to detect errors that can occur in disk drives over time and automatically correct them."
JBOD using RAID 5/6? What?
Your aberdeeninc link is for a 4-channel SAS box.
It uses the term JBOD a lot, but it never defines it. It's marketing.
Looks like you couldn't find anything at all to support your claim, yet you posted some arbitrary links to try to save face.
Another moron who buys into the political boogy man of global warming.
You build it, I'll be your first customer.
You have all the pieces, the problem is just getting it together.
Grab a drive caddy for 4/5 drives from some PC case.
Many of these have tool-less designs.
Grab the power and LED stuff (if you want it) from smaller enclosures (or wire up your own).
Wire the power together.
Hook that board up, and secure it to the side? of the drive caddy.
All you need then is a box and jacks for power and eSata. Maybe a fan.
Being a CEO of a publicly traded company DOES mean you need to reveal to shareholders any information you have that could impact the company's value (stock price).
Apple, including Jobs himself, are VERY well aware of the impact Steve Jobs' health has upon the stock price. They've seen it happen before when he was sick, and when he was rumored to have died.
Then again, Steve Jobs shouldn't be back-dating his stock options either.
Apple shouldn't be hiding continued costs for product development and support by charging a nominal fee for software updates. (No, it has nothing to do with SARBOX, it has to do with Apple not wanting to reveal how long they plan to support product X, so they keep the support and development cost projections off the balance sheet by lying and claiming the sales of the patches cover the cost!)
I did the math for some other idiot, assuming no output on the 51st year, an average output over 50 years of 50% of what he's getting now.
He gets an APY of 1.37%. Pitiful.
Assured rise in electrical costs?
What about the assured decrease in payouts for the people who sell back to the grid?
In just 5 years, there will be more in his area selling back more electricity to the grid more efficiently than his gear can handle. And he has to keep his shit running for at least another 10 years past that point just to break even.
Then he has to shell out again for new panels?
25-50 year warranties my ass.
If the company exists by then, and if the warranty is honored, you'll be stuck into the whole "to replace it under warranty we have to verify the problem, we have to remove the old panels, we have to install the new panels, and you get to pay us for the labor" bullshit.
As for your rate of depreciation, you're assuming a linear rate, ending at 50 years exactly, AND you're ignoring the fact that the panels, once installed, have very little value. You can't sell them to your neighbor. They cost tens of thousands of dollars and get you maybe a grand or two each year. They serve no other purpose.
When calculating the depreciation of something, you take into account the cost and the resale value. You don't say your car has depreciated less because it took you so many places - that's the point of the car. You don't say panels have depreciated less because you're selling power back to electric company - that's the point of the panels.
What you're calculating is something else entirely. The point of the panels is to recoup their own cost, and then make a profit.
Let's say the panels DO last 50 years, and decline linearly.
The guy saved $3000 in one year.
Expand that to saving $0 in the 51st year.
Average savings over 50 years = $1500 per year.
Total savings over 50 years = $75000.
Initial cost = $38000.
Gain after 50 years = $37000 (97.4%).
Or an APY of 1.37%
This is assuming the boldest of claims from the manufacturer, no maintenance fees, and a stable rate for selling electricity back to the grid.
With the shitty economy of today, you can invest your money in much better ways. A risk-free (if the FDIC goes under, we've got bigger issues) CD will yield, in today's shitty economy, at least 1.5%, and your money is locked away only for a year. Lock it away for 2 years and you'll get 1.75% or 2.00%. Lock it away for 5 or more years and have an investment over $10,000 to work with? You could get much more.
Oh, and this is all tax-deferred.
There are also government bonds, retirement accounts (IRA, ROTH IRA, etc) which are tax deferred/exempt, and earn even more.
The bottom line is that, even assuming the best, even in this economy, this is a dumb, dumb investment. Less than 2 years ago you could get CDs at 5% or higher.
If it's blocking light, it is making a difference.
If you can see the dust, it's a noticeable difference.
If it's noticeable to your eye, it's definitely affecting the efficiency of the panel.
Your story would have been much better if you had suggested rain instead of a hose.
Uh. maybe you're one of the typical internet neourbanites, but a lot of people live in areas where dust (actual dust, as well as sand, dirt, debris from plants, etc) is a problem.
Seriously, you're wrong.
If you're working with people who use JBOD to refer to individual drives, that's fine. Just know that they're wrong.
You have no evidence to support your claim.
Yup. Joke's on him.
And the taxpayers who subsidized whatever government rebates/discounts/tax credits he got for "going green".
They lose efficiency over time, and will never offset his initial costs before needing to be replaced.
Oh, and don't forget maintenance (they get dusty).
That (obviously) requires the host adapter to have port multiplier capability.
I wouldn't trust the onboard sata controllers of most mobos to support that (regardless of what they say on the box). If I had to move the drives to a different system, I might be stuck unable to access my shit.
That, with a compliant sata controller card, would do well to replace the (more esoteric and expensive) SAS card and cable. Plus it's more "put it all in a box"-friendly.
And it'll work for 99.9% of people.
I really don't get the desire for people to make shit more complicated and less reliable than it needs to be.
Very rarely would anyone need anything other than a simple sync job, manual or automated.
Oh, and I'm assuming we don't trust /rely on "the cloud" or any 3rd-party online storage system.
(Because they shouldn't be trusted/relied on, and because in many cases they can't be, legally.)
What?
If you have enough files and move between systems frequently enough that this is an issue, consider a USB flash drive.
Store your files there.
Keep backups on each machine.
Want versioning? Seems to me that files typically have a datestamp for when they were last modified. That's all the versioning people need 99.9% of the time.
If you're in a situation where this is a big problem (many users many files many machines), you want your damned files stored in a more permanent location, such as on, I don't know, a file server?
Save your fucking files to the server. If you're away from the server, upload your file when you get back. When you get to another machine, grab the files you intend to work on.
Hell, Windows has supported this shit for ages with offline files and the whole "Briefcase" bullshit.
http://www.microsoft.com/windowsxp/using/mobility/learnmore/offlinefiles.mspx
http://support.microsoft.com/kb/307885
And yes, Windows does a simple versioning and backup with shadow copies.
In your case, 2 Linux servers and OS X, just sync shit on a schedule when all machines are on the network if you want. The 2 servers should always be in sync with each other (since they're servers and should always be up and networked).
The laptop is the only issue, and should sync when connecting to and before disconnecting from the network.
Any way you want to go about syncing files is fine. Might I suggest a simple GUI drag and drop to/from the server? Seems to me most users can handle that, as long as you beat into them how to know which direction to do it. You could simplify this by making a simple script users could run. This script could include making backups on the server so we don't have issues of people going the wrong way, and so you can timestamp each old version (useful for keeping files for various projects grouped together, so people can grab old versions of a project if that's what they're working on).
You don't need services to handle this for you.
You have 2 servers and 1 laptop. I would say you don't need anything to handle this for you. I wouldn't even go as far as to keep a flash drive laying around. Just, you know, remember to grab files you're going to work on before leaving with your laptop, and remember to reupload those you've changed when you get back to the network.
If you've got a more complicated setup (multiple users accessing and modifying the same files at the same time) THEN you need a version control / checkout service running, and even then, none of them are intuitive, and users WILL get confused and break shit. Especially when you're dealing with mobile users who will be away from the network for unspecified periods of time.
Uh...
CO2 isn't a fundamental unit of matter, you know.
We can change that shit into other molecules.
Not that I think any effort to do so would be anything but an exercise in being inefficient, or that CO2 is a problem at all.
I remember that one, lol.
They never really detailed the costs involved with the caustic soda, of course, which will need to be replaced constantly and which will corrode their fucking tower from the inside out.
I think the one I'm talking about is in Solar Power Plant. I think they were testing a new design to please "The Entrepreneur" and convince him that you could be profitable.
Um, it's not about the CO2 that's there, it's about the effect of (the proposed idea of) burying solid CO2 in the sea bed.
There will be a huge, global change as that CO2 stops being solid.
Now, we all know that the envirotards fear any and all change, and will panic. Just look at global warming (sorry, global climate change):
Even if we assume humans are causing it (we aren't), and even if we assume we can stop it (we can't), why should we? BECAUSE OMG CHANGE! WE'LL BE FLOODED! ALL MANNER OF LIFE WILL BE RUINED! WE MUST SPEND BILLIONS TO FAIL TO PREVENT THE CHANGE!
It doesn't sublimate at the increased pressure.
It DOES dissolve into the liquid, and it DOES become a gas.
It does it slowly, and yes, it does so even when buried.
(Reposting this here to make sure people see it.)
It might stop sublimating at that pressure, but it still dissolves, and it does so slowly.
A few decades from now the problem would be "OMG WE HAVE TO DIG UP ALL THE CHUNKS OF CO2 OR THE OCEAN WILL DIE!"
The guy above you explained it very well.
But how about a simpler example?
Fish tank + CO2.
Was it Discovery's Project Earth bullshit?
God, I remember them comparing a new breakthrough solar panel and some other thing, and they floated them up into the sky on a balloon, and measured how much electricity they ere getting.
The dirty hippies were overjoyed to the point of tears to learn that the new design put out more electricity.
I think it might have had something to do with the fact that the old design had a about 60% of it's area in shadow. Shadow from a piece of cardboard on a stick, which served no other purpose than to cripple the old design.
Of course, this wasn't mentioned at all.
Sell it to CocaCola?
Costs and pollution during:
Building, shipping, installation, maintenance, removal, replacement.