My guess is, there are different revisions, then are several batches, and the odds of getting exactly the right controller are pretty slim. In addition, how do you know that the controller isn't somehow "linked" to the specific platters?
I replaced a controller once to revive a dead drive. I had to order a used drive off EBAY at an inflated price to do it though. The seller explicitly listed the FULL model number of the drives he was selling. I'm fairly certain his intent was to sell to people in my position. In the end I got the data back and the drive continued to work. I was paranoid so I really only used it as a junk drive from that point on...
But if you do that, then why not just use a different password for each such group? Passwords aren't that hard.
I believe the submitter touched on part of the reason. Inconsistent password policies for length, characters and expiry date. To this day there is one PITA site that won't allow "!" as a password character and it throws my whole system off.
Also, if I want to change my password, with SSO there is one change. With multiple sites....
Single sign-on means that if you're compromised once you're compromised everywhere.
I don't think there is a rule that you have to use a single account. I have multiple gmail accounts to separate hobby sites from work sites, etc.
If you use single sign on for slashdot, gizmodo, etc., I'm not really too concerned. It's not like someone is going to abuse my mod points more than I already do.
For important accounts I'll still use a separate identity/password.
I think there is confusion about SSO being forced for every account.
I would consider using an airtight sealed case, oxygen absorber and a dessicant...
"Stuff" will last longer in the absence of oxygen. Try to replace the air with an inert gas or nitrogen. This is common in food preservation as well where vacuum sealing alone isn't enough. Sometimes the shape of grains or seeds leaves too much space for air.
What facilitates aging? - Oxygen
- Remove oxygen
- Make air tight - Water
- Remove moisture
- Make water tight - Light
- Remove light sources ?
- Make light tight - Excessive heat
- Remove heat sources
- Shield from heat -... -... - Time
- Put in box and accelerate to near the speed of light
The cynic in me wonders if this couple is just trolling for an arrest for a big payout in a civil rights lawsuit. Film cops stopping and frisking, get arrested, sue, profit! That would not really be a sure thing, though, so maybe that's not it.
Good for them if they get paid.
The police continually use financial sanctions to control our behavior with fines. As long as these pay outs cut into their operating budgets I'm all for it. As more and more of them are converted over to bicycle cops due to budget cuts, maybe that will correct some of the hubris.
Great. Now dude, fucking leave if you don't like it here!
You come across like a douche, but technically that was the approach used by Europeans to escape tyranny at home. Unfortunately, I don't think there is anymore free land we can trade glass beads and firewater for. So, now we are forced to deal with people like you.
I was going about my day until I read this article. Then I had to login to Slashdot just to flame this article.
The #1 desktop OS finally, after years of being predominately GUI only, caved into CLI with powershell. They are now moving in the correct direction and this guy NOW believes a CLI is useless for regular users?
Lets not forget who dominates the computer scene; computer nerds. I could walk grandma through screens of settings... OR I could just send a CLI script to check and/or set any options. Scripting and automation alone make CLI indispensable. And don't think end users won't be using these scripts to simply tasks. They may not be writing these scripts but they sure will be using them!
At my employer, we don't really care if you're using Facebook or other "personal use" on your lunch break or occasionally during the day, but where we draw the line is excessive use or browsing porn because the company has a real liability if someone is browsing porn at their desk, and an employee sees it and makes claim for being in a 'hostile workplace'.
Pffft... that's why I only browse tasteful but fully nude *art* while at work.
That leaves $60+/month for things like phone, gas, electricity, clothing, transportation, etc. It's not easy, but it can be done.
If your dignity, self-respect, and enjoyment of life depend on material things then it's not a lack of money that's your problem.
I had to check the parent post because it was almost unbelievable it was the same person. In the parent post you talk about $60/month as left over income; not for entertainment or other indulgences, but for necessities like gas, electricity, clothing, etc.
Then you turn around and spout about materialism as though these theoretical yachts and European vacations won't bring happiness. You are not even on the same page. Materialism isn't deciding between gas or food; or fast food and fresh vegetables, yet those are the hard choices you MUST make with those slim margins.
Put down the "mind altering" skills before you post on slashdot. It will help you make more coherent arguments rather than jumping around the sliding scale of poverty and materialism.
Sales people need to be adept as selling a business story and should be able to talk to project managers and other budget holders about the business benefits of investing in the tool.
You can't cure willful ignorance. If a salesperson actually gave two shits they would pick up a book and learn basic programming skills on their own.
Why not try the same strategy that helps today's programmers constantly learn new languages, libraries, version changes, etc: if you don't keep up... you lose your job to someone who can. It seems to light a fire under the ass of IT people.
Hmm, today must be get-under-my-skin day for trolls. Ah well.
Poverty is a slippery thing - if you can barely afford to feed yourself with a minimum wage job it's not because you're poor, in fact you're far wealthier than most people in the world; it's because you prioritize other things above eating.
Internet quote of the year award.
If you can barely afford to feed yourself... it's because you prioritize other things above eating... like dignity, self-respect, life experiences, anything resembling enjoyment, etc, etc.
And then as they collect your info into nice neat reports, "Oops sorry that got leaked to the public."
Suddenly you no longer have a job.
Oh look this politician has looked at porn, suddenly he can no longer be elected. Oh look you went to an online dating site, please deposit $10,000 or the results will be sent to your wife.
There are a lot bigger issues that policemen wasting their time here.
"One common misconception about Nazi Germany was that the police state was solely a creation of the authorities and that the citizens were merely victims. On the contrary, Gestapo files show that 80% of all Gestapo investigations were started in response to information provided by denunciations by “ordinary” Germans."
Good to see nothing changes. Scared pussies are pretty much the prime force of any police state. There are simply too many people doing too many things for a subset of people (police) to control everything. They rely on fear and sell-outs like you to maintain their control.
One day you're scared of getting caught doing something "unapproved" and the next day you're scared of what will happen if you don't turn in your neighbour for hiding Jews in the basement.
There are bigger issues than policemen wasting their time. The bigger issue is you wasting your life being a pussy.
Uh, no. All that would happen is your taxes will be raised to cover the additional costs. If there is enough political support to back this kind of project, there will be enough money and power behind it to obfuscate the tax increases necessary to continue funding it.
You can't fight the government by wasting their money. They perfected that process long ago.
Correct. Unless there's a very strong correlation that one behavior overwhelmingly leads to another that is a crime, then using one's research to attempt to predict a crime will lead to nothing more than the police showing up to essentially ask you if you're going to commit a crime. Even if you were, you simply say, "I'm sorry officer, but I have no legal obligation to speak with you on this or any other matter."
This sounds like a bigger money sink-hole than "the war on drugs". If this ever became law I'll be sure to purposely draw suspicion several times a day. Eventually I'll be able to bleed the entire police budget on these trivial calls... and I hope everyone does the same.
Just think of the increase in parking fines, speeding tickets for going 1 over the limit, etc, etc, required to pay for this garbage. Nothing is free and if this is how you wish to allocate police resources then you are a complete failure.
The simplified answer was actually the next two sentences in the essay:
'You can drop a mouse down a thousand-yard mine shaft; and, on arriving at the bottom, it gets a slight shock and walks away, provided that the ground is fairly soft. A rat is killed, a man is broken, a horse splashes. For the resistance presented to movement by the air is proportional to the surface of the moving object. Divide an animal’s length, breadth, and height each by ten; its weight is reduced to a thousandth, but its surface only to a hundredth. So the resistance to falling in the case of the small animal is relatively ten times greater than the driving force."
Force = dP / dt P = mass * velocity A mouse weights around ~20g , a horse around ~450kg. If we assume that both of them have the same velocity when touching the floor, the horse will experience a force that is ~22000 times higher. Easily explains the splashing... ( I could go more and calculate an approximation of the value force itself, but I think this is enough )
Yes. But the real question is: What would happen to a bag filled with 22,500 mice (weighing a total of 450kg)? Would the mouse-bag make a splash like the horse? Or would each individual mouse walk away with a slight shock?
NetAPP's product is not RAID6; it's RAID-DP. What they are implementing is definitely not RAID6, specifically they have implemented a proprietary scheme, and it is only marginally less performant than RAID10.
I stand behind my original statement that you should not discount RAID5, RAID6, SATA etc - it is the end metrics that matter.
I don't want to bore you by arguing the same points... but you did specifically draw attention to RAID-DP with a bold not plus an incorrect salesdroid assumption. So I'll serve you up a hot slice of humble pie; directly from NetApp's website:
"RAID-DP is a Double Parity RAID 6 implementation that prevents data loss when two drives fail."
Don't use RAID5 for busy databases. Don't dare use RAID6 for any database. Don't use SATA drives for busy databases. In fact, if you are serious about consolidation, don't use RAID5 or RAID6 period.
Treat the storage like a black box. Come up with an IOPS, bandwidth, and response times and ensure the metrics are hit.
IBM sells an XIV composed entirely off the shelf components on SATA (http://opensystemsguy.wordpress.com/). EMC has dynamically allocated tiering called FAST (http://www.emc.com/about/glossary/fast.htm) over SSD/SAS/SATA. NetApp has cach acceleration but uses RAID-6. They all produce systems to meet enterprise level loads while violating those rules.
Let the vendor size out a system that meets your requirements (metrics) without putting stipulations like above in the RFQ. They only cause problems and often eliminate viable options.
Couple of corrections. HA (high availability) works without vCenter, if a host running vCenter dies HA will restart it on another host like any other VM. A vDS will continue to function you just can't connect VMs to the distributed switch.
You are correct, it is only the ability to reconfigure HA and vDS that is lost with vCenter. Loss of vDS would be critical to the operation of VMs.
I have never actually run vCenter Heartbeat. They effectively make you pay for 2 copies of vCenter and 1 copy of heartbeat. I've had customers interested... until the price comes up. Can't say I disagree.
'cause if you knock it offline by accident, your easiest tool with which to bring it back online is gone?
Kind of like how it's a bad idea to mess with a host's eth0 settings if you're currently logged in via ssh through eth0.
In Oracle VM Server for x86 and VMWare vSphere (and probably most other virtualization platforms) the VMs run on hosts independent of the management platform, ie vCenter for vSphere.
vCenter is not considered critical for the operation of VMs. If vCenter dies your VMs will continue to run without interruption. You simply lose the ability to use advanced features such as vMotion, Storage vMotion, DRS, HA and vDS. However, you can still log into an ESXi host and start up another instance of vCenter. This is no different if the physical machine hosting vCenter died.
As far as I know, the upcoming highly available version of VMWare vCenter (heartbeat) which runs two instances of vCenter together is ONLY available in VM form, I don't know of a physical deployment for vCenter Heartbeat (but I could be wrong).
In enterprise, aren't most busy DB servers using storage on the SAN, which would be exactly the same place where it would be if the server was virtualized?
In an enterprise environment all VMs (of any type) should be coming from external storage either SAN (FC, iSCSI) or NAS (NFS). Storage, Network and Hosts are usually separated into layers with full redundancy. No single point of failure should exist. Even if a host needs to be taken down for maintenance or upgrades etc the VM is migrated live to another host without interruption. Because the data is external it is accessible to all hosts and the hosts can be treated as a commodity item and swapped in/out.
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So what happens when there is a false negative?
Dr: Did you take your pill?
P: Yes
Dr: The pill didn't register; are you sure you didn't forget? You better take another one.
I tried this once, and it didn't work.
My guess is, there are different revisions, then are several batches, and the odds of getting exactly the right controller are pretty slim. In addition, how do you know that the controller isn't somehow "linked" to the specific platters?
I replaced a controller once to revive a dead drive. I had to order a used drive off EBAY at an inflated price to do it though.
The seller explicitly listed the FULL model number of the drives he was selling. I'm fairly certain his intent was to sell to people in my position.
In the end I got the data back and the drive continued to work. I was paranoid so I really only used it as a junk drive from that point on...
But if you do that, then why not just use a different password for each such group? Passwords aren't that hard.
I believe the submitter touched on part of the reason. Inconsistent password policies for length, characters and expiry date.
To this day there is one PITA site that won't allow "!" as a password character and it throws my whole system off.
Also, if I want to change my password, with SSO there is one change. With multiple sites....
Passwords may not be hard... but SSO is easier.
Single sign-on means that if you're compromised once you're compromised everywhere.
I don't think there is a rule that you have to use a single account. I have multiple gmail accounts to separate hobby sites from work sites, etc.
If you use single sign on for slashdot, gizmodo, etc., I'm not really too concerned. It's not like someone is going to abuse my mod points more than I already do.
For important accounts I'll still use a separate identity/password.
I think there is confusion about SSO being forced for every account.
I would consider using an airtight sealed case, oxygen absorber and a dessicant...
"Stuff" will last longer in the absence of oxygen. Try to replace the air with an inert gas or nitrogen. This is common in food preservation as well where vacuum sealing alone isn't enough. Sometimes the shape of grains or seeds leaves too much space for air.
What facilitates aging? ... ...
- Oxygen
- Remove oxygen
- Make air tight
- Water
- Remove moisture
- Make water tight
- Light
- Remove light sources ?
- Make light tight
- Excessive heat
- Remove heat sources
- Shield from heat
-
-
- Time
- Put in box and accelerate to near the speed of light
I wonder if PETA will complain about 0xDEADBEEF?
I've seen that used often.
The cynic in me wonders if this couple is just trolling for an arrest for a big payout in a civil rights lawsuit. Film cops stopping and frisking, get arrested, sue, profit! That would not really be a sure thing, though, so maybe that's not it.
Good for them if they get paid.
The police continually use financial sanctions to control our behavior with fines. As long as these pay outs cut into their operating budgets I'm all for it. As more and more of them are converted over to bicycle cops due to budget cuts, maybe that will correct some of the hubris.
Great. Now dude, fucking leave if you don't like it here!
You come across like a douche, but technically that was the approach used by Europeans to escape tyranny at home. Unfortunately, I don't think there is anymore free land we can trade glass beads and firewater for. So, now we are forced to deal with people like you.
I was going about my day until I read this article. Then I had to login to Slashdot just to flame this article.
The #1 desktop OS finally, after years of being predominately GUI only, caved into CLI with powershell. They are now moving in the correct direction and this guy NOW believes a CLI is useless for regular users?
Lets not forget who dominates the computer scene; computer nerds. I could walk grandma through screens of settings... OR I could just send a CLI script to check and/or set any options. Scripting and automation alone make CLI indispensable. And don't think end users won't be using these scripts to simply tasks. They may not be writing these scripts but they sure will be using them!
I'm all for science and testing, but damn. Imagine feeling like you are choking to death for 15 minutes...
Your mom never complained.
At my employer, we don't really care if you're using Facebook or other "personal use" on your lunch break or occasionally during the day, but where we draw the line is excessive use or browsing porn because the company has a real liability if someone is browsing porn at their desk, and an employee sees it and makes claim for being in a 'hostile workplace'.
Pffft... that's why I only browse tasteful but fully nude *art* while at work.
That leaves $60+/month for things like phone, gas, electricity, clothing, transportation, etc. It's not easy, but it can be done.
If your dignity, self-respect, and enjoyment of life depend on material things then it's not a lack of money that's your problem.
I had to check the parent post because it was almost unbelievable it was the same person. In the parent post you talk about $60/month as left over income; not for entertainment or other indulgences, but for necessities like gas, electricity, clothing, etc.
Then you turn around and spout about materialism as though these theoretical yachts and European vacations won't bring happiness. You are not even on the same page. Materialism isn't deciding between gas or food; or fast food and fresh vegetables, yet those are the hard choices you MUST make with those slim margins.
Put down the "mind altering" skills before you post on slashdot. It will help you make more coherent arguments rather than jumping around the sliding scale of poverty and materialism.
I wouldn't even try.
Sales people need to be adept as selling a business story and should be able to talk to project managers and other budget holders about the business benefits of investing in the tool.
You can't cure willful ignorance. If a salesperson actually gave two shits they would pick up a book and learn basic programming skills on their own.
Why not try the same strategy that helps today's programmers constantly learn new languages, libraries, version changes, etc: if you don't keep up... you lose your job to someone who can. It seems to light a fire under the ass of IT people.
Hmm, today must be get-under-my-skin day for trolls. Ah well.
Poverty is a slippery thing - if you can barely afford to feed yourself with a minimum wage job it's not because you're poor, in fact you're far wealthier than most people in the world; it's because you prioritize other things above eating.
Internet quote of the year award.
If you can barely afford to feed yourself... it's because you prioritize other things above eating... like dignity, self-respect, life experiences, anything resembling enjoyment, etc, etc.
Now get back to work peon.
And then as they collect your info into nice neat reports, "Oops sorry that got leaked to the public."
Suddenly you no longer have a job.
Oh look this politician has looked at porn, suddenly he can no longer be elected. Oh look you went to an online dating site, please deposit $10,000 or the results will be sent to your wife.
There are a lot bigger issues that policemen wasting their time here.
"One common misconception about Nazi Germany was that the police state was solely a creation of the authorities and that the citizens were merely victims. On the contrary, Gestapo files show that 80% of all Gestapo investigations were started in response to information provided by denunciations by “ordinary” Germans."
Good to see nothing changes. Scared pussies are pretty much the prime force of any police state. There are simply too many people doing too many things for a subset of people (police) to control everything. They rely on fear and sell-outs like you to maintain their control.
One day you're scared of getting caught doing something "unapproved" and the next day you're scared of what will happen if you don't turn in your neighbour for hiding Jews in the basement.
There are bigger issues than policemen wasting their time. The bigger issue is you wasting your life being a pussy.
Uh, no. All that would happen is your taxes will be raised to cover the additional costs. If there is enough political support to back this kind of project, there will be enough money and power behind it to obfuscate the tax increases necessary to continue funding it.
You can't fight the government by wasting their money. They perfected that process long ago.
Has the behavior of the TSA taught us nothing?
In the short-term, you are correct. But eventually you cannot kick the debt can down the road any further. This reality is already hitting parts of Europe and parts of the US:
http://www.businessinsider.com/americas-most-bankrupt-cities-2010-12
Correct. Unless there's a very strong correlation that one behavior overwhelmingly leads to another that is a crime, then using one's research to attempt to predict a crime will lead to nothing more than the police showing up to essentially ask you if you're going to commit a crime. Even if you were, you simply say, "I'm sorry officer, but I have no legal obligation to speak with you on this or any other matter."
This sounds like a bigger money sink-hole than "the war on drugs". If this ever became law I'll be sure to purposely draw suspicion several times a day. Eventually I'll be able to bleed the entire police budget on these trivial calls... and I hope everyone does the same.
Just think of the increase in parking fines, speeding tickets for going 1 over the limit, etc, etc, required to pay for this garbage. Nothing is free and if this is how you wish to allocate police resources then you are a complete failure.
The simplified answer was actually the next two sentences in the essay:
'You can drop a mouse down a thousand-yard mine shaft; and, on arriving at the bottom, it gets a slight shock and walks away, provided that the ground is fairly soft. A rat is killed, a man is broken, a horse splashes. For the resistance presented to movement by the air is proportional to the surface of the moving object. Divide an animal’s length, breadth, and height each by ten; its weight is reduced to a thousandth, but its surface only to a hundredth. So the resistance to falling in the case of the small animal is relatively ten times greater than the driving force."
You are debating a single sentence of an essay that is an amazing read to say the least. I highly recommend reading it: http://irl.cs.ucla.edu/papers/right-size.html
Force = dP / dt
P = mass * velocity
A mouse weights around ~20g , a horse around ~450kg. If we assume that both of them have the same velocity when touching the floor, the horse will experience a force that is ~22000 times higher. Easily explains the splashing... ( I could go more and calculate an approximation of the value force itself, but I think this is enough )
Yes. But the real question is: What would happen to a bag filled with 22,500 mice (weighing a total of 450kg)?
Would the mouse-bag make a splash like the horse? Or would each individual mouse walk away with a slight shock?
She is the most famous pilot ever...
Really, the most famous pilot EVAR? More famous than the Wright brothers?
NetAPP's product is not RAID6; it's RAID-DP. What they are implementing is definitely not RAID6,
specifically they have implemented a proprietary scheme, and it is only marginally less performant than RAID10.
I stand behind my original statement that you should not discount RAID5, RAID6, SATA etc - it is the end metrics that matter.
I don't want to bore you by arguing the same points... but you did specifically draw attention to RAID-DP with a bold not plus an incorrect salesdroid assumption. So I'll serve you up a hot slice of humble pie; directly from NetApp's website:
"RAID-DP is a Double Parity RAID 6 implementation that prevents data loss when two drives fail."
http://www.netapp.com/us/products/platform-os/raid-dp.html
I know how RAID-DP differs; but fundamentally it is RAID-6. I am familiar with SAN and NAS on a technical level.
Don't use RAID5 for busy databases. Don't dare use RAID6 for any database.
Don't use SATA drives for busy databases.
In fact, if you are serious about consolidation,
don't use RAID5 or RAID6 period.
Treat the storage like a black box. Come up with an IOPS, bandwidth, and response times and ensure the metrics are hit.
IBM sells an XIV composed entirely off the shelf components on SATA (http://opensystemsguy.wordpress.com/). EMC has dynamically allocated tiering called FAST (http://www.emc.com/about/glossary/fast.htm) over SSD/SAS/SATA. NetApp has cach acceleration but uses RAID-6. They all produce systems to meet enterprise level loads while violating those rules.
Let the vendor size out a system that meets your requirements (metrics) without putting stipulations like above in the RFQ. They only cause problems and often eliminate viable options.
Couple of corrections. HA (high availability) works without vCenter, if a host running vCenter dies HA will restart it on another host like any other VM. A vDS will continue to function you just can't connect VMs to the distributed switch.
You are correct, it is only the ability to reconfigure HA and vDS that is lost with vCenter. Loss of vDS would be critical to the operation of VMs.
I have never actually run vCenter Heartbeat. They effectively make you pay for 2 copies of vCenter and 1 copy of heartbeat. I've had customers interested... until the price comes up. Can't say I disagree.
'cause if you knock it offline by accident, your easiest tool with which to bring it back online is gone?
Kind of like how it's a bad idea to mess with a host's eth0 settings if you're currently logged in via ssh through eth0.
In Oracle VM Server for x86 and VMWare vSphere (and probably most other virtualization platforms) the VMs run on hosts independent of the management platform, ie vCenter for vSphere.
vCenter is not considered critical for the operation of VMs. If vCenter dies your VMs will continue to run without interruption. You simply lose the ability to use advanced features such as vMotion, Storage vMotion, DRS, HA and vDS. However, you can still log into an ESXi host and start up another instance of vCenter. This is no different if the physical machine hosting vCenter died.
As far as I know, the upcoming highly available version of VMWare vCenter (heartbeat) which runs two instances of vCenter together is ONLY available in VM form, I don't know of a physical deployment for vCenter Heartbeat (but I could be wrong).
In enterprise, aren't most busy DB servers using storage on the SAN, which would be exactly the same place where it would be if the server was virtualized?
In an enterprise environment all VMs (of any type) should be coming from external storage either SAN (FC, iSCSI) or NAS (NFS). Storage, Network and Hosts are usually separated into layers with full redundancy. No single point of failure should exist. Even if a host needs to be taken down for maintenance or upgrades etc the VM is migrated live to another host without interruption. Because the data is external it is accessible to all hosts and the hosts can be treated as a commodity item and swapped in/out.