Re:RAID5 is stupid, RAID 10 or no RAID
on
What NAS To Buy?
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· Score: 3, Informative
Yes, a faulty controller could potentially corrupt the RAID, but major data loss shouldn't happen with RAID5; the checksums would fail on the next read.
Worse: If a hardware raid5 controller dies, you have to replace it with one exactly the same (or very compatible), or you never see your data again. Each vendor uses different checksum methods, etc.
If you use software raid, you don't have to worry about the controller, or even the motherboard dying; you can put the drives into any computer which can run the same software (OS), and read/write no prob.
Re:RAID5 is stupid, RAID 10 or no RAID
on
What NAS To Buy?
·
· Score: 1
RAID10 will only guarantee data security with one drive failure. With RAID 10, there's an approximately 1/3 chance that the second drive to fail will cause you to lose all your data.
You may be thinking of RAID 01... RAID 10 can lose ANY TWO drives from a 4-disk set, if it's true RAID 10.
And there's nothing here that wouldn't be easily found Googling for "cheap nas"
It's hard to find the compact and low-power stuff on Google without a LOT of reading. e.g., I looked at many forums, articles, etc., before I found the Intel SS4200 series devices, or the Chenbro NAS/home server case.
Most of the articles on the internet about "cheap NAS" are several years old and don't cover any recent hardware.
One more thing... Intel has a new 4-drive (SATA2) NAS server which is only $430 on Amazon, and comes with EMC software, or you can put FreeNAS, OpenFiler, or WHS on it. Model # is SS4200E and SS4200EHW
The EHW doesn't come with the EMC software, and is supposed to be $100 less, but the actual price difference right now is less than $30.
They also have 2 eSATA ports.
Or, you can get a Chenbro NAS case with 4 hot-swap SATAII bays. It's about $230 with the power supply, and holds an Mini-ITX motherboard. The new Intel Atom boards are really cheap, although the VIA C7's currently use less power.
I suspect that if WHS gets more popular, a lot more cases like this will start popping up, hopefully cheaper... $220 is awfully high for a mini-ITX case.
Or OpenFiler, also free and open-source, but Linux-based instead of BSD, and also has nice SAN features like iSCSI target support. http://www.openfiler.com/
Not sure why, but I got into TFA without any nags.
Furthermore, the other article isn't the same; for instance you missed this great quote:
"Let it be remembered that throughout almost 14 years of life he worked a 24-hour shift on one dreary problem after another without complaining and spent, at the most, only a few hours off sick," the computer's obituary said.
Except for the "without complaining" part, I'd think they must be talking about Marvin.
you might want to check out Astaro. There's a free home use license. Traffic shaping lets you cap your p2p bandwidth, or guarantee bandwidth for your voip traffic. It can install on x86 hardware, so plenty of horsepower.
Even better, high oil prices are actually making people think about public transportation again. For the financially savvy, that is awesome news. It would be great to be able to live in the U.S. without a car. I would be proud to dump the 2nd most expensive household asset that depreciates in value significantly.
My morning commute is now consistently 5 minutes faster in the morning and 15 minutes faster in the evening because the number of cars on the road has dropped that much.
Nothing to do with schools being out for the summer? I always see a huge difference in commute time during school vacations.
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Yes, a faulty controller could potentially corrupt the RAID, but major data loss shouldn't happen with RAID5; the checksums would fail on the next read.
Worse:
If a hardware raid5 controller dies, you have to replace it with one exactly the same (or very compatible), or you never see your data again. Each vendor uses different checksum methods, etc.
If you use software raid, you don't have to worry about the controller, or even the motherboard dying; you can put the drives into any computer which can run the same software (OS), and read/write no prob.
RAID10 will only guarantee data security with one drive failure. With RAID 10, there's an approximately 1/3 chance that the second drive to fail will cause you to lose all your data.
You may be thinking of RAID 01...
RAID 10 can lose ANY TWO drives from a 4-disk set, if it's true RAID 10.
http://en.wikipedia.org/wiki/Nested_RAID_levels
Some people who do HPC tell me all the HP controllers are slow, in any mode, if you hook enough disks to them.
Forgot to mention the current Atom board is only 10/100 ethernet, which sucks bigtime.
The SS4200's have gigE.
Drobo is expensive, and uses USB drives... maybe they'll have a SATA one someday.
The Intel SS4200 is MUCH cheaper than Drobo + the NAS adapter. I also posted here about a cheap DIY hotswap 2-drive setup using a Chenbro case.
OpenFiler is a free, open-source NAS/SAN server which can provide iSCSI targets, fwiw.
And there's nothing here that wouldn't be easily found Googling for "cheap nas"
It's hard to find the compact and low-power stuff on Google without a LOT of reading.
e.g., I looked at many forums, articles, etc., before I found the Intel SS4200 series devices, or the Chenbro NAS/home server case.
Most of the articles on the internet about "cheap NAS" are several years old and don't cover any recent hardware.
One more thing... Intel has a new 4-drive (SATA2) NAS server which is only $430 on Amazon, and comes with EMC software, or you can put FreeNAS, OpenFiler, or WHS on it.
Model # is SS4200E and SS4200EHW
The EHW doesn't come with the EMC software, and is supposed to be $100 less, but the actual price difference right now is less than $30.
They also have 2 eSATA ports.
Or, you can get a Chenbro NAS case with 4 hot-swap SATAII bays. It's about $230 with the power supply, and holds an Mini-ITX motherboard.
The new Intel Atom boards are really cheap, although the VIA C7's currently use less power.
I suspect that if WHS gets more popular, a lot more cases like this will start popping up, hopefully cheaper... $220 is awfully high for a mini-ITX case.
Or OpenFiler, also free and open-source, but Linux-based instead of BSD, and also has nice SAN features like iSCSI target support.
http://www.openfiler.com/
Not sure why, but I got into TFA without any nags.
Furthermore, the other article isn't the same; for instance you missed this great quote:
Except for the "without complaining" part, I'd think they must be talking about Marvin.
My dad has a Netgear that looks like that; it constantly overheats and completely drops wifi connections (ethernet works fine).
Ventilating it and adding some aluminum fins onto the main chip helped only somewhat.
I wonder, is this new one any better?
you might want to check out Astaro. There's a free home use license. Traffic shaping lets you cap your p2p bandwidth, or guarantee bandwidth for your voip traffic. It can install on x86 hardware, so plenty of horsepower.
Astaro's web site is http://www.astaro.com/ and their community support forums are at http://www.astaro.org/
It needs a PIII or better, with 512MB RAM or more, but is VERY full-featured... VPNS, SMTP relay, http content filtering and antivirus, QOS, ...
Cool. Turns out it's been over 80% humid at night here lately. (so Cal, 63F and 84% humidity at the moment.)
Even better, high oil prices are actually making people think about public transportation again. For the financially savvy, that is awesome news. It would be great to be able to live in the U.S. without a car. I would be proud to dump the 2nd most expensive household asset that depreciates in value significantly.
What's the first, the wife?Nothing to do with schools being out for the summer? I always see a huge difference in commute time during school vacations.
Those housing prices you mention include the cost of the land, not just the construction labor & materials, and they are
"Average per square metre (sq. m.) prices in US$/â of 120-sq. m. apartments located in the centre of the most important city of each country"
The centers of major European cities are probably much more crowded than most major American cities.
I'm sure that Manhattan and San Francisco are much higher that $125/sq ft.
This is from 2005, but there's a Slashdot article titled "Google donating bandwidth and servers to Wikipedia".
Obviously, it should be used to find The Ultimate Question.
Yahoo gets over a billion page views per day. ...
Note that's different than 'http hits' or 'http requests' as those latter 2 include images, JS, CSS,
IIRC, Google (and Yahoo) are big contributors to the Wikimedia foundation.
Obviously it didn't occur to you that Architecture has meanings other than what you do.
Maybe Atari should bury all the games in a landfill before any more bad reviews get out.
I know about relative humidity.
I have no idea where you're finding -30C air... maybe you should sell it.
I'm in southern California; on a cool summer's night, it might get down to the high 50's Fahrenheit with 70% or higher humidity.
Outside air can be very humid at night... not sure how high humidity it's safe to run a datacenter at though.
The monitor is probably the culprit, not the computer.