The 8 hours/day is referring to personal storage (as opposed to enterprise storage systems,) and this discussion is supposed to be about enterprise storage, so I'm off topic anyway. (BTW, the whitepaper I linked to does specify it as MTBF, for what it's worth)
I was able to quickly find at least one reference to this measure (8 hours/300 days a year for personal storage [PS] drives, 24 hours 265 for enterprise storage [ES] drives.)
The most significant difference in the reliability specifica-
tion of PS and ES drives is the expected power-on hours
(POH) for each drive type. The MTBF calculation for PS
assumes a POH of 8 hours/day for 300 days/year1 while the
ES specification assumes 24 hours per day, 365 days per
year.
I have had 3 personal use hard drives go bad in the last 5 years, they were either Maxtor or Wester Digital. I am not hard on the drives other than leaving them on 24/7.
Ever read the manufacturer's fine print on how they determine MTBF? Last time I did (yeah, it was over a year ago,) it read: "8 hour a day usage." Drives that are on 24/7 get HOT, and heat leads to mechanical failure.
The manufacturers of high-quality converters struggled mightily to produce 1-bit devices that met the performance goals of the industry. But, they could never eliminate all the undesirable artefacts of such converters, and after more than a decade of trying, they came to the realization that they could produce better performance by using multi-bit converter architectures in their products.
Anyway, you are technically correct in pointint out the flaw in my wording. People use multi-gigasample ADCs when doing things not related to audio. And yes, many audio-frequency ADCs do oversampling internally... but the output is still on the order of 44 to 96 kHz at full-bit width (16/24 bits).
can you REALLY tell the difference between 256khz and 512khz (hint: if you say 'yes', you are lying).
What the hell are you talking about? Nobody in their right mind would use a sampling rate of 256khz for so many reasons I won't even start listing them here... Since you are probably referring to kbps, I am still confused. 512kbps is not a valid rate for an "MP3" file.
can you REALLY tell the difference between 256khz and 512khz (hint: if you say 'yes', you are lying)
YES, I can REALLY tell the difference between a filtered audio file and a compressed audio file. Some people still listen to music that was created by real instruments, you know. The easiest way I have found to hear the difference is when listening to various cymbals and string instruments. When filtered, the high frequencies sound like they are eminating from a tin-can. Maybe your high-frequency range has been too damaged because the volume on your iPod is set too high...
Being from Canada, I was surprised to find that these devices do exist, and are quite common in other parts of the world. Apparently, many places do not run both hot and cold water lines in buildings for some reason or another (it's so hot outside that people don't care to have a hot-water tap in their sink, perhaps?) From the few people I've talked to that have used these showers, they say that sometimes you feel a "buzz"... not surprising since they are often 10kW!!!
the option to set set my system clock to GMT or local sounds like the option to spend my time caring about something I don't have to for no discernable reason. There may be some reason to want this option, but it is not apparent to me, and the lack of it doesn't seem to have crippled Windows adoption.
It may not have crippled Windows adoption, but it sure doesn't help the adoption of other operating systems. Since most other operating systems have the hardware clock set to UTC by default, when you set the time in a another OS and set the hardware clock, it is off when you switch your machine back to Windows. This can be very annoying to someone that doesn't understand the problem and would like to switch back and forth regularly.
However, since you do not have this problem, you can very well continue not caring if you wish:-)
I'm not sure that you read the post you were replying to correctly:
Windows CANNOT use UTC and display local time. It is the only operating system that REQUIRES that the system clock and the hardware clock be set to the same time.
The key words there are "use UTC" and "display local time." Windows sets the hardware clock to the local time. On many other operating systems, you can set your hardware clock to UTC (note: UTC != GMT) and have the local time still displayed properly by setting the system's timezone.
Just because you "know [how] to get a timestamp in several coding environments [in UTC]", it doesn't mean your hardware clock is set to UTC.
Thing is I'm not sat behind a computer 24/7/365, just for the hours of my job and a few hours at home. I certainly wouldn't consider spending my holidays/vacations sitting behind a computer.
Get more open source code created and released for the benefit of all
Inspire young developers to begin participating in open source development
Help open source projects identify and bring in new developers and committers
Provide students in Computer Science and related fields the
opportunity to do work related to their academic pursuits during the
summer (think "flip bits, not burgers")
Give students more exposure to real-world software development
scenarios (e.g., distributed development, software licensing questions,
mailing-list etiquette)
You are not who they are targeting, so do not worry about how other people choose to spend their free time.
The Power Inverter that you plug into the wall and then into the laptop converts the 120vAC down to anywhere from 15vDC to 30vDC.
You may want to check your definition of "inverter" against the rest of the world.
Electronic Devices cannot run on AC voltages and especially precision electronics such as Computers would be extremely damaged from the application of such AC voltages ANYWHERE in the system.
Not if both the DC voltage and DC return are both "floating" on an AC voltage. This was the case with a Toshiba A70 notebook that I hooked up to a scope. Poorly designed power supplies are common, and this problem is not limited to notebook computers.
I have scoped the chassis on a Toshiba A70 after noticing a slight sensation while touching the speaker grills... I forget the exact voltage potential, but it was somewhere between 20-60VAC on the speaker grills.
The FX-991MS was my favorite calculator as well. I have made good use of the two I own, you can even do calculus on them... well... sometimes, if you're lucky the calculator can do it faster than you can. The equation solver helped me out a lot too when double-checking. And now that I have finished my formal education (for now) I use it mainly for it's "BASE" mode.
It's nice that they have these, but it's really not that super special. Why is this front page news?
Maybe it's not super special... but check this paper out. Figure 1 in particular (yeah... they are comparing 10k 3.5" to 10k 2.5"... it's an old paper, but the theory is the same.)
Who would want faster 2.5" drives? People who want 6 drives in 1U instead of in 2U. People who want faster drives in their blade servers.
Slashdot Mirror
Acronyms schmackronyms... anyway, I found at least one paper that I read in the past that states the 8 hours/day thing I was referring to: http://www.seagate.com/content/docs/pdf/whitepaper /D2c_More_than_Interface_ATA_vs_SCSI_042003.pdf
The 8 hours/day is referring to personal storage (as opposed to enterprise storage systems,) and this discussion is supposed to be about enterprise storage, so I'm off topic anyway. (BTW, the whitepaper I linked to does specify it as MTBF, for what it's worth)Ha, that's good one... suggesting that a SB audigy can do the kind of DSP the GPP was requiring on a 30MHz signal... that made my day. :-)
<flamebait>Yes, and DSD is not what people in their right mind use ;-)</flamebait>
From Why 1-Bit Sigma-Delta Conversion is Unsuitable for High-Quality Applications :
Anyway, you are technically correct in pointint out the flaw in my wording. People use multi-gigasample ADCs when doing things not related to audio. And yes, many audio-frequency ADCs do oversampling internally... but the output is still on the order of 44 to 96 kHz at full-bit width (16/24 bits).
What, you wouldn't want to shower in something like this?
Being from Canada, I was surprised to find that these devices do exist, and are quite common in other parts of the world. Apparently, many places do not run both hot and cold water lines in buildings for some reason or another (it's so hot outside that people don't care to have a hot-water tap in their sink, perhaps?) From the few people I've talked to that have used these showers, they say that sometimes you feel a "buzz"... not surprising since they are often 10kW!!!
It may not have crippled Windows adoption, but it sure doesn't help the adoption of other operating systems. Since most other operating systems have the hardware clock set to UTC by default, when you set the time in a another OS and set the hardware clock, it is off when you switch your machine back to Windows. This can be very annoying to someone that doesn't understand the problem and would like to switch back and forth regularly.
However, since you do not have this problem, you can very well continue not caring if you wish :-)
How dare you blame the man who has ridden the mighty moon worm!
Of course, I found the link I was looking for in my previous reply: Why does Windows keep your BIOS clock on local time?
I'm not sure that you read the post you were replying to correctly:
The key words there are "use UTC" and "display local time." Windows sets the hardware clock to the local time. On many other operating systems, you can set your hardware clock to UTC (note: UTC != GMT) and have the local time still displayed properly by setting the system's timezone.
Just because you "know [how] to get a timestamp in several coding environments [in UTC]", it doesn't mean your hardware clock is set to UTC.
Google Summer of CodeTM has several goals:
You are not who they are targeting, so do not worry about how other people choose to spend their free time.
Arrested for loitering?
I kid, I kid
I don't know if this is a good idea or an awesome idea.
I have scoped the chassis on a Toshiba A70 after noticing a slight sensation while touching the speaker grills... I forget the exact voltage potential, but it was somewhere between 20-60VAC on the speaker grills.
Because I suck at those slide/shuffle puzzles.
When you need to make Bender jump from girder to girder. I always end up falling :-(. Haven't picked up then game in months because of that spot.
My thoughts exactly (aka. "me too!")
Another case of euphemisms gone wrong.
The FX-991MS was my favorite calculator as well. I have made good use of the two I own, you can even do calculus on them... well... sometimes, if you're lucky the calculator can do it faster than you can. The equation solver helped me out a lot too when double-checking. And now that I have finished my formal education (for now) I use it mainly for it's "BASE" mode.
No, I think most people know where it came from:
"Could Jesus microwave a burrito so hot that he himself could not eat it?"
Maybe it's not super special... but check this paper out. Figure 1 in particular (yeah... they are comparing 10k 3.5" to 10k 2.5"... it's an old paper, but the theory is the same.)
Who would want faster 2.5" drives? People who want 6 drives in 1U instead of in 2U. People who want faster drives in their blade servers.