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#81
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Is it me or are there many unreliable USB flash drives?
In article , Doc O'Leary
wrote: it was defective. hd ipods might get warm but never blazingly hot. It was operating fine *for how it was designed*. Which was to *briefly* use the HD to transfer music either to sync with the computer or into RAM to play it. It was *not* designed to be constantly used as a Firewire drive. actually, it was. ipods could be put into firewire disk mode which kept the disk spinning continuously. spinning up the drive for a few seconds to cache music into memory was done to extend battery life, not reduce heat. in fact, apple had planned on ipods being used for portable home folders in panther. however, that feature was dropped for unknown reasons, almost certainly due to issues with syncing (which they still can't get right), not heat. http://appleinsider.com/articles/06/...home_on_ipod_f eature_resurfaces_in_filing "Ever thought you could carry your home in the palm of your hands or in your pocket? You can. Panther's Home on iPod feature lets you store your home directory - files, folders, apps - on your iPod (or any FireWire hard drive) and take it with you wherever you go," Apple had written in a blurb on its Panther preview website that was eventually removed. "When you find yourself near a Panther-equipped Mac, just plug in the iPod, log in, and you're 'home,' no matter where you happen to be," the description continued. "And when you return to your home computer, you can synchronize any changes you've made to your files by using File Sync, which automatically updates offline changes to your home directory." Stop talking like youąre an authority on all things. You come across like just another nameless idiot when you do that. nothing more than insults. cite facts, if you have any. i'm not making a blanket assumption. i'm saying that a lot of usb flash drives run warm, sometimes even hot, without any issue. it's not unusual and not necessarily the reason why something might fail. You have no idea what may or may not be łunusual˛ for any particular device when you havenąt even seen the manufacturerąs specs. Keep quiet on such matters until you educate yourself. neither do you. a manufacturer is not going to intentionally release a product that runs outside its own design specs. a lot of products run hot without any issue, including hard drives, usb sticks and many other things. it's almost always normal. i have a few 7200 rpm hard drives that run so hot i can't even touch the drive itself. the enclosure gets *very* warm. |
#82
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Is it me or are there many unreliable USB flash drives?
Computer Nerd Kev wrote
Rod Speed wrote Computer Nerd Kev wrote Rod Speed wrote Computer Nerd Kev wrote nospam wrote Computer Nerd Kev wrote There are USB voltage meters sold cheaply on Ebay to show if the USB voltage from a computer is too high/low. If the USB voltage was far too high, the extra energy would cause excessive heating of the drive. if the voltage was too high, not only would it not be usb compliant, but it would likely fry anything plugged into it, which is expecting a regulated 5v. I don't mean by design (although anything's possible with Chinese knock-off stuff, if that's involved), I mean due to a failure of the computer hardware. Now the 5V at the USB ports being high would often only make sense if they were supplied by a separate line from the power supply. They are in desktops. That's the whole point of the +5V standby line. No it isn't. Yes it is. The 5V Standby line is to enable the motherboard hardware to detect when the power switch is pressed, and on many motherboards it is used to power additional functions while the computer is off as well. Like the USB so moving the mouse will wake the system if you have set it up like that. Standby 5V isn't there for when the computer is in standby, Corse it is. You don’t need 2A to be able to detect that the power button has been pressed. but when it's (as far as the user is concerned) powered off - look it up, or just plug a working power supply in to the mains and look for the standby 5V even when there's no motherboard attached and it's in its powered-off state - there'll be 5V on the "standby" supply line. Irrelevant to the fact that its there to power the USB when the system is turned off so you can turn it on by moving the mouse, tapping the keyboard, and with wake on lan etc. Actually, I'm such a nice guy that I've found a link for you: http://www.pcguide.com/ref/power/sup...ftPower-c.html Irrelevant to what is being discussed, as always with your ****. If the internal computer components and the USB ports were both subjected to a failure of the 5V voltage regulation, it would be very likely to destroy the computer without the user having any time to worry about their USB accessories. Depends on how much its out by. Certainly if its out by enough to see what normally stays at room temp get very hot when doing nothing with just the USB stick plugged in, doing nothing. The maximum voltage ratings would probably only be known by the memory stick IC manufacturers and their clients, Wrong again, its obviously in the specs of the ics. Which most often won't be viewable by the general public. Irrelevant. What's the actual model number of the flash chips in your memory sticks? Too hard to get into them and they arent mine to **** with anyway. But again, irrelevant, because even if that was say 7V, that isnt going to be enough so the memory sticks that don?t even get warm when supplied with 5V when not doing anything get very hot when they are supplied with 7V. Basic physics. however 5.5V is a common design maximum. Not with the absolute maximum above which you get damage. Why I said design maximum. Absolute maximums are not always specified. Bull****. 7V is common with some families of 5V ICs. And even that isnt going to see a USB stick that doesn’t even get warm when doing nothing, get very hot when supplied with 7V due to a fault. 5.25V is the maximum PSU output under the ATX specification. Irrelevant to a potential fault situation. Just perspective. Irrelevant waffle, actually. Most desktop PCs have standard power supplies that provide the USB 5V from the same lines as everything else, That is just plain wrong. Its usually supplied by the +5V standby line, so you can wake the system by moving the mouse etc. so it is unlikely that an over-voltage situation would only affect the USB ports. You have that completely backwards. A laptop, however, may have a separate power supply circuit for the USB 5V. If this failed, and supplied too high a voltage, it may not sevierely affect the normal operation of the computer. In fact laptops are more likely to have a separate +5V line for the same reason. A power-boosted USB hub with a faulty or incorrectly specified mains adapter powering it could also be a culprit. the amount of current sourced is limited by what the device negotiates from the host. Current limiting only protects against an over-voltage situation if the device requires more than the minimum current limit (500mA) to be damaged. If an IC in the memory stick normally draws 20mA at 5V, it may draw 28mA at 7V (this based on rough calculations: 5V / 0.02A = 250R 7V / 250R = 0.028A, but it proves the point), however the IC may only be rated to sustain 5.5V, so it may be damaged while only consuming 28mA. The rest of the components in the memory stick will also be drawing additional power, but you see that the total power draw is not increased enough to hit the 500mA maximum if the stick normally draws, say, 100mA? Another possibility, if you only ever use one USB port (or a group of similarly affected ones) for testing these memory sticks, is that a high resistance in the computer's USB socket is causing the _socket_ to heat up, and the heat is being transferred to the drives themselves via the USB connector. Here, not only the heat, but also the coresponding reduced power to the memory stick, may induce irrecoverable write errors or other failures. unlikely. Such failures are known to occour due to strain on solder joints causing them to break, or joints that weren't correctly soldered in the first place. It is a less common failure, but it's also uncommon to consume large quantities of memory sticks. But doesn?t explain why all the sticks get hot. "a high resistance in the computer's USB socket is causing the _socket_ to heat up, and the heat is being transferred to the drives themselves via the USB connector." Even sillier than you usually manage. That would see the connector much hotter than the body of the stick itself. YES. But with it mostly inside the computer, the user is unlikely to notice that difference. Bull****, particularly when they use an extension so its easier to plug the stick in. And you only get that sort of result with high current devices anyway. USB sticks arent. The socket is the bit in the computer. Duh. If the same socket/s are used, It isnt. He gets the same problem with more than one computer. Yep, and that bit of information means that this isn't the problem, so I hereby terminate this argument, You don’t get to terminate anything, ever. my points all adequately made You never had a point, just flaunted your pig ignorance and complete lack of any diagnostic skill. |
#83
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Is it me or are there many unreliable USB flash drives?
In comp.sys.ibm.pc.hardware.storage Ant wrote:
In comp.sys.mac.hardware.storage nospam wrote: In article , Ant wrote: luck has nothing to do with it. don't buy crap. simple as that. Which brands of USB flash drives aren't crap then? SanDisk? PNY? name brands. I used name brands like SanDisk. :P I think he's gone into "say anything that makes him sound right" mode. -- __ __ #_ |\| | _# |
#84
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Is it me or are there many unreliable USB flash drives?
In message
Doc O'Leary wrote: For your reference, records indicate that nospam wrote: it was defective. hd ipods might get warm but never blazingly hot. It was operating fine *for how it was designed*. Which was to *briefly* use the HD to transfer music either to sync with the computer or into RAM to play it. It was *not* designed to be constantly used as a Firewire drive. It was. In fact, for a good deal of time, my 1st generation ipod was my bootable installer for OS X. -- Eyes the shady night has shut/Cannot see the record cut And silence sounds no worse than cheers/After earth has stopped the ears. |
#85
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Is it me or are there many unreliable USB flash drives?
For your reference, records indicate that
nospam wrote: In article , Doc O'Leary wrote: it was defective. hd ipods might get warm but never blazingly hot. It was operating fine *for how it was designed*. Which was to *briefly* use the HD to transfer music either to sync with the computer or into RAM to play it. It was *not* designed to be constantly used as a Firewire drive. actually, it was. You provide no evidence that backs this claim. Show me some actual design specs or I’m done with you. ipods could be put into firewire disk mode which kept the disk spinning continuously. I know. I did it. It got hot as hell. in fact, apple had planned on ipods being used for portable home folders in panther. however, that feature was dropped for unknown reasons, almost certainly due to issues with syncing (which they still can't get right), not heat. It is a mental error to simply *assume* unknown factors support your claim. Are you also one of those nutters who sees a light in the sky they can’t identify and just *knows* that it must be those aliens from Blixnor looking to get all probe-y? Perhaps they dropped it because the *did* try to do a redesign that caused it to generate less heat, but failed. Perhaps they gave up for the same reason they stopped allowing iDevices to be seen as drives at all. Stop talking like you¹re an authority on all things. You come across like just another nameless idiot when you do that. nothing more than insults. cite facts, if you have any. Fact: you use no identifiable name that can linked to anyone with expertise on these matters. Fact: you have no internal or external documents from Apple or any of the USB manufacturers discussed here regarding their energy usage or heat dissipation. Fact: it’s not an insult to call you out on your BS. a manufacturer is not going to intentionally release a product that runs outside its own design specs. More know-nothing BS talk from you. Companies like Volkswagen will even lie to government regulators about their product’s specifications! a lot of products run hot without any issue, including hard drives, usb sticks and many other things. it's almost always normal. Except when it isn’t. You’ve provided no evidence here that it *is* normal, or that it won’t affect the lifespan of any of the devices in question. Until you do, you need to speak less if you don’t want to look more foolish. i have a few 7200 rpm hard drives that run so hot i can't even touch the drive itself. the enclosure gets *very* warm. Where is your evidence that they’re operating in their acceptable temperature range? And, again, it isn’t just about whether or not they *exceed* that temperature, but what effect operating at higher temperatures can have in general. Things tend to break more when they experience a lot of thermal stress. To claim otherwise makes you seem out of touch with reality. -- "Also . . . I can kill you with my brain." River Tam, Trash, Firefly |
#86
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Is it me or are there many unreliable USB flash drives?
On 10-26-2016 12:34, Doc O'Leary wrote:
caused it to generate less heat, but failed. Perhaps they gave up for the same reason they stopped allowing iDevices to be seen as drives at all. That can still be done. And although it's not as simple as one would like, it's not terribly difficult. |
#87
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Is it me or are there many unreliable USB flash drives?
In message
Doc O'Leary wrote: For your reference, records indicate that nospam wrote: In article , Doc O'Leary wrote: it was defective. hd ipods might get warm but never blazingly hot. It was operating fine *for how it was designed*. Which was to *briefly* use the HD to transfer music either to sync with the computer or into RAM to play it. It was *not* designed to be constantly used as a Firewire drive. actually, it was. You provide no evidence that backs this claim. Show me some actual design specs or I’m done with you. Your poor memory doesn't change the fact that the original Firewire iPod was specifically marketed as being able to boot your Mac, install OS X, and operate as an external hard drive. I did it quite a lot, the iPod was fine for about a decade until I traded it in for a credit on a new iPod Touch. -- Clicked "Debug" button. Program still has bugs. Wtf? - Rich Seigel |
#88
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Is it me or are there many unreliable USB flash drives?
In article , Doc O'Leary
wrote: it was defective. hd ipods might get warm but never blazingly hot. It was operating fine *for how it was designed*. Which was to *briefly* use the HD to transfer music either to sync with the computer or into RAM to play it. It was *not* designed to be constantly used as a Firewire drive. actually, it was. You provide no evidence that backs this claim. you didn't read very far. the evidence was in the post. Show me some actual design specs or Iąm done with you. no loss. ipods could be put into firewire disk mode which kept the disk spinning continuously. I know. I did it. so did i. It got hot as hell. no it didn't. it got warm (as expected for any hard drive), but it did not get hot as hell unless something was *wrong*. in fact, apple had planned on ipods being used for portable home folders in panther. however, that feature was dropped for unknown reasons, almost certainly due to issues with syncing (which they still can't get right), not heat. It is a mental error to simply *assume* unknown factors support your claim. Are you also one of those nutters who sees a light in the sky they canąt identify and just *knows* that it must be those aliens from Blixnor looking to get all probe-y? Perhaps they dropped it because the *did* try to do a redesign that caused it to generate less heat, but failed. Perhaps they gave up for the same reason they stopped allowing iDevices to be seen as drives at all. as i said, the *likely* reason they dropped it was because syncing was problematic, something they still can't get right to this day and with data that's easier to sync than a user's entire home folder. i have a few 7200 rpm hard drives that run so hot i can't even touch the drive itself. the enclosure gets *very* warm. Where is your evidence that theyąre operating in their acceptable temperature range? And, again, it isnąt just about whether or not they *exceed* that temperature, but what effect operating at higher temperatures can have in general. Things tend to break more when they experience a lot of thermal stress. To claim otherwise makes you seem out of touch with reality. the only one who is out of touch is you. google, in their drive testing, found that heat was not a major source of drive failure. in fact, there was a much higher failure rate at *cooler* temperatures, with a small increase at very hot temps. https://tastyresearch.files.wordpress.com/2007/08/drives3.png |
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