MP3 player questions
After yet another visit to a client using a CD player for music on hold, I
wondered about replacing the thing with an MP3 player. Any thoughts? Are they reliable enough to see out a year or two of 8 hours/5 days a week operation? Trevor Wilson |
MP3 player questions
If it uses flash memory, there are no moving parts -- it should last many
years. |
MP3 player questions
"William Sommerwerck" wrote in message ... If it uses flash memory, there are no moving parts -- it should last many years. **Nope. Flash memory has a life-span. I am wondering if this needs to be taken into account. Trevor Wilson |
MP3 player questions
On Sun, 10 Feb 2008 11:42:56 +1100, Trevor Wilson wrote:
"William Sommerwerck" wrote in message ... If it uses flash memory, there are no moving parts -- it should last many years. **Nope. Flash memory has a life-span. **Nope - for the most part. Flash memory has a _memory write_ life-span. I'm sure it can be read over and over again until you smash it with a hammer after hearing that !$$##)@{@@}@^$ song onemore time. :-) Jonesy -- Marvin L Jones | jonz | W3DHJ | linux 38.24N 104.55W | @ config.com | Jonesy | OS/2 *** Killfiling google posts: http://jonz.net/ng.htm |
MP3 player questions
If it uses flash memory, there are no moving parts -- it should last many
years. **Nope. Flash memory has a life-span. I am wondering if this needs to be taken into account. The limited lifespan of flash is associated with the erase/write cycles, which use a high voltage to tunnel electrons through an insulating oxide barrier. The high voltage gradually degrades the oxide, limiting the number of erase/write cycles per block. The number of such erasures varies with the flash type, but is usually in the hundreds-of-thousands range (Samsung says it's up to a million cycles, if wear levelling and ECC are used). There seems to be a storage lifetime, once the data is programmed... it's usually quoted as something on the order of 10 to 20 years, if I recall correctly. I haven't seen any reports, or anything in the data sheets which would indicate that the number of *read* cycles for a given flash-memory block has any effect at all on the storage lifetime or the number of erase/write cycles you can use. Reading doesn't involve modifying the stored charge at all... it just senses it via a FET. Unless you're planning to download a whole new batch of music to the flash music-on-old player ever few hours, I doubt that you'll be able to wear out such a device within less than a lotta years. It should certainly survive well past the lifetime of a typical CD player! -- Dave Platt AE6EO Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
MP3 player questions
"Allodoxaphobia" wrote in message ... On Sun, 10 Feb 2008 11:42:56 +1100, Trevor Wilson wrote: "William Sommerwerck" wrote in message ... If it uses flash memory, there are no moving parts -- it should last many years. **Nope. Flash memory has a life-span. **Nope - for the most part. Flash memory has a _memory write_ life-span. I'm sure it can be read over and over again until you smash it with a hammer after hearing that !$$##)@{@@}@^$ song onemore time. :-) **Thanks for the info. It looks like they will do the job just fine. Trevor Wilson |
MP3 player questions
"Dave Platt" wrote in message ... If it uses flash memory, there are no moving parts -- it should last many years. **Nope. Flash memory has a life-span. I am wondering if this needs to be taken into account. The limited lifespan of flash is associated with the erase/write cycles, which use a high voltage to tunnel electrons through an insulating oxide barrier. The high voltage gradually degrades the oxide, limiting the number of erase/write cycles per block. The number of such erasures varies with the flash type, but is usually in the hundreds-of-thousands range (Samsung says it's up to a million cycles, if wear levelling and ECC are used). There seems to be a storage lifetime, once the data is programmed... it's usually quoted as something on the order of 10 to 20 years, if I recall correctly. I haven't seen any reports, or anything in the data sheets which would indicate that the number of *read* cycles for a given flash-memory block has any effect at all on the storage lifetime or the number of erase/write cycles you can use. Reading doesn't involve modifying the stored charge at all... it just senses it via a FET. Unless you're planning to download a whole new batch of music to the flash music-on-old player ever few hours, I doubt that you'll be able to wear out such a device within less than a lotta years. It should certainly survive well past the lifetime of a typical CD player! **Thanks for the info. It looks like they will do the job just fine. Trevor Wilson |
MP3 player questions
"Trevor Wilson" wrote in message
... "William Sommerwerck" wrote in message ... If it uses flash memory, there are no moving parts -- it should last many years. **Nope. Flash memory has a life-span. I am wondering if this needs to be taken into account. Only for rewriting. Do you expect to be altering the flash drive all the time, every day? |
MP3 player questions
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