Off-topic: Muito cuidado...
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Discos e Cd's
Por acaso tenho CD's gravados a partir de 96 (e mais a marca não inspira confiança nenhuma, KAO), nunca tive qualquer problema, ainda no outro dia comprovei o bom estado dos bits e bytes.
Sobre os discos chegou-me ás mãos no ano passado um disco de 200 Mb que já tinha sido meu, vendi-o, não sei que tratos teve mas veio-me ter novamente ás mãos; é para aí de 93 ou 94 e deve ter sido um bom ano para os discos, visto que não tem qualquer bad sector...
Sobre os discos chegou-me ás mãos no ano passado um disco de 200 Mb que já tinha sido meu, vendi-o, não sei que tratos teve mas veio-me ter novamente ás mãos; é para aí de 93 ou 94 e deve ter sido um bom ano para os discos, visto que não tem qualquer bad sector...
lol.. tenho cds ha tanto tempo k nao se estragaram e ainda funcionam bem.. desde 98 e alguns de frakissima qualidade..
pelo contrario tenho um Sim City 3000, k de tanto jogar e gra(cof coff), na altura, ate a parte de cima comecou a sair.. lol.. e supostamente um disco de boa qualidade, da TDK td XPTO..
pelo contrario tenho um Sim City 3000, k de tanto jogar e gra(cof coff), na altura, ate a parte de cima comecou a sair.. lol.. e supostamente um disco de boa qualidade, da TDK td XPTO..
- Mensagens: 418
- Registado: 1/2/2005 19:30
Zimix, nõ, provavelmente está apenas a fazer o paralelo da tecnologia analógica para a tecnologia digital, não sabendo que esse paralelo não existe.
"Nem tudo o que pode ser contado conta, e nem tudo o que conta pode ser contado.", Albert Einstein
Incognitus, www.******.com
Incognitus, www.******.com
- Mensagens: 3255
- Registado: 6/11/2002 19:27
Re: ...
EnglishMan Escreveu:Sim, é importante... mas penso que essa alternativa irá diminuir a qualidade dos nossos ficheiros, também, o que não é muito agradável... as nossas fotos ficarão, sempre, com menos qualidade do que no início... gravação após gravação.![]()
EMan.
Incognitus, o EMan só pode estar a brincar!!!
(Estás, não estás?!)
Zimix
English, nota-se que não dominas a tecnologia digital.
A menos que os dados originais JÁ se tenham degradado (caso em que possivelmente já nem conseguirias ler os ficheiros), os ficheiros não perdem qualidade NENHUMA.
A menos que os dados originais JÁ se tenham degradado (caso em que possivelmente já nem conseguirias ler os ficheiros), os ficheiros não perdem qualidade NENHUMA.
"Nem tudo o que pode ser contado conta, e nem tudo o que conta pode ser contado.", Albert Einstein
Incognitus, www.******.com
Incognitus, www.******.com
- Mensagens: 3255
- Registado: 6/11/2002 19:27
...
Sim, é importante... mas penso que essa alternativa irá diminuir a qualidade dos nossos ficheiros, também, o que não é muito agradável... as nossas fotos ficarão, sempre, com menos qualidade do que no início... gravação após gravação.
EMan.
EMan.
_________________________________
Bons negócios. EnglishMan
Bons negócios. EnglishMan
O melhor será ir fazendo backups para CD's novos de tempo em tempo... (até ser lançado um que dure 100 anos...
)...
JCS
JCS
---Tudo o que for por mim escrito expressa apenas a minha opinião pessoal e não é uma recomendação de investimento de qualquer tipo---
https://twitter.com/JCSTrendTrading
"We can confidently predict yesterdays price. Everything else is unknown."
"Every trade is a test"
"Price is the aggregation of everyone's expectations"
"I don't define a good trade as a trade that makes money. I define a good trade as a trade where I did the right thing". (Trend Follower Kevin Bruce, $5000 to $100.000.000 in 25 years).
https://twitter.com/JCSTrendTrading
"We can confidently predict yesterdays price. Everything else is unknown."
"Every trade is a test"
"Price is the aggregation of everyone's expectations"
"I don't define a good trade as a trade that makes money. I define a good trade as a trade where I did the right thing". (Trend Follower Kevin Bruce, $5000 to $100.000.000 in 25 years).
Off-topic: Muito cuidado...
... com as vossas músicas... e fotos, videos, principalmente...
Eu também vou fazer o mesmo, mas este senhor deve ter uma loja (ou mais) de revelação de fotografias
Do Burned CDs Have a Short Life Span?
Optical discs may not be your best bet for storing digital media long term, expert says.
John Blau, IDG News Service
Tuesday, January 10, 2006
Opinions vary on how to preserve data on digital storage media, such as optical CDs and DVDs. Kurt Gerecke, a physicist and storage expert at IBM Deutschland, has his own view: If you want to avoid having to burn new CDs every few years, use magnetic tapes to store all your pictures, videos and songs for a lifetime.
"Unlike pressed original CDs, burned CDs have a relatively short life span of between two to five years, depending on the quality of the CD," Gerecke says. "There are a few things you can do to extend the life of a burned CD, like keeping the disc in a cool, dark space, but not a whole lot more."
The problem is material degradation. Optical discs commonly used for burning, such as CD-R and CD-RW, have a recording surface consisting of a layer of dye that can be modified by heat to store data. The degradation process can result in the data "shifting" on the surface and thus becoming unreadable to the laser beam.
"Many of the cheap burnable CDs available at discount stores have a life span of around two years," Gerecke says. "Some of the better-quality discs offer a longer life span, of a maximum of five years."
Distinguishing high-quality burnable CDs from low-quality discs is difficult, he says, because few vendors use life span as a selling point.
Similar Limitations
Hard-drive disks also have their limitations, according to Gerecke. The problem with hard drives, he says, is not so much the disk itself as it is the disk bearing, which has a positioning function similar to a ball bearing. "If the hard drive uses an inexpensive disk bearing, that bearing will wear out faster than a more expensive one," he says. His recommendation: a hard-drive disk with 7200 revolutions per minute.
To overcome the preservation limitations of burnable CDs, Gerecke suggests using magnetic tapes, which, he claims, can have a life span of 30 years to 100 years, depending on their quality. "Even if magnetic tapes are also subject to degradation, they're still the superior storage media," he says.
But he's quick to point out that no storage medium lasts forever and, consequently, consumers and business alike need to have a migration plan to new storage technologies.
"Companies, in particular, need to be constantly looking at new storage technologies and have an archiving strategy that allows them to automatically migrate to new technologies," he says. "Otherwise, they're going to wind up in a dead-end. And for those sitting on terabytes of crucial data, that could be a colossal problem."
Abraços.
EnglishMan
Do Burned CDs Have a Short Life Span?
Optical discs may not be your best bet for storing digital media long term, expert says.
John Blau, IDG News Service
Tuesday, January 10, 2006
Opinions vary on how to preserve data on digital storage media, such as optical CDs and DVDs. Kurt Gerecke, a physicist and storage expert at IBM Deutschland, has his own view: If you want to avoid having to burn new CDs every few years, use magnetic tapes to store all your pictures, videos and songs for a lifetime.
"Unlike pressed original CDs, burned CDs have a relatively short life span of between two to five years, depending on the quality of the CD," Gerecke says. "There are a few things you can do to extend the life of a burned CD, like keeping the disc in a cool, dark space, but not a whole lot more."
The problem is material degradation. Optical discs commonly used for burning, such as CD-R and CD-RW, have a recording surface consisting of a layer of dye that can be modified by heat to store data. The degradation process can result in the data "shifting" on the surface and thus becoming unreadable to the laser beam.
"Many of the cheap burnable CDs available at discount stores have a life span of around two years," Gerecke says. "Some of the better-quality discs offer a longer life span, of a maximum of five years."
Distinguishing high-quality burnable CDs from low-quality discs is difficult, he says, because few vendors use life span as a selling point.
Similar Limitations
Hard-drive disks also have their limitations, according to Gerecke. The problem with hard drives, he says, is not so much the disk itself as it is the disk bearing, which has a positioning function similar to a ball bearing. "If the hard drive uses an inexpensive disk bearing, that bearing will wear out faster than a more expensive one," he says. His recommendation: a hard-drive disk with 7200 revolutions per minute.
To overcome the preservation limitations of burnable CDs, Gerecke suggests using magnetic tapes, which, he claims, can have a life span of 30 years to 100 years, depending on their quality. "Even if magnetic tapes are also subject to degradation, they're still the superior storage media," he says.
But he's quick to point out that no storage medium lasts forever and, consequently, consumers and business alike need to have a migration plan to new storage technologies.
"Companies, in particular, need to be constantly looking at new storage technologies and have an archiving strategy that allows them to automatically migrate to new technologies," he says. "Otherwise, they're going to wind up in a dead-end. And for those sitting on terabytes of crucial data, that could be a colossal problem."
Abraços.
EnglishMan
_________________________________
Bons negócios. EnglishMan
Bons negócios. EnglishMan
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