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Velociraptor
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07 Mar 2008, 4:20 pm

USB flash drives are without doubt wonderful little tools. Unfortunately, they have limited lifespans--they can only perform so many write operations before they turn into ROM instead of RAM.

Now, recently it's been taking my flash drive (which I rely heavily upon for school) longer and longer to write. It takes upwards of a minute to save a ~5 MB file. Does this mean that my flash drive is starting to die? Should I replace it?



Fuzzy
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07 Mar 2008, 4:28 pm

Sounds like it.



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09 Mar 2008, 1:56 pm

Be leery. Flash drive cells die. I had a flash drive entirely die whilst transporting data and I almost had a nervous breakdown......Where I live (extreme cold) one cannot leave a flash drive, even for moments, in a cold car, for ex. Be cautious around instrumentation (magnetic), plus temp fluctuations. Yes, back-up your data - just in case.


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wsmac
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09 Mar 2008, 2:20 pm

You people are scaring me! 8O

I recently took my three flash drives and reformatted them all.
I was going to re-organize the information I had on all three so I pulled everything off them.
Then I went and checked each one out and my computer said they all were over 3/4 full.
I just went and reformatted them (I always reformat my new drives since I don't want all that extra stuff the seller puts on them).

I do try to backup everything.
Luckily at the computer labs at school, they allow that students to keep backup files of our work, for the semester.
I also try to keep a backup on my laptop of everything I am working on, as well as in the external hard drive I have at home as my major backup source.

I'm pretty ignorant about flash drives... I had no idea the cold up there in Fairbanks would affect a flash drive... thanks for the info! :wink:


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digger1
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09 Mar 2008, 3:15 pm

could be the USB drive too. If you want to, go out and get another USB card and see if that doesn't solve it.

Also, know that jump drives have stuff on them nearly permanently so if you have a 1 GB one and put on 500 MB, you'll be mostly full even though you put on half it's capacity.



Fuzzy
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09 Mar 2008, 4:46 pm

wsmac wrote:
You people are scaring me! 8O

I recently took my three flash drives and reformatted them all.
I was going to re-organize the information I had on all three so I pulled everything off them.
Then I went and checked each one out and my computer said they all were over 3/4 full.
I just went and reformatted them (I always reformat my new drives since I don't want all that extra stuff the seller puts on them).

I do try to backup everything.
Luckily at the computer labs at school, they allow that students to keep backup files of our work, for the semester.
I also try to keep a backup on my laptop of everything I am working on, as well as in the external hard drive I have at home as my major backup source.

I'm pretty ignorant about flash drives... I had no idea the cold up there in Fairbanks would affect a flash drive... thanks for the info! :wink:


Every time you format it you write to every byte of data, hastening and shortening the life of the flash drive. Avoid formating!

Secondly, if you change the format type, like from fat/fat16 to fat32, you will change the number of sectors, giving an apparent size change.

However, this causes the computer to make disk writes that are larger. if you wrote a short note and saved it to disk it will round off the size. It doesnt write individual bytes. This again shortens the life span of the chip(but its faster too).

The only benefit of fat32 over fat16 is that it can address drives larger than 4 gigabytes. Since most of the flash drives are smaller than that, it makes sense to use fat16.



Psychlone
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09 Mar 2008, 5:15 pm

They are cheap, so why not get another one just to be safe? Personally, I think using SD cards are better than USB sticks.



LostInEmulation
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09 Mar 2008, 6:23 pm

Of course it could be that the USB drive is just heavily fragmented instead of on the way out...


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lau
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09 Mar 2008, 7:46 pm

Flash memory can be rewritten a huge number of times before it fails. Formatting a stick doesn't rewrite it all.

=============

If you have a 1Gbyte stick, there is 1GByte of space on it.

With Windows, you are only allowed a single FAT partition (I don't think it even accepts NTFS). So, if you have lots of small files, they invariably occupy a whole cluster each.

A 1Gbyte FAT16 partition can only allocate clusters that are 16Kbytes each.

Indeed, because it is FAT16, it can only have at most 65,535 files.

I.e. 65,535 files, each of one byte, will fill a 1Gbyte stick (FAT16).

===============

The only dead stick I've ever seen, I opened up, to discover that two surface mount resistors had dropped off (and out of the package). Bad manufacture/assembly, in other words.


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Last edited by lau on 13 Mar 2008, 6:31 am, edited 1 time in total.

seaweasel
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12 Mar 2008, 7:52 pm

avoid journalling filesystems on them to as the filesystems usally write to them after metadata changes which happens all the time.
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JFS,reiserfs,XFS,reiser4,HFS+,ext3,ext4, and NTFS



Fuzzy
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12 Mar 2008, 11:51 pm

Thanks for properly informing me lau. I'll remember that.



wsmac
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13 Mar 2008, 9:15 pm

Thanks to this thread... everytime I use my iPod... I see it dwindling away to some useless fragment of the pop culture of the 2000's :(


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