Database of currupted sd cards.

[smopoim86]

Due to the amount of cards dieing. I want to start a database of dead cards to see if there are any patterns. I would like to have: Brand, Capacity, and where it was made. (if you can think of any other important info, I'll add that as well)

Just post the info and I will keep the original post up to date with a list of failed cards.

http://img444.imageshack.us/img444/3836/snap1ec0.jpg

[TheChampJT]

Huh? I've been using the same 8GB MicroSD card, SanDisk, for a few months now. Always works the way it should, and I've reformatted almost as many times as I have hard reset, which is a bunch.

[smopoim86]

If you read through the android thread, there are a bunch of people who have had cards quit working. I'm wanting to see if it's a problem with cheap cards or if it is something else. I'm willing to bet it's just cheap cards that do not perform write leveling.

[pchasco]

Sandisk 4GB, speed rating 2.

[bugzy]

Transcend 2GB

never failed yet .. still running happy, even with dzo's Android port

[thirteenthcell]

Transcend 4GB SDHC assembled in Taiwan.

2 months of normal use, and now corrupt. Returning for a different card

Transcend 2GB

never failed yet .. still running happy, even with dzo's Android port

This thread is clearly for cards that DO NOT work. Who's to say your card fails 4 months from now.

[bugzy]

Transcend 4GB SDHC assembled in Taiwan.

2 months of normal use, and now corrupt. Returning for a different card



This thread is clearly for cards that DO NOT work. Who's to say your card fails 4 months from now.
I think its also important to know cards that are working as well.

Mine's probably not a SDHC, which maybe why it seems to work so far.

Ive been using Android for 3-4 months without issue on my SD card

[ssdarius]

That's my conclusion well partly, I've been trough many sd cards and brands mine's and my friend's (they always come to me when something goes wrong)
after using many cards from the same manufacturer I had one or the other fail for no apparent reason,always make sure never to pull a card out while it's doing some operation, never write the card to full capacity either,there's nothing said on that , but just to be safe,still they keep failing. one thing I've notice is that this is happening more frequently lately more often specially on the vouge phone with wm6,and of course the bigger capacity cards.

[smopoim86]

I have to agree on the poor manufactoring. I have seen a huge increase in dead flash memory products recently. (3 or 4 friends with flash drives and one with an sd card)

I have noticed a difference in where they are made though. The Japanese cards seem to be of higher quality. That's one of the reason I wanted to keep up with where they are made. None of the flash drives i've seen dead have been made in japan.

The poor quality will eventually catch up with them.

[thirteenthcell]

...always make sure never to pull a card out while it's doing some operation...

I think you're 100% on the money. It's hard to reproduce card corruption as it seems very random as far as the damage done, and frequency.

Most PDA users (myself included) load up an SD card with 3rd party software as apposed to internal storage which is somewhat limited in size. This leaves plenty of room for Program Memory and less hangups.

It only makes sense that piling software on the SD card will cause an increase in simultaneous reading / writing over a period of time. Removing an SD card while the PDA is running / or even idling could easily cause a corrupted card, depending on whether a piece of software was randomly accessing data on that card at the moment of removal.

Now what can be done to eliminate this problem?

We need to develop a simple "switch" to isolate the SD slot from communication while removing or swapping a card. Microsoft realized this issue with SD cards and developed a "Safely Remove Hardware" wizard from your desktop PC. I've never had problems with SD cards / flash sticks once I religiously used this wizard to and from my PC.

Could someone development savvy write this code for PDA's, since Microsoft didn't feel the need to incorporate this functionality onto their Windows Mobile environments. I wouldn't know where to start lol.

Anyone agree?