On Tue, 2004-11-02 at 22:39 +0100, Goran Obradovic wrote: > I had huge production problems with CF cards just a month ago. I used to > live in Canada and still have some business there - electronic voting > equipment. So, we have optical voting devices with 256, 512, and 1GB CF > cards for election definitions and voting records. Last month on Alberta > elections we had 5 Kingston 256MB cards failing during the elections. That > was a nightmare. It is interesting that 512 and 1GB cards were ok even with > more writes. In any case, if you do something like this first test some > cards for long period of time. Make some script that will constantly write > and read the card and see when they fail. > Goran
Reads are non destructive, writes produce wear and eventually blocks start to fail. the 256meg modules you mention above where probably older and used a different technology. Not to mention all flash memory runs in a round robin writing fashion, so each block should hopefully get equal usage. The smaller cards just happen to make the round trip faster than the larger cards. Use of a decent OS and filesystem should help detect and avoid bad blocks, but you eventually will end with failure just like any other media. -- Steven Critchfield <[EMAIL PROTECTED]> _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
