On Thu, 24 Oct 2002 00:42:50 -0400, Christopher Bergeron wrote:
All other indications of CompactFlash are that it's a realiable medium (unless you can document otherwise). I will provide documentation to
Well I don't know that I can "document" but I've had numerious problems with CF devices. I've got 5 seperate CFs with Sector 0 CRC problems. 3 of them are SanDisk but I also have 2 from SST. They are various sizes.
This topic has come up on the Linux-embedded list as well. Others have experienced the same type of issues we have.
I've spoken with an app engineer at SanDisk and his explaniation was under certian conditions, like say if your 5V power glitches. The internal write state machine gets confused/reset or whatever and it ends up munging sector 0. After which the CF won't work in any OS (including Linux) because it throws and error reading the partition table.
The SanDisk guy told me I sould be able to recover sector 0 by writing all zeros to it which will reset the crc but I haven't been able to find an application that is 1) Freeware and 2) Will do raw sector writes.
-- Richard A. Smith Bitworks, Inc. rsmith@bitworks.com 479.846.5777 x104 Sr. Design Engineer http://www.bitworks.com