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Subject: | Re: [ts-7000] Re: yaffs tragedy: no more eraased blocks |
From: | Gary Wicker <> |
Date: | Wed, 19 Aug 2009 11:09:58 -0700 |
Hi Eddie, We had what appears to be this same issue on 2 of our TS-7250s (I thought it was 3 earlier but now I'm pretty sure it was only on 2 of them). I have not had time to go back and try to restore them in some time, although we did try that same mtdutils modification and a kernel change to ignore the bad block indication, but neither did the trick. Our systems run from a root filesystem in flash, so how ours happened was after an extended period of testing and software updates. They worked for months before anything happened. Eventually the symptom was that we were unable to load a new software image into the board because yaffs had marked too many blocks as bad. At that point we gave up on yaffs and switched to jffs2. It's been a long time since we had this issue so I'm a bit fuzzy on the details. I do know that we used the "mkyaffs" utility to program the flash on the target using an image prepared by the "mkyaffsimage" on the host. As I said, we did lots of programming and reprogramming of the boards with no problems prior to the failures. Once the failures started occurring they were unrecoverable, at least with a software image of the size we needed -- you could still program much smaller images using mkyaffs since there were still some good blocks left. And yes we use a custom kernel and partitioning scheme so perhaps this was just all our fault. I hope this information helps. Gary Wicker qhorus.com On Wed, Aug 19, 2009 at 10:54 AM, Eddie Dawydiuk <m("embeddedarm.com","eddie");">> wrote: Hello, __._,_.___
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