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error on remount of a jffs2 filesystem

DISCUSSION Andrew Dixon 1 participant 1 message Feb 21, 2002 Memory technology devices (MTD)

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Hey everyone -

I was wondering if someone could shed some light on a problem that I've been having. I'm using two Intel Strataflash chips as both a boot rom and a permanent backing store. I've hacked some of the mtd drivers so that I now have the two chips recognized as one device and a partition on that device that I want to mount as a jffs2. This all works great. I can mount the device, write to it, read from it, all that good stuff. The problems comes when I try to unmount and then remount the device. I get the following:

jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x01f60004:
0x0080 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x01f60008:
0x0080 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x01f6000c:
0x0080 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x01f60010:
0x0080 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x01f60014:
0x0080 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x01f60018:
0x0080 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x01f6001c:
0x0080 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x01f60020:
0x0080 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x01f60024:
0x0080 instead

This is repeated over and over again and then the device is mounted but it's been erased. If, however, I power off the board I can mount the partition just fine and all of my data is still there. I believe that the problem is that the chip is not in the FL_READY state after it is unmounted, but on a power cycle it gets set up again.

Any ideas on how I might fix this. I've been hacking on cfi_cmdset_0001.c with little success.

thanks,
Andy

P.S. I'm using the mtd stuff from the Linux 2.4.16 kernel.

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Andrew Dixon
Software Engineer
Seranoa Networks
978.897.3434 x231