jffs2 filesystem not correct

but when i change kernelt for kernel2.6.17 for a test, kernel boot but i got this

jffs2_scan_eraseblock()

....

Cowardly refusing to erase blocks on filesystem with no valid JFFS2 nodes

empty_blocks 26, bad_blocks 0, c->nr_blocks 32

jffs2 as some trouble

what happen 's ? is this kernel 2.6.17 ok with jffs2 ?

futhermore, i try to use TMD utils i get each time

erase or eraseall /dev/mtd0: MTD Erase failure: Input/output error

hwat is wrong ? is this possible reason: If you get this message for each block than probably write protection is on. Check the WP pin

Bests regards

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