--- device/nandflash/nandflash_smallblock.c	2009-01-21 21:16:59.000000000 +0100
+++ nandflash_smallblock.c	2009-01-21 21:17:13.000000000 +0100
@@ -516,7 +516,7 @@
 #endif
 	nf->writebuffer=(u8*)malloc(dev->pagedumpsize);
 	//nf->memsize=528*32*4096;
-       if ((nf->fdump= open(dev->dump, FILE_FLAG)) < 0)
+       if ((nf->fdump= open(dev->dump, FILE_FLAG | O_TRUNC | O_CREAT, S_IRUSR | S_IWUSR)) < 0)
        {
        	free(nf);
        	printf("error open nandflash dump!\n");