it didn't work and gave me an error message, i guess there is a problem in flash memory
[root@dvrdvs /] # dd if=/dev/zero of=/dev/mtdblock0 bs=64k count=1
1+0 records in
1+0 records out
65536 bytes (64.0KB) copied, 0.016158 seconds, 3.9MB/s
[root@dvrdvs /] # flash mtdblock0 maybe unormal
write...