Found this in the logs

I flashed Shibby 122 on my r7000. in reviewing the logs I found this:


Dec 31 19:01:26 ARMtomato kern.info kernel: Scanning device for bad blocks
Dec 31 19:01:26 ARMtomato kern.warn kernel: Bad eraseblock 801 at 0x000006420000
Dec 31 19:01:26 ARMtomato kern.warn kernel: Bad eraseblock 952 at 0x000007700000

Anyone have any ideas on this?