Embedded industrial control system, ATOM CPU, 32 gb SSD, VxWorks7 system, UEFI guidance, content of hard disk can normal via FTP access, in the case of RTP, all closed, electricity, under the computer equipment system for (some computer can start), under WinPE HDTune scans the hard drive, has a bad block, but can be by formatting repair, should be the legendary logic bad block, appear in multiple computers similar problems, bad place is different also, have a plenty of application software is broken, also has a configuration file is broken, also have the kernel is broken,,, is a read-only file, FAT32 file system, your great god had a similar experience, or have any information on logical bad block, a user program there is no do write access to these broken file, it was strange, only appear in the device, FTP pressure test in the laboratory, power pressure test hundreds of times are not bad, loaded on the equipment damage rate is very high, also want to ask is, FAT32 file system allocation unit on VxWorks what size do you have any requirements,