fat32

问题 How can I read a sector of a hard disk drive, access the file system and block or cluster of a file, list of bad blocks (FAT) or cluster file (NTFS)? Or access the list of free blocks (FAT) or cluster bitmap (NTFS)? 回答1: You can use the CreateFile API to open a physical disk by specifying a special file name (e.g. "\\.\PhysicalDrive0" ) -- see the section "Physical Disks and Volumes" in the CreateFile MSDN documentation. Be very careful though, especially with write operations -- you can

问题 I'm currently trying to code a FAT system in C on a Xillinx Kintex 7 card. It is equipped with a MicroBlaze and I've already managed to create most of the required functions. The problem I'm facing is about the total capacity of a folder, I've read on the web that in FAT32 a folder should be able to contain more than 65 000 files but with the system I've put in place I'm limited to 509 files per folder. I think it's because of my comprehension of the way FAT32 works but here's what I've made

问题 I need to write a script that sets the short name of a file on a FAT32 file system. On NTFS I can use the FSUTIL utility under windows but I cannot seem to fathom out how to do this for a FAT32 drive. Bonus kudos for a window command or powershell script 回答1: They made this superhard to get at, but here is one solution: http://technet.microsoft.com/en-us/library/ee692751.aspx 来源： https://stackoverflow.com/questions/4115519/how-to-set-fat32-short-names-in-powershell-or-windows-command-shell

问题 In C-language, what are the most appropriate format specifiers for data type BYTE, WORD and DWORD to be used with printf and scanf functions? I am having a hard time displaying BPB field's values over console. For example, if I am trying to display BPB_BytsPerSec using "%lu", I am getting unusual figures.. printf("Bytes per Sector: %lu", b->BPB_BytsPerSec); I am getting a value of "514", which I believe, is wrong interpretation.. Please suggest the way out. Thanks. (I am using gcc 5.1 via

问题 I have a Java application installed on a USB which the user should be able to run from any OS. For this, I'm packaging a JRE instance on the USB along with my application. I'm having a FAT32 file-system on the USB. However, the problem is, FAT32 has no concept of execute ("+x") permissions. While I can launch a shell script, like so: $ sh /path/to/fat32-usb/helloWorld.sh , and while I can launch a simple ELF binary, like so: $ /lib64/ld-linux-x86-64.so.2 /path/to/fat32-usb/helloWorld , I can

问题 I'm trying to read the boot sector from a FAT32 drive on Android device, but I'm getting totally different data from what I expect. This is the output I'm receiving with bulkTransfer on read endpoint on my Android device. 33C08ED0BC007C8EC08ED8BE007CBF00 06B90002FCF3A450681C06CBFBB90400 BDBE07807E00007C0B0F850E0183C510 ... 656D000000637B9A5BE2B3D70000800F 30000BFEFFF4E0030000205CF8000000 00000000000000000000000000000000 00000000000000000000000000000000 000000000000000000000000000055AA This is

问题 When I plug a USB stick/thumbdrive that has been formatted as FAT32 into a Raspberry Pi (running Raspbian) the file permissions default to 644 and I cannot change them. I need to leave the stick as FAT32 so it can be used back and forward to a Windows system. I have written a rule using udev but I can't get it to work. My udev rule looks like this: # Set up any USB stick for full write access KERNEL=="sd?1", MODE="0777" I determined that the rule is getting triggered because I had it renaming

问题 Im trying to convert a time structure to a FAT timestamp. My code looks like: unsigned long Fat(tm_struct pTime) { unsigned long FatTime = 0; FatTime |= (pTime.seconds / 2) >> 1; FatTime |= (pTime.minutes) << 5; FatTime |= (pTime.hours) << 11; FatTime |= (pTime.days) << 16; FatTime |= (pTime.months) << 21; FatTime |= (pTime.years + 20) << 25; return FatTime; } Does someone have the correct code? 回答1: The DOS date/time format is a bitmask: 24 16 8 0 +-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+ +-+-+-+-

问题 I work on a Mercurial repository that is checked out onto an Unix filesystem such as ext3 on some machines, and FAT32 on others. In Subversion, I can set the svn:executable property to control whether a file should be marked executable when checked out on a platform that supports such a bit. I can do this regardless of the platform I'm running SVN on or the filesystem containing my working copy. In Mercurial, I can chmod +x to get the same effect if the clone is on a Unix filesystem. But how

问题 I know FAT32, as well as FAT16/12 neither support symbolic links nor hard-links . However I came up with this idea: The FAT specification describes that every file is associated with a directory-entry. In my understanding, one could say that a file-entry in a directory somehow or other points to the file's content. So, how can I define two directory-entries which point to the same file-content? Or, what could prevent me from doing so? Use case: I have a USB mass storage device for my car