實驗紀錄: 用 Linux mount FAT 格式的 .dmg
剛剛無聊在試 OS X 的 Disk Image
生了一個 dmg, format 成 FAT(MSDOS) 格式
結果拿到 Linux 下 mount，好像不是 mount -t msdos -o loop xxx.dmg 那麼簡單
直接噴出 error;
mount: wrong fs type, bad option, bad superblock on /dev/loop0
於是抓出兩個 disk image 來比對一下
可以 mount 的 (用 losetup 掛一個空檔案去 mkfs.msdos);
00000000 eb 3c 90 6d 6b 64 6f 73 66 73 00 00 02 04 01 00 |.<.mkdosfs......|
00000010 02 00 02 10 27 f8 08 00 20 00 40 00 00 00 00 00 |....'... .@.....|
00000020 00 00 00 00 00 00 29 42 a2 93 45 20 20 20 20 20 |......)B..E |
00000030 20 20 20 20 20 20 46 41 54 31 32 20 20 20 0e 1f | FAT12 ..|
不給掛的 .dmg:
00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
000001b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 |................|
000001c0 01 00 0b fe ff ff 3f 00 00 00 bc 4f 00 00 00 00 |......?....O....|
000001d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
000001f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
00000200 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00007e00 eb 3c 90 42 53 44 20 20 34 2e 34 00 02 02 01 00 |.<.BSD 4.4.....|
00007e10 02 00 02 bc 4f f0 28 00 20 00 10 00 00 00 00 00 |....O.(. .......|
00007e20 00 00 00 00 00 00 29 f8 19 d7 b7 55 4e 54 49 54 |......)....UNTIT|
00007e30 4c 45 44 20 20 20 46 41 54 31 36 20 20 20 fa 31 |LED FAT16 .1|
前面多了一牛車好像是 partition 的 info，不像另一個的 FAT boot record 在開頭，在 0x7e00 才開始
所以做個 32256 bytes (0x7e00) 的 offset 就好了
losetup --offset 32256 /dev/loop0 kaka.dmg
mount -t vfat /dev/loop0 /mnt
done，還真無聊
由 cclien 發表於 December 28, 2006 06:57 PM