두 개의 파티션이 있는 디스크가 있습니다.
# fdisk -l
Disk /dev/mmcblk0: 7381 MB, 7381975040 bytes
4 heads, 16 sectors/track, 225280 cylinders
Units = cylinders of 64 * 512 = 32768 bytes
Device Boot Start End Blocks Id System
/dev/mmcblk0p1 * 33 32800 1048576 83 Linux
/dev/mmcblk0p2 32801 65568 1048576 83 Linux
/dev/mmcblk0p2오버레이 파일 시스템이 저장되는 위치입니다 .
/media/usb/sda1USB 스틱의 두 번째 파티션( )에 ext4 파일을 마운트 해제하고 복사했습니다 .
# umount /overlay/
# dd if=/dev/mmcblk0p2 of=/media/usb/sda1/overlay.img
문서에는 다음이 표시됩니다.
# file overlay.img
overlay.img: Linux rev 1.0 ext4 filesystem data, UUID=79213fb6-180c-474c-ba7b-2567a62a869a (needs journal recovery) (extents) (large files) (huge files)
설치하려고 하면 실패합니다.
# mount -t ext4 -o loop overlay.img mnt
[ 931.883626] EXT4-fs error (device loop0): ext4_map_blocks:591: inode #8: block 131098: comm mount: lblock 26 mapped to illegal pblock 131098 (length 1)
[ 931.921489] jbd2_journal_bmap: journal block not found at offset 26 on loop0-8
[ 931.928718] JBD2: bad block at offset 26
[ 931.932626] JBD2: IO error -5 recovering block 26 in log
[ 931.937968] EXT4-fs error (device loop0): ext4_map_blocks:591: inode #8: block 131099: comm mount: lblock 27 mapped to illegal pblock 131099 (length 1)
[ 931.998314] jbd2_journal_bmap: journal block not found at offset 27 on loop0-8
[ 932.005560] JBD2: bad block at offset 27
[ 932.009484] JBD2: IO error -5 recovering block 27 in log
[ 932.014810] EXT4-fs error (device loop0): ext4_map_blocks:591: inode #8: block 131100: comm mount: lblock 28 mapped to illegal pblock 131100 (length 1)
[ 932.041620] jbd2_journal_bmap: journal block not found at offset 28 on loop0-8
[ 932.048834] JBD2: bad block at offset 28
[ 932.052745] JBD2: IO error -5 recovering block 28 in log
[ 932.058051] EXT4-fs error (device loop0): ext4_map_blocks:591: inode #8: block 131101: comm mount: lblock 29 mapped to illegal pblock 131101 (length 1)
[ 932.082502] jbd2_journal_bmap: journal block not found at offset 29 on loop0-8
[ 932.089716] JBD2: bad block at offset 29
[ 932.093629] JBD2: IO error -5 recovering block 29 in log
[ 932.098937] EXT4-fs error (device loop0): ext4_map_blocks:591: inode #8: block 131102: comm mount: lblock 30 mapped to illegal pblock 131102 (length 1)
[ 932.127150] jbd2_journal_bmap: journal block not found at offset 30 on loop0-8
[ 932.134369] JBD2: bad block at offset 30
[ 933.372932] JBD2: recovery failed
[ 933.376238] EXT4-fs (loop0): error loading journal
mount: mounting /dev/loop0 on mnt failed: Input/output error
mount파일을 변경하십시오 .
# file overlay.img
overlay.img: data
내 장치는 ARM이고 busybox v1.24.1이 있습니다.
그렇다면 전체 파티션을 복사하는 방법은 무엇입니까? 어떻게 마운트하고 파일을 수정합니까? 올바르게 설치하려면 추가로 수행해야 할 작업이 있나요?