当我运行此命令时sudo dosfsck -w -r -l -a -v -t /dev/sdb出现以下错误：
fsck.fat 4.1 (2017-01-24)
Checking we can access the last sector of the filesystem
0x41: Dirty bit is set. Fs was not properly unmounted and some data may be corrupt.
Automatically removing dirty bit.
Boot sector contents:
System ID "mkfs.fat"
Media byte 0xf8 (hard disk)
512 bytes per logical sector
8192 bytes per cluster
32 reserved sectors
First FAT starts at byte 16384 (sector 32)
2 FATs, 32 bit entries
7569408 bytes per FAT (= 14784 sectors)
Root directory start at cluster 2 (arbitrary size)
Data area starts at byte 15155200 (sector 29600)
1890310 data clusters (15485419520 bytes)
32 sectors/track, 64 heads
0 hidden sectors
30274560 sectors total
Both FATs appear to be corrupt. Giving up.
这里有任何帮助/建议吗！