折腾：
【已解决】Mac中无法识别exFAT的外接移动硬盘
期间，去试试fsck_exfat，结果出错：
➜ ~ sudo fsck_exfat -d disk2s2 Password: Opening /dev/rdisk2s2 fsck_exfat: Can't open /dev/rdisk2s2: Resource busy
fsck_exfat Can’t open Resource busy
➜ ~ diskutil info /dev/disk2s2 Device Identifier: disk2s2 Device Node: /dev/disk2s2 Whole: No Part of Whole: disk2 Volume Name: 内容备份2 Mounted: No Partition Type: Microsoft Basic Data File System Personality: ExFAT Type (Bundle): exfat Name (User Visible): ExFAT OS Can Be Installed: No Media Type: Generic Protocol: USB SMART Status: Not Supported Volume UUID: 756A5BF4-881A-3D0A-8384-13EB4A3EEC22 Disk / Partition UUID: A7D34A12-9ABE-4683-B315-270416FE215F Partition Offset: 209735680 Bytes (409640 512-Byte-Device-Blocks) Disk Size: 4.0 TB (4000576417792 Bytes) (exactly 7813625816 512-Byte-Units) Device Block Size: 512 Bytes Volume Total Space: 0 B (0 Bytes) (exactly 0 512-Byte-Units) Volume Free Space: 0 B (0 Bytes) (exactly 0 512-Byte-Units) Read-Only Media: No Read-Only Volume: Not applicable (not mounted) Device Location: External Removable Media: Fixed
是可以识别的啊
难道是 磁盘工具 读写造成了 此移动硬盘 的 busy？
那把 磁盘工具去掉试试，然后强制重新拔插移动硬盘，再去试试fsck_exfat
没反应。
拔了算了。
然后问题依旧：
➜ ~ sudo fsck_exfat -d disk2s2 Password: Sorry, try again. Password: Opening /dev/rdisk2s2 fsck_exfat: Can't open /dev/rdisk2s2: Resource busy ➜ ~ sudo fsck_exfat -d disk2s2 fsck_exfat: Can't open /dev/rdisk2s2: No such file or directory Opening /dev/rdisk2s2 ➜ ~ sudo fsck_exfat -d disk2s2 fsck_exfat: Can't open /dev/rdisk2s2: Resource busy Opening /dev/rdisk2s2 ➜ ~ sudo fsck_exfat -d disk2s2 Opening /dev/rdisk2s2 fsck_exfat: Can't open /dev/rdisk2s2: Resource busy
从
diskutil info /dev/disk2s2
输出的：
Read-Only Volume: Not applicable (not mounted)
去试试用 磁盘工具 装载
点了 装载 没反应
参考：
去：
➜ ~ sudo fsck_exfat -d /dev/disk2s2 fsck_exfat: Can't open /dev/rdisk2s2: Resource busy
问题依旧。
➜ ~ diskutil repairVolume /dev/disk2s2 Started file system repair on disk2s2 内容备份2 Repairing file system Volume is already unmounted Performing fsck_exfat -y -x /dev/rdisk2s2 File system check exit code is 1 Restoring the original state found as unmounted Error: -69845: File system verify or repair failed Underlying error: 1: Operation not permitted
然后：
➜ ~ diskutil repairDisk disk2 Repairing the partition map might erase disk2s1, proceed? (y/N) N Repair canceled
怕数据被擦除了，所以放弃。
参考：
去：
➜ ~ diskutil list /dev/disk0 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *500.3 GB disk0 1: EFI EFI 209.7 MB disk0s1 2: Apple_APFS Container disk1 500.1 GB disk0s2 /dev/disk1 (synthesized): #: TYPE NAME SIZE IDENTIFIER 0: APFS Container Scheme - +500.1 GB disk1 Physical Store disk0s2 1: APFS Volume Macintosh HD 412.6 GB disk1s1 2: APFS Volume Preboot 21.9 MB disk1s2 3: APFS Volume Recovery 519.0 MB disk1s3 4: APFS Volume VM 9.7 GB disk1s4 /dev/disk2 (external, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *4.0 TB disk2 1: EFI EFI 209.7 MB disk2s1 2: Microsoft Basic Data 内容备份2 4.0 TB disk2s2
再去：
➜ ~ diskutil unmountDisk force /dev/disk2 Forced unmount of all volumes on disk2 was successful
然后：
➜ ~ diskutil mountDisk force /dev/disk2 Usage: diskutil mountDisk DiskIdentifier|DeviceNode Attempt to mount the directly-mountable volumes on all of a whole disk's partitions. However, virtual volumes which are implied by e.g. Core Storage Physical Volumes, AppleRAID Members, etc. are not handled. If you specify a partition, then that partition's whole-disk parent is assumed.
然后还是：
➜ ~ sudo fsck_exfat -d /dev/disk2s2 Password: Opening /dev/rdisk2s2 fsck_exfat: Can't open /dev/rdisk2s2: Resource busy ➜ ~ sudo fsck_exfat -d /dev/disk2s2 Opening /dev/rdisk2s2 fsck_exfat: Can't open /dev/rdisk2s2: Resource busy
fsck_exfat Resource busy
➜ ~ diskutil unmountDisk /dev/disk2 Unmount of all volumes on disk2 was successful ➜ ~ diskutil eject /dev/disk2
始终没反应
最后超时了：
➜ ~ diskutil eject /dev/disk2 Volume timed out while waiting to eject
然后去看看：
➜ ~ ps aux | grep fsck root 20886 98.2 0.3 4346088 21132 ?? R 11:03上午 14:52.61 /System/Library/Filesystems/exfat.fs/Contents/Resources/./fsck_exfat -y /dev/rdisk2s2 crifan 21290 0.0 0.0 4286184 900 s006 R+ 11:19上午 0:00.00 grep --color=auto --exclude-dir=.bzr --exclude-dir=CVS --exclude-dir=.git --exclude-dir=.hg --exclude-dir=.svn fsck
去
➜ ~ sudo pkill -f fsck Password:
然后再去
sudo fsck_exfat -d /dev/disk2s2
就可以了。
【总结】
此处，去执行：
sudo fsck_exfat -d disk2s2
但是出错：
fsck_exfat: Can’t open /dev/rdisk2s2: Resource busy
的原因是
此处（exFAT的）本身出了问题的外接移动硬盘，插入Mac中后，Mac估计是检测出硬盘有问题，无法正常挂载，就自动，擅自主张的去尝试去修复，所以内部在执行fsck方面的命令。
所以导致此处硬盘被占用，别的命令，包括此处的fsck_exfat，无法继续操作，报Resource busy
解决办法：
干掉，杀掉之前的fsck
先用：
ps aux | grep fsck
确认的确有fsck进程在运行
再去杀掉：
sudo pkill -f fsck
注：或通过pid杀掉
kill -9 fsck_pid
然后其他命令，包括：
sudo fsck_exfat -d disk2s2
就都可以正常执行了。
转载请注明：在路上 » 【已解决】Mac中fsck_exfat出错Can’t open /dev/rdisk2s2 Resource busy