如何在 OSX 上获取 USB 设备的安装路径？

Question

我有一个备份脚本，可以将一些数据备份到 USB 设备。我遇到的问题是 OSX 有时会更改预期的安装路径。例如，如果某个文件被锁定在预期的挂载路径下，OSX 会将其挂载到另一个路径上。名为“BACKUP”的 USB 设备可以安装在 /Volumes/BACKUP-1 而不是 /Volumes/BACKUP。

有没有办法在 OSX 终端中找出 USB 设备的当前挂载路径？像'mount_path BACKUP'（命令是假的）之类的东西，如果设备没有安装，它会返回'/Volumes/BACKUP-1'或什么都不返回？

Answer 1

以下命令显示有关已安装卷的信息：

• 众所周知的 Unix mount，显示例如/dev/disk5s3安装在/Volumes/Foo
• diskutil list 显示所有磁盘和卷的概览
• diskutil info /dev/disk5s3显示有关该卷的信息，包括Volume UUID可用于唯一标识该卷的 。

您可以diskutil info使用卷的 UUID进行查询：

$ diskutil info DEC8759E-F77D-3EAE-B3EB-B6438F1AA428 | grep 'Mount Point'
   Mount Point:              /Volumes/DroboOne

我的系统上的示例命令输出：

$ mount
/dev/disk1 on / (hfs, local, journaled)
devfs on /dev (devfs, local, nobrowse)
map -hosts on /net (autofs, nosuid, automounted, nobrowse)
map auto_home on /home (autofs, automounted, nobrowse)
localhost:/bNqIvVr1ZdFBdf19Io81Q4 on /Volumes/MobileBackups (mtmfs, nosuid, read-only, nobrowse)
/dev/disk4 on /Volumes/MyBook (hfs, local, nodev, nosuid, journaled)
/dev/disk5s3 on /Volumes/DroboOne (hfs, local, nodev, nosuid, journaled, noowners)
/dev/disk7s3 on /Volumes/DroboTwo (hfs, local, nodev, nosuid, journaled, noowners)
/dev/disk6s3 on /Volumes/DroboThree (hfs, local, nodev, nosuid, journaled, noowners)

$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *256.1 GB   disk0
   1:                        EFI                         209.7 MB   disk0s1
   2:          Apple_CoreStorage                         240.0 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Servus10 HD            *239.7 GB   disk1
/dev/disk2
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *3.0 TB     disk2
   1:                        EFI                         209.7 MB   disk2s1
   2:          Apple_CoreStorage                         3.0 TB     disk2s2
   3:                 Apple_Boot Boot OS X               134.2 MB   disk2s3
/dev/disk4
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS MyBook                 *3.0 TB     disk4
/dev/disk5
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        *2.2 TB     disk5
   1:        Apple_partition_map                         32.3 KB    disk5s1
   2:                  Apple_HFS DroboOne                2.2 TB     disk5s3
/dev/disk6
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        *2.2 TB     disk6
   1:        Apple_partition_map                         32.3 KB    disk6s1
   2:                  Apple_HFS DroboThree              2.2 TB     disk6s3
/dev/disk7
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        *2.2 TB     disk7
   1:        Apple_partition_map                         32.3 KB    disk7s1
   2:                  Apple_HFS DroboTwo                2.2 TB     disk7s3

$ diskutil info /dev/disk5s3
   Device Identifier:        disk5s3
   Device Node:              /dev/disk5s3
   Part of Whole:            disk5
   Device / Media Name:      Untitled

   Volume Name:              DroboOne
   Escaped with Unicode:     DroboOne

   Mounted:                  Yes
   Mount Point:              /Volumes/DroboOne
   Escaped with Unicode:     /Volumes/DroboOne

   File System Personality:  Journaled HFS+
   Type (Bundle):            hfs
   Name (User Visible):      Mac OS Extended (Journaled)
   Journal:                  Journal size 172032 KB at offset 0x4001000
   Owners:                   Disabled

   Partition Type:           Apple_HFS
   OS Can Be Installed:      No
   Media Type:               Generic
   Protocol:                 FireWire
   SMART Status:             Not Supported
   Volume UUID:              DEC8759E-F77D-3EAE-B3EB-B6438F1AA428

   Total Size:               2.2 TB (2198888927232 Bytes) (exactly 4294704936 512-Byte-Blocks)
   Volume Free Space:        169.4 GB (169412173824 Bytes) (exactly 330883152 512-Byte-Blocks)
   Device Block Size:        512 Bytes

   Read-Only Media:          No
   Read-Only Volume:         No
   Ejectable:                Yes

   Whole:                    No
   Internal:                 No

Answer 2

这个命令怎么样：

df -lH | grep "Filesystem"; df -lH | grep "/Volumes/*"

在“Mounted on”列中，您可以获得安装在 上的所有设备的所有安装点"/Volumes"，在我的情况下几乎总是 USB 设备 ;-)

这些grep命令基本上跳过安装在"/".

在我的 OSX Snow Leopard 的终端中，我使用它来快速浏览当前连接的 USB 设备的挂载点。如果您只对挂载点感兴趣，而不对 UUID 等所有其他参数感兴趣，那么在我看来，这将是更直接的方式，而不是"diskutil"所有信息。