raspberry pi에 USB Flash Memory(FAT32) 읽기 쓰기가 가능하도록 마운트 (Mount FAT32 usb stick read,write permission)

USB Flash memory를 FAT32로 포맷하고 이것을 마운트 하려면 다음과 같이 한다.

굵은 글씨는 명령어.

pi@rpi ~ $ lsusb
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 005: ID 0781:5580 SanDisk Corp.
Bus 001 Device 004: ID 0d8c:0105 C-Media Electronics, Inc. CM108 Audio Controller


USB Flash memory가 lsusb에 나타났다.

pi@rpi ~ $ tail -f /var/log/messagesFeb 28 05:09:34 rpi kernel: [58069.795528] usb-storage 1-1.2:1.0: USB Mass Storage device detected
Feb 28 05:09:34 rpi kernel: [58069.796076] scsi host0: usb-storage 1-1.2:1.0
Feb 28 05:09:34 rpi kernel: [58069.820379] usbcore: registered new interface driver uas
Feb 28 05:09:35 rpi kernel: [58070.793472] scsi 0:0:0:0: Direct-Access     SanDisk  Extreme          0001 PQ: 0 ANSI: 6
Feb 28 05:09:35 rpi kernel: [58070.796241] sd 0:0:0:0: [sda] 31277232 512-byte logical blocks: (16.0 GB/14.9 GiB)
Feb 28 05:09:35 rpi kernel: [58070.797056] sd 0:0:0:0: [sda] Write Protect is off
Feb 28 05:09:35 rpi kernel: [58070.797777] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
Feb 28 05:09:35 rpi kernel: [58070.802944]  sda: sda4Feb 28 05:09:35 rpi kernel: [58070.806540] sd 0:0:0:0: [sda] Attached SCSI disk
Feb 28 05:09:35 rpi kernel: [58070.825946] sd 0:0:0:0: Attached scsi generic sg0 type 0

꼽았을때 sda4로 잡혔음을 알 수 있다.

그렇다면 sda4를 마운트 하면됨.
pi@rpi ~ $ sudo mount -t vfat /dev/sda4 /media/usbstick -o rw,umask=111,dmask=000
pi@rpi ~ $ ls /media/usbstick/ -l
total 8
drwxrwxrwx 3 root root 8192 Feb 28 05:28 log

이제 usb flash memory의 내용이 잘 보임. 마운트가 잘되었음.

pi@rpi /media/usbstick/log/201502 $ ls -l

total 8

-rw-rw-rw- 1 root root 15 Feb 28 05:29 20150228142900.txt

중요한것은 umask와 dmask에 따라서 디렉토리와 파일의 권한이 달라진다는점.