9.2.3. Backups on/from jazz drives, USB devices and such
These devices are usually mounted into the file system. After
the mount procedure, they are accessed as normal directories, so
you can use the standard commands for manipulating files.
In the example below, images are copied from a USB camera to the
robin:~> mount /mnt/camera
robin:~> mount | grep camera
/dev/sda1 on /mnt/camera type vfat (rw,nosuid,nodev)
If the camera is the only USB storage device that you ever
connect to your system, this is safe. But keep in mind that USB
devices are assigned entries in /dev as
they are connected to the system. Thus, if you first connect a USB
stick to your system, it will be on the /dev/sda entry, and if you connect your camera
after that, it will be assigned to /dev/sdb - provided that you do not have any SCSI
disks, which are also on /dev/sd*. On
newer systems, since kernel 2.6, a hotplug system called HAL
(Hardware Abstraction Layer) ensures that users don't have to deal
with this burden. If you want to check where your device is, type
dmesg after inserting it.
You can now copy the files:
robin:~> cp -R /mnt/camera/* images/
robin:~> umount /mnt/camera
Likewise, a jazz drive may be mounted on /mnt/jazz.
Appropriate lines should be added in /etc/modules.conf and /etc/fstab to make this work. Refer to specific
hardware HOWTOs for more information. On systems with a 2.6.x
kernel or higher, you may also want to check the man pages for
modprobe and modprobe.conf.