Linux USB flash drive access problems

Mount-t vfat/dev/sda1/mnt/usb to your/mnt/usb Directory: cd/mnt/usb, you can read and write data like using other Windows partitions. When uninstalling umount/mnt/usb, sometimes, the system prompts that the device is busy. Solution: I. umout mobile hard drive www.2cto.com started to use sftp to copy the installation file to the server, the speed is too slow, 500 k/s. It takes more than half an hour to copy a few G items. I can't hold it, But I just copied it with a mobile hard disk. The format of the mobile hard disk is incorrect. It is in NTFS format and cannot be recognized by Linux. It can only be formatted as FAT32. GG's win7 system does not have the function of formatting to FAT32. A little abnormal. I asked my colleagues to help me format it in XP. After the installation file is copied to the server, colleagues directly unmount the mobile hard disk from the server. As a result, run the df command to check whether the mounted mobile hard disk still exists. [Root @ qs-wg-db1 ~] # Df-lh Filesystem Size Used Avail Use % Mounted on/dev/sdb3 125G 3.3G 115G 3% // dev/sdb1 99 M 12 M 82 M 13%/boot tmpfs 3.9G 0 3.9G 0%/dev/shm/dev/sda1 275G 72G 189G 28%/u01/dev/sdc1 10G 2.0G 8.1G 20%/datatmp is this/dev/sdc1. When you use the umount command, the system prompts that the device is busy and cannot be mounted. Solution: www.2cto.com [root @ qs-wg-db1 ~] # Fuser-km/datatmp [root @ qs-wg-db1 ~] # Df-lh Filesystem Size Used Avail Use % Mounted on/dev/sdb3 125G 3.3G 115G 3% // dev/sdb1 99 M 12 M 82 M 13%/boot tmpfs 3.9G 0 3.9G 0%/dev/shm/dev/sda1 275G 72G 189G 28%/u01/dev/sdc1 10G 2.0G 8.1G 20%/datatmp [root @ qs-wg-db1 ~] # Umount/datatmp www.2cto.com [root @ qs-wg-db1 ~] # Df-lh Filesystem Size Used Avail Use % Mounted on/dev/sdb3 125G 3.3G 115G 3% // dev/sdb1 99 M 12 M 82 M 13%/boot tmpfs 3.9G 0 3.9G 0%/dev/shm/dev/sda1 275G 72G 189G 28%/u01 success umount.