Raspberry Pi SD backup and restore

01. Start up  your terminal tool on computer.

02. Backup 備份：BackupSDImg (MaxOS)

    02-1。$df -h ( look for your SD Card. My card is listed as /dev/disk1s1. Once you know which card is your SD Card type)

    02-2。$diskutil unmount /dev/disk1s1 (or whatever your SD Card is listed as)

    02-3。$sudo dd if=/dev/disk1 of=/develope/rpi_backupImg/wheezy-raspbian-Backup.img bs=4m

03. Restore 還原：WritingSDImg (MaxOS) 

    03-1。$diskutil unmount /dev/disk1s1 (or whatever your SD Card is listed as)

    03-2。$sudo dd if=/develope/rpi_backupImg/wheezy-raspbian-Backup.img of=/dev/disk1 bs=4m

【Other】

$Ctrl+t (check backup process status查看備份進度)

$diskutil eject /dev/rdisk1 (Once the backup is complete execute)