# dd

The following page contains uses for the `dd` command.

### Image a Disk

Using `dd`, with disk sdX, create a gzipped image:

```
dd if=/dev/sdX conv=sync,noerror bs=64K | gzip -c  > /path/to/backup.img.gz
```

If fat32, split into volumes:

```
dd if=/dev/sdX conv=sync,noerror bs=64K | gzip -c | split -a3 -b2G - /path/to/backup.img.gz
```

Save the drive geometry.

```
fdisk -l /dev/sdX > /path/to/list_fdisk.info
```

To restore a system:

```
gunzip -c /path/to/backup.img.gz | dd of=/dev/sdX
```

Or, if it's been split:

```
cat /path/to/backup.img.gz* | gunzip -c | dd of=/dev/sdX
```


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