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Updated Boot HermitCore from a raw image (markdown)

Stefan Lankes 2017-05-28 19:12:49 +02:00
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10
Boot-HermitCore-from-a-raw-image.md

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Sometime is it useful to boot HermitCore from a raw image. For instance, [Google Compute Platform](https://cloud.google.com/compute/docs/images/import-existing-image) depends on this image format.
In this tutorial, an image will be created for the application _stream_. At first, we create with `dd` an raw file. A size of 50 Mb (=512 block size * 102400 block) is for `stream` large enough.
In this tutorial, an image will be created for the application _stream_. At first, we create with `dd` an raw file. A size of 1 Gb is the smallest possible size for the Google Compute Platform and *large* enough.
```bash
$ dd if=/dev/zero of=stream.raw bs=512 count=102400
102400+0 records in
102400+0 records out
52428800 bytes (52 MB, 50 MiB) copied, 0.138028 s, 380 MB/s
$ dd if=/dev/zero of=stream.raw bs=1G count=1
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 2.10712 s, 510 MB/s
```
Like a normal hard disk, we have to partition the image. The following command create one big partition.