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-rw-r--r--doc/usage/partitions.rst17
1 files changed, 14 insertions, 3 deletions
diff --git a/doc/usage/partitions.rst b/doc/usage/partitions.rst
index 628469b..acf4573 100644
--- a/doc/usage/partitions.rst
+++ b/doc/usage/partitions.rst
@@ -44,9 +44,20 @@ partname
<devtype><devletter><partnum>
devtype
- A device type like ``mmcsd`` or ``hd``. See the
- ``part_set_generic_name`` function in ``disk/part.c`` for a
- complete list.
+ The devtype field is set in dependence of the device class:
+
+ ======= ===============
+ devtype device class
+ ======= ===============
+ hd IDE or SATA
+ sd SCSI
+ usbd USB
+ mmcsd eMMC or SD-card
+ xx others
+ ======= ===============
+
+ See the ``part_set_generic_name`` function in ``disk/part.c``
+ for the complete list.
devletter
The device number as an offset from ``a``. For example, device