Changes between Version 10 and Version 11 of linux/blockdev

Timestamp:

06/18/2019 03:33:09 PM (5 years ago)

Author:

Ryan Erbstoesser

Comment:

clarify disk image instructions

linux/blockdev

@@ -147 +147 @@
 
 Compared to distributing filesystem images or archives of filesystem contents this has method has some pro's and con's:
- * Pro's:
+ * Pros:
   * Other OS's can install this type of image onto another block storage device (such as Windows via [http://www.alexpage.de/usb-image-tool/ USB Image Tool])
- * Con's:
+ * Cons:
   * Images are created from a fixed-size block device and require the same or larger size block device to be installed onto
   * After installation any additional storage space (ie installing an image meant for a 2GB microSD onto a 16GB microSD) can not be used until the disk is re-partitioned and re-sized
@@ -158 +158 @@
 }}}
 
-=== Creating a disk image ===
-Procedure to create disk image from {{{/dev/sdc}}}:
+=== Creating a Disk Image ===
+Often disk images are provided already by Gateworks. If so, please skip this section. However, to create a disk image from the data already on a microSD, proceed with the following instructions.
+
+Procedure to create disk image from the microSD {{{/dev/sdc}}}:
 1. (Optional) Zero out the storage device first (if not already done) to allow for the best compression as even if previous contents have been 'deleted' the data still exists (the filesystem directory table has just unlinked from it):
 {{{#!bash
@@ -175 +177 @@
 
 
-=== Using a disk image ===
-Procedure to write a disk image back to {{{/dev/sdc}}}:
+=== Using a Disk Image ===
+This procedure is to write a disk image to a microSD.
+
+Insert the microSD into a Linux desktop or laptop PC. (not the Gateworks SBC)
+
+The microSD should mount to the filesystem as something like /dev/sdb or /dev/sdc.
+
+Verify on the system what letter it mounted as and be sure to not overwrite the main disk on the PC, which is typically /dev/sda. 
+
+Adjust the disk letter in the command below to write to the microSD with the pre-built disk image: (/dev/sdc is shown as an example only)
  * Linux:
 {{{#!bash