Hammer How to Thumb Drive - Revision history

Robotguy at 22:48, 11 July 2008

2008-07-11T22:48:16Z

Robotguy at 22:40, 11 July 2008

2008-07-11T22:40:28Z

Dhylands: Added note about creating /dev/sdaX and copying fstab and inittab into root tree

2008-04-18T14:38:01Z

Added note about creating /dev/sdaX and copying fstab and inittab into root tree

Robotguy at 08:44, 6 February 2008

2008-02-06T08:44:13Z

Robotguy at 09:07, 22 January 2008

2008-01-22T09:07:35Z

Robotguy at 02:45, 21 January 2008

2008-01-21T02:45:55Z

Robotguy at 08:52, 15 January 2008

2008-01-15T08:52:51Z

Robotguy at 08:47, 15 January 2008

2008-01-15T08:47:03Z

Robotguy at 03:51, 14 January 2008

2008-01-14T03:51:59Z

Robotguy at 03:18, 14 January 2008

2008-01-14T03:18:05Z

New page

You can add a USB Thumb Drive to your Hammer pretty easily. There are a few things you have to have in your kernel.

You must have:
* USB Core
* USB Storage
* SCSI, including generic support.

@@ Line 7: / Line 7: @@
 * USB Storage (usb_storage)
-Make sure these are getting loaded if you have them built as modules. You should load modules in the order above to make sure everything happens as it should. I have a 10 second wait (sleep 10) rght after loading usb_storage to give the USB time to settle down.
+You can add this to your inittab file:
-configured in your [[Hammer_How_to_build_Kernel|kernel]]. Also be sure to activate the ''Kernel Automounter v4'' and ''Automatic Kernel Module Loading'' so your Thumb Drive will be automatically mounted at bootup.
+  null::sysinit:/sbin/modprobe scsi_mod
+  null::sysinit:/sbin/modprobe sd_mod
-One way to get the USB Thumb Drive recognized and mounted is:
+  null::sysinit:/bin/sleep 5
+  null::sysinit:/sbin/modprobe usbcore
-Add the necessary commands to the '''inittab''' file:
-* cd buildroot/target/device/Samsung/Hammer/target_skeleton/etc
-* edit the '''inittab'''.
-* Add these commands right ''below the jffs2'' line:
    null::sysinit:/sbin/modprobe usb-storage
    null::sysinit:/bin/sleep 10
-This will load the usb-storage module and wait for it to settle down.
+The sleeps allow time for each subsystem to settle. Add those lines after the JFFS2 filesystem mount to be sure they get done early in the boot process.
 Now you have to fix up the mount point where you want the Thumb Drive to appear. You can add a new mount point by editing the '''buildroot/target/device/Samsung/Hammer/device_table.txt''' file. If you want to mount your Thumb Drive at /opt (recommended for starters) then add the following line to '''device_table.txt''':
   /opt            d       755     0       0       -       -       -       -       -
 You'll want to uncomment the two lines that start in /dev/sda. You'll probably also want to change the 15 at the end of the 2nd line to a more reasonable number like 4. Then it will only create /dev/sda1, /dev/sda2, /dev/sda3, and /dev/sda4.
@@ Line 37: / Line 29: @@
   /dev/sda	b	640	0	0	8	0	0	0	-
   /dev/sda	b	640	0	0	8	1	1	1	4
 Now it is time to add the Thumb Drive to your file system. When you build your rootfs, the /opt directory will be created for you with the permissions you set.

@@ Line 1: / Line 1: @@
 You can add a USB Thumb Drive to your Hammer pretty easily.  There are a few things you have to have in your kernel. Your Thumb Drive will be recognized as a SCSI device, probably /dev/sda1, if it is the only SCSI type device you have. When the usb-storage module loads, it will show which SCSI device you Thumb Drive is. Modular kernels are nice, and it is not difficult to be sure you have the right modules loaded. This how to is based on building everything possibe as modules.
-You must have:
+You '''must''' have the following built into your kernel or as modules:
-* USB Core
+* SCSI support (scsi_mod)
-* USB Storage
+* SCSI disk (sd_mod) support.
-* SCSI, including SCSI disk and generic support.
+* USB Core (usbcore)
 configured in your [[Hammer_How_to_build_Kernel|kernel]]. Also be sure to activate the ''Kernel Automounter v4'' and ''Automatic Kernel Module Loading'' so your Thumb Drive will be automatically mounted at bootup.

@@ Line 22: / Line 22: @@
   /opt            d       755     0       0       -       -       -       -       -
 Now it is time to add the Thumb Drive to your file system. When you build your rootfs, the /opt directory will be created for you with the permissions you set.
@@ Line 32: / Line 45: @@
 You can setup your Thumb drive for any mount point you want using this procedure. You can even mount your Thumb Drive as /usr.
 [[Category:TCT-Hammer]]
 [[Category:TinCanTools]]

@@ Line 29: / Line 29: @@
   /dev/sda1       /opt            ext2    defaults                0       0
-You can setup your Thumb drive for any mount point you want using this procedure. You can even mount your Thumb Drive as /usr. This allows the Thumb Drive to be automatically setup and mounted for use.
+This allows the Thumb Drive to be automatically setup and mounted for use.
 [[Category:TCT-Hammer]]
 [[Category:TinCanTools]]

@@ Line 1: / Line 1: @@
-You can add a USB Thumb Drive to your Hammer pretty easily.  There are a few things you have to have in your kernel. Your Thumb Drive will be recognized as a SCSI device, probably /dev/sda1, if it is the only SCSI type device you have. When the usb-storage module loads, it will show which SCSI device you Thumb Drive is.
+You can add a USB Thumb Drive to your Hammer pretty easily.  There are a few things you have to have in your kernel. Your Thumb Drive will be recognized as a SCSI device, probably /dev/sda1, if it is the only SCSI type device you have. When the usb-storage module loads, it will show which SCSI device you Thumb Drive is. Modular kernels are nice, and it is not difficult to be sure you have the right modules loaded. This how to is based on building everything possibe as modules.
 You must have:
 * USB Core
 * USB Storage
-* SCSI, including generic support.
+* SCSI, including SCSI disk and generic support.
 configured in your [[Hammer_How_to_build_Kernel|kernel]]. Also be sure to activate the Kernel Automounter so your Thumb Drive will be automatically mounted at bootup.
 One way to get the USB Thumb Drive recognized and mounted is:
@@ Line 28: / Line 29: @@
   /dev/sda1       /opt            ext2    defaults                0       0
-You can setup your Thumb drive for any mount point you want using this procedure. This allows the Thumb Drive to be automatically setup and mounted for use.
+You can setup your Thumb drive for any mount point you want using this procedure. You can even mount your Thumb Drive as /usr. This allows the Thumb Drive to be automatically setup and mounted for use.
 [[Category:TCT-Hammer]]
 [[Category:TinCanTools]]

← Older revision		Revision as of 03:51, 14 January 2008
Line 5:		Line 5:
	* USB Storage		* USB Storage
	* SCSI, including generic support.		* SCSI, including generic support.
		+
		+	[[Category:TCT-Hammer]]
		+	[[Category:TinCanTools]]