Changes between Version 38 and Version 39 of Installation/Nodes

Timestamp:

May 20, 2013 4:42:36 PM (12 years ago)

Author:

jhickey

Comment:

--

Installation/Nodes

@@ -232 +232 @@
 The testbed nodes should be set to boot only off of the network.  Disable hard drive boot to prevent failed PXE requests from falling through to booting whatever is on the disk.
 
+
+
 == Node Types ==
+
+=== Determining the disk type ===
+
+It is important to know what sort of disks your new nodes have.  FreeBSD differentiates between SATA and SAS drives by using the device types ad and da, respectively.  Also, with older machines, the first ATA disk unit number may be 4.  You will need to know what disk type and unit number you are dealing with before attempting to create a node type.  It is easiest to probably boot a node to a FreeBSD live USB key and run "''geom disk list''':
+
+{{{
+$ geom disk list
+Geom name: cd0
+Providers:
+1. Name: cd0
+   Mediasize: 0 (0B)
+   Sectorsize: 2048
+   Mode: r0w0e0
+   descr: NECVMWar VMware IDE CDR10
+   ident: (null)
+   fwsectors: 0
+   fwheads: 0
+
+Geom name: da0
+Providers:
+1. Name: da0
+   Mediasize: 85899345920 (80G)
+   Sectorsize: 512
+   Mode: r2w2e3
+   descr: VMware Virtual disk
+   ident: (null)
+   fwsectors: 63
+   fwheads: 255
+}}}
+
+So for this example, our type is '''da''' and our unit is 0.
+
+=== Determining the control network interface ===
+
+Before creating a node type, you should know which interface is the control network interface on your node.  Typically it is the first interface on the system, but sometimes it isn't.  You can double check that you have the correct interface by watching a node boot into the "freebsd.newnode" MFS.  During the boot, dhcp requests will be sent out of all interfaces in order to determine the control network interface.  You can also log into the MFS as root and run '''ifconfig -a''' to see which interface is configured.  When new nodes check in, you can also verify that the wiring detected matches which port your control network interface is wired to.
+
+=== Creating the type ===
 
 You will have to create a new "Node Type" for each class of node you wish to add to your testbed.