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OMAPL138 - Using USB Stick for root file system

I have a USB Stick that I want to use for the root file system...I connect to the 'standard' USB Host port and configure the command line: root=/dev/sda1:

 

  console=ttyS2,115200n8 noinitrd rw mem=32M@0xC0000000 root=/dev/sda1 ip=dhcp

 

The Linux kernel starts up - it sees the usb stick:

   Looking up port of RPC 100003/2 on 192.168.1.1
   scsi 1:0:0:0: Direct-Access     JetFlash TS512MJF110      8.07 PQ: 0 ANSI: 2
   sd 1:0:0:0: Attached scsi generic sg0 type 0
   sd 1:0:0:0: [sda] 1007614 512-byte logical blocks: (515 MB/491 MiB)
   sd 1:0:0:0: [sda] Write Protect is off
   sd 1:0:0:0: [sda] Assuming drive cache: write through
   sd 1:0:0:0: [sda] Assuming drive cache: write through
    sda: sda1
   sd 1:0:0:0: [sda] Assuming drive cache: write through
   sd 1:0:0:0: [sda] Attached SCSI removable disk

I get the following error:

  rpcbind: server 192.168.1.1 not responding, timed out
  Root-NFS: Unable to get nfsd port number from server, using default
  Looking up port of RPC 100005/1 on 192.168.1.1

What am I doing wrong?

tom