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eb_imagetypes [2007/03/07 15:32]
stevem
eb_imagetypes [2007/04/07 04:00] (current)
stevem
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 </​file>​ </​file>​
  
-==== EtherBoot from USB flash key ====+==== EtherBoot from USB flash ====
  
-An EtherBoot initial load from USB flash media, perhaps a flash key, is quite staightforward provided of course that your BIOS can boot from USB in the first place. ​ A modern ​BIOS will probably be able to do this, however there are two possible USB boot geometries and your BIOS may be able to boot from only one of them.+An EtherBoot initial load from USB flash media is quite staightforward provided of course that your BIOS can boot from USB in the first place. ​ A modern ​machine ​will probably be able to do this.
  
-Also required:+  - BIOS 
 +  - USB master boot record 
 +  - USB partition boot record 
 +  - SYSLINUX 
 +  - EtherBoot 
 +  - Linux kernel 
 + 
 +Your BIOS should really be able to boot from any sensible arrangement of partitions and boot sectors, but it might insist that a ZIP DRIVE geometry be used.  
 + 
 +Required:
  
 [[http://​syslinux.zytor.com/​|SYSLINUX]] [[http://​syslinux.zytor.com/​|SYSLINUX]]
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 Once Linux is running with USB storage support, an inserted USB key will appear as a SCSI drive and be called something like ///​dev/​sda//,​ ///​dev/​sdb//,​ ///​dev/​sdc//,​... in the following guide, the key is referred to as ///​dev/​sda//​. Once Linux is running with USB storage support, an inserted USB key will appear as a SCSI drive and be called something like ///​dev/​sda//,​ ///​dev/​sdb//,​ ///​dev/​sdc//,​... in the following guide, the key is referred to as ///​dev/​sda//​.
  
-** Ensure you are certain which device name is used by your flash key as this device is about to be irrevocably erased **+** Be certain which device name refers to your flash key as this device is about to be irrevocably erased **
  
-===== USB Flash key Hard disk drive =====+===== USB Flash EtherBoot ​General hard disk boot geometry  ​=====
  
-  *Prepare an activebootable ​USB key  +  * If necessaryprepare Linux to handle ​USB storage devices  This is up to your configuration and distribution For example, you might find these modules present if they are not already linked into the kernel:
-[[http://​flashlinux.org.uk/​make|Instructions]] ​+
  
-  ​*Install syslinux onto the bootable partition+  ​Module ​                 Size  Used by 
 +  sd_mod ​                ​19472 ​ 0  
 +  usb_storage ​           35588  0  
 +  libusual ​              ​14864 ​ 1 usb_storage 
 +  uhci_hcd ​              ​25100 ​ 0  
 +  usbcore ​              ​141956 ​ 4 usb_storage,​libusual,​uhci_hcd
  
-  ​syslinux ​/dev/sda1+  ​* Insert USB flash key and examine ​//dmesg// output
  
-===== USB Flash key - ZIP DRIVE geometry =====+  sda: sda1 
 +  sd 2:0:0:0: Attached scsi removable disk sda
  
-A standard zip drive appears to your BIOS as having 64 heads and 32 sectors per track. ​ The number of cylinders depends on the capacity of the drive. ​ A zip drive insists on booting from partition 4.+  * Wipe the master boot record ** losing all data **
  
-  ​*Use the mkdiskimage script from SYSLINUX to create a blank DOS-formatted image on your flash key, letting mkdiskimage work out the size of the device. ​ This may take a little while to complete.+  ​dd if=/​dev/​zero ​of=/dev/sda bs=1k count=128
  
-  ​mkdiskimage -4 /dev/sda 0 64 32+  ​* Create new partition
  
-  ​*Install syslinux onto the key.+  ​sfdisk /dev/sda [ENTER for defaults then (w)rite partition table]
  
-  ​syslinux ​/dev/sda4+  ​Device Boot    Start     ​End ​  #​cyls ​   #​blocks ​  ​Id ​ System 
 +  /​dev/​sda1 ​         0+   ​1021 ​   1022-    124683+ ​ 83  Linux 
 +  /​dev/​sda2 ​         0       ​- ​      ​0 ​         0    0  Empty 
 +  /​dev/​sda3 ​         0       ​- ​      ​0 ​         0    0  Empty 
 +  ​/​dev/​sda4 ​         ​0 ​      ​- ​      ​0 ​         0    0  Empty
  
-Finally, in exactly ​the same way as the Hard disk layout above, use the Etherboot ''​networkcard.zlilo''​ file in place of the Linux kernel and /dev/sda4 in place of the diskette device, follow these    [[http://​www.etherboot.org/​wiki/​eb_imagetypes#​lilogrubsyslinux_files_.zlilo|instructions]] +  * Mark the partition ​as active:
-above so that syslinux will load Etherboot.+
  
-More recipies can be found [[http://www.beezmo.com/​FloobyDustDir/​FDKnoppixUsbDir/​FDKnoppixUsb.htm|here]],​ with another source of information [[http://​www.freesoftwaremagazine.com/​articles/​grub_intro|here]].+  sfdisk ​/dev/sda -A1
  
 +  * Create a DOS filesystem on the newly created active partition
  
 +   ​mkdosfs /dev/sda1
  
-A recipe can be found [[http://​www.beezmo.com/​FloobyDustDir/​FDKnoppixUsbDir/​FDKnoppixUsb.htm|here]],​ with another source of information [[http://​www.freesoftwaremagazine.com/​articles/​grub_intro|here]].+  * Install SYSLINUX onto it
  
 +   ​syslinux /dev/sda1
 +
 +  * Mount the device and copy over required //​networkcard.zlilo//​ file and corresponding //​syslinux.cfg//​ [[eb_imagetypes#​Using lilo on a floppy|just as in a diskette boot]]. ​ There will now be three files on the flash device
 +
 +  root@shark(/​flash)#​ ls
 +  ldlinux.sys ​ r8169.zli ​ syslinux.cfg
 +
 +  root@shark(/​flash)#​ cat syslinux.cfg
 +  default r8169.zli
 +
 +  * Unmount the device, shutdown and reboot from the network.
 +
 + ===== USB Flash EtherBoot - ZIP drive geometry =====
 +An older machine may insist on a geometry which appears to your BIOS as a standard ZIP drive having 64 heads and 32 sectors per track. ​ The number of cylinders depends on the capacity of the drive. ​ A ZIP drive boots from partition 4.
 +
 +  * Use the mkdiskimage script from SYSLINUX to create a blank DOS-formatted image on your flash key, letting mkdiskimage work out the size of the device. ​ This may take a little while to complete.
 +
 +  mkdiskimage -4 /dev/sda 0 64 32
 +
 +  * Install SYSLINUX onto the key.
 +
 +  syslinux /dev/sda4
 +
 +  * Mount /dev/sda4 and copy over required //​networkcard.zlilo//​ file and corresponding //​syslinux.cfg//​ [[eb_imagetypes#​Using lilo on a floppy|just as in a diskette boot]]
 +
 +  * Unmount the device, shutdown and reboot from the network.
 +
 +
 +More recipies can be found [[http://​www.beezmo.com/​FloobyDustDir/​FDKnoppixUsbDir/​FDKnoppixUsb.htm|here]],​ with another source of information [[http://​www.freesoftwaremagazine.com/​articles/​grub_intro|here]].
  
 ===== PXE bootstrap loader (.zpxe) ===== ===== PXE bootstrap loader (.zpxe) =====

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