Flash disk cloning: Difference between revisions

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(New page: == SMR Flash Disk Cloning == Some of the SMR's now have solid-state flash memory disks, instead of the laptop, 2.5" disks used on older models. This wiki page contains some notes descr...)
 
 
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== SMR Flash Disk Cloning ==
== SMR Flash Disk Cloning ==


=== 2012 version with Xubuntu 12.04===


Some of the SMR's now have solid-state flash memory disks, instead of the laptop, 2.5" disks used on older models.
====Clone image to (new) disk====
 
This wiki page contains some notes describing how to write a bootable flash disk image (Slackware Linux) to a memory card. It assumes a Linux PC with USB flash card reader/writer, available as /dev/sda.
 
The commands below is implemented in this script Clone script. Usage:
 
clone <from_file.tar.gz> <to device>
<to device> can be both the USB bus (/dev/sdx) or a IDE device (/dev/hdx)
 
The script will place a file .cloned-at on the Flash Disk with time information for the cloning.
 
If you put the Flash Disk on the IDE bus and the computer will not boot (LILO - Timestamp mismatch) then the MBR on the Flash Disk must be erased as follows:
 
dd if=/dev/zero of=/dev/hdx bs=1 count=512
Writing an image
 
Format the disk, with one large Linux partition:
 
sfdisk -L /dev/sda <<EOF
,,L,*
EOF
Create a filesystem:
 
mke2fs /dev/sda1 -L /
Mount the new, empty partition:
 
mkdir -p /tmp/u
mount /dev/sda1 /tmp/u
Write a previously created image from flash.tar.gz
 
zcat flash.tar.gz |
tar --extract --file - --directory /tmp/u --preserve-permissions
Create a patched lilo.conf, so that we can run LILO with the flash card mounted via USB. (This won't be necessary if the image written above already contains such a file.)


patch -o /tmp/u/etc/lilo_usb.conf /tmp/u/etc/lilo.conf <<EOF
Make a new bootable disk from existing image:
*** /tmp/u/etc/lilo.conf        Tue Nov  4 21:34:44 2003
--- lilo_usb.conf      Thu Dec 11 11:50:55 2003
***************
*** 4,6 ****
  # Start LILO global section
! boot = /dev/hda
  message = /boot/boot_message.txt
--- 4,7 ----
  # Start LILO global section
! boot = /dev/sda
! disk = /dev/sda bios=0x80
  message = /boot/boot_message.txt
EOF
Run LILO:


chroot /tmp/u lilo -v -C /etc/lilo_usb.conf
Use '''clone-xubuntu''' and '''clone-databar''' on smr24 (room 011) as root in /root, where available images are in the ''images'' subdirectory.
All done:


umount /dev/sda1
====Make new boot image====
eject /dev/sda
Reading an image


Mount as above:
Update image on one of the 4GB sticks, then make new imagefile


  mkdir -p /tmp/u
* put 4GB stick on another linux (with GRUP installed)
  mount /dev/sda1 /tmp/u
* mount the disk on a local directory as root, e.g.:
Read the partition:
sudo bash
  mkdir -p disk
  mount /dev/sdb1 disk
* copy everything on disk to an image file (it takes several minutes):
cd disk
tar -czf ../image/smrXubuntu20120715.tar.gz *
cd ..
umount disk


tar --create --file - --directory /tmp/u --one-file-system --exclude lost+found . |
gzip > flash.tar.gz
or


tar -zcf - -C /tmp/u --one-file-system --exclude lost+found . > flash.tar.gz
==Old description==
All done:


umount /dev/sda1
[[old disk cloning procedure]]
eject /dev/sda

Latest revision as of 11:33, 29 August 2012

SMR Flash Disk Cloning

2012 version with Xubuntu 12.04

Clone image to (new) disk

Make a new bootable disk from existing image:

Use clone-xubuntu and clone-databar on smr24 (room 011) as root in /root, where available images are in the images subdirectory.

Make new boot image

Update image on one of the 4GB sticks, then make new imagefile

  • put 4GB stick on another linux (with GRUP installed)
  • mount the disk on a local directory as root, e.g.:
sudo bash
mkdir -p disk
mount /dev/sdb1 disk
  • copy everything on disk to an image file (it takes several minutes):
cd disk
tar -czf ../image/smrXubuntu20120715.tar.gz *
cd ..
umount disk


Old description

old disk cloning procedure

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