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| == SMR Flash Disk Cloning == | | == SMR Flash Disk Cloning == |
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| === New in 2011 version === | | === 2012 version with Xubuntu 12.04=== |
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| In order to support both VIA Nehemiah and Intel Atom based platforms two kernels must be included in the smr flash image.
| | ====Clone image to (new) disk==== |
| * 2.6.32.20-rtai supports multicore systems and hyperthreading
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| * 2.6.32.20-rtai-up supports single core systems and is optimized to the Via processors
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| A new clone script called <tt>multiclone</tt> must be used when this image is flashed. The script is in the root folder of rt15.
| | Make a new bootable disk from existing image: |
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| ==== Flash cloning procedure on rt15 ====
| | Use '''clone-xubuntu''' and '''clone-databar''' on smr24 (room 011) as root in /root, where available images are in the ''images'' subdirectory. |
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| Via processors using CF-card flash-disks:
| | ====Make new boot image==== |
| * Log in as root (If you don't know the password abort immediately)
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| * Insert the CF-card in the reader in the front of rt15.
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| * Check the device name the card is given: <tt>tail /var/log/messages</tt>. Usually it is <tt>/dev/sdb</tt>.
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| * Go to the image folder: <tt>cd image</tt>
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| * Locate the image you would like to burn (usually the newest one), for instance: <tt>flash-2011-01-01.tgz</tt>
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| * Start the procedure:
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| root@rt15:~# ../multiclone flash-2011-01-01.tgz /dev/sdb via
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| ''NB: Note the two dots in front of multiclone''
| | Update image on one of the 4GB sticks, then make new imagefile |
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| The procedure for cloning Intel Atom images is the same, except <tt>atom</tt> must be stated last in stead of <tt>via</tt> as in:
| | * put 4GB stick on another linux (with GRUP installed) |
| root@rt15:~# ../multiclone flash-2011-01-01.tgz /dev/sdb atom | | * 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 |
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| === Old description ===
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| Some of the SMR's now have solid-state flash memory disks, instead of the laptop, 2.5" disks used on older models.
| | ==Old description== |
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| 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.
| | [[old disk cloning procedure]] |
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| The commands below is implemented in this script Clone script. Usage:
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| clone <from_file.tar.gz> <to device>
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| <to device> can be both the USB bus (/dev/sdx) or a IDE device (/dev/hdx)
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| The script will place a file .cloned-at on the Flash Disk with time information for the cloning.
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| 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:
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| dd if=/dev/zero of=/dev/hdx bs=1 count=512
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| Writing an image
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| Format the disk, with one large Linux partition:
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| sfdisk -L /dev/sda <<EOF
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| ,,L,*
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| EOF
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| Create a filesystem:
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| mke2fs /dev/sda1 -L /
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| Mount the new, empty partition:
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| mkdir -p /tmp/u
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| mount /dev/sda1 /tmp/u
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| Write a previously created image from flash.tar.gz
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| zcat flash.tar.gz |
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| tar --extract --file - --directory /tmp/u --preserve-permissions
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| 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.)
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| patch -o /tmp/u/etc/lilo_usb.conf /tmp/u/etc/lilo.conf <<EOF
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| *** /tmp/u/etc/lilo.conf Tue Nov 4 21:34:44 2003
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| --- lilo_usb.conf Thu Dec 11 11:50:55 2003
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| ***************
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| *** 4,6 ****
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| # Start LILO global section
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| ! boot = /dev/hda
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| message = /boot/boot_message.txt
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| --- 4,7 ----
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| # Start LILO global section
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| ! boot = /dev/sda
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| ! disk = /dev/sda bios=0x80
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| message = /boot/boot_message.txt
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| EOF
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| Run LILO:
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| chroot /tmp/u lilo -v -C /etc/lilo_usb.conf
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| All done:
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| umount /dev/sda1
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| eject /dev/sda
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| Reading an image
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| Mount as above:
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| mkdir -p /tmp/u
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| mount /dev/sda1 /tmp/u
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| Read the partition:
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| tar --create --file - --directory /tmp/u --one-file-system --exclude lost+found . |
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| gzip > flash.tar.gz
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| or
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| tar -zcf - -C /tmp/u --one-file-system --exclude lost+found . > flash.tar.gz
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| All done:
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| umount /dev/sda1
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| eject /dev/sda
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