[syslinux] MEMDISK issue with OptiPlex GX280,620

[Jason Vasquez]

Splendid trick using dd to help better compress an image. I did not know that was possible. Thank you for sharing.

More information now to share about my MEMDISK issue for possible reference. I created an ISO image of my test disc that contains the PC-DOS/Ghost disk image. I then remastered the test CD to include the ISO image. Using SYSLINUX 4.03's MEMDISK to boot the ISO image file surprisingly allowed for the Ghost environment to see the GX280's SATA drive. That is, no "We lost the last drive in our class of drives" occurred using this approach -- booting an ISO containing the HDD image, unlike booting the HDD image directly. Doubly odd, no?

Regards.

----- Original Message -----
From: "Shao Miller" <Shao.Miller at yrdsb.edu.on.ca>
To: syslinux at zytor.com
Sent: Tuesday, December 7, 2010 7:33:30 PM GMT -05:00 US/Canada Eastern
Subject: Re: [syslinux] MEMDISK issue with OptiPlex GX280,620

Oh, I forgot to mention that MEMDISK can gunzip a gzipped initrd (the 
RAM disk image).  Thus if you delete all unwanted files out of the disk 
(or attached/mounted disk image), then do something like:

   dd if=/dev/zero of=/mnt/ghost/0
   ... No space left on device...
   rm /mnt/ghost/0
   umount /mnt/ghost
   gzip -9 ~/ghost.hdd

You will get a pretty nice size for the resulting file. :)  Filling the 
filesystem's unused space with a 0 pattern should allow it to compress 
quite well.

- Shao Miller
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