Ramdisk Size - correction

Tony Travis ajt at rri.sari.ac.uk
Mon Sep 22 14:12:54 EDT 2003


Tony Travis wrote:

> [...]
> For example, you could create a 10Mb initrd image of a RAM disk using:
> 
>     dd if=/dev/zero of=/var/tmp/initrd.img bs=1024 count=10240
>     mkfs -t ext3 /tftpboot/initrd.img
>     mkdir /mnt/ramdisk
>     mount -o loop /tftpboot/initrd.img /mnt/ramdisk
>     cp -a /stuff /mnt/ramdisk    # stuff you want on RAM disk
>     umount /var/tmp/initrd.img
>     zcat /tftpboot/initrd.img > /tftpboot/zinitrd.img

Hello, Eric.

Sorry, I was careless about pathnames - Here's a correction:

	dd if=/dev/zero of=/var/tmp/initrd.img bs=1024 count=10240
	mkfs -t ext3 /var/tmp/initrd.img
	mkdir /mnt/ramdisk
	mount -o loop /var/tmp/initrd.img /mnt/ramdisk
	cp -a /stuff /mnt/ramdisk    # stuff you want on RAM disk
	umount /var/tmp/initrd.img
	zcat /var/tmp/initrd.img > /tftpboot/zinitrd.img

You don't need the ramdisk image in /var/tmp once you've saved the 
compressed image: In my case, I'm PXE booting diskless openMosix from 
/tftpboot which is where the kernel and ramdisk image are stored.

	Tony.
-- 
Dr. A.J.Travis,                     |  mailto:ajt at rri.sari.ac.uk
Rowett Research Institute,          |    http://www.rri.sari.ac.uk/~ajt
Greenburn Road, Bucksburn,          |   phone:+44 (0)1224 712751
Aberdeen AB21 9SB, Scotland, UK.    |     fax:+44 (0)1224 716687

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