Isolinux ramdisk size

rbautch · 07-02-2006, 07:53 PM

I'm booting a CD with ISOLINUX and loading my own initrd.img. When mounting the initrid.img, I initially got an error that there "wasn't enough space on the device", but when I adjusted the ramdisk_size parameter in the isolinux.cfg file, it worked fine. When the initrid.img is mounted, it uses 75% of the capacity on /dev/ram0. My problem is that when I use the cpio command to unpack an archive on an attached drive, the usage on /dev/ram0 jumps up to 100% and the command fails. How can I increase the size of /dev/ram0?

win32sux · 07-02-2006, 08:51 PM

ramdisk size is an option at kernel compile time...

for linux 2.4.x it's located at:

Block devices --> RAM disk support --> Default RAM disk size (NEW)

but yeah, if you wanna change the default size without recompiling, i *think* you just need to add a parameter like this (example) to your kernel's line in your isolinux.cfg:

Code:

ramdisk_size=8192

rbautch · 07-03-2006, 11:03 AM

Quote:

Originally Posted by win32sux

ramdisk size is an option at kernel compile time...

for linux 2.4.x it's located at:

Block devices --> RAM disk support --> Default RAM disk size (NEW)

but yeah, if you wanna change the default size without recompiling, i *think* you just need to add a parameter like this (example) to your kernel's line in your isolinux.cfg:

Code:

ramdisk_size=8192

Thanks. Turns out the ramdisk_size parameter sets the maximum size of the ramdisk when the initrd.img gets mounted. What I needed to do was to intrease the size of the initrd.img itself.