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Old 10-13-2003, 09:56 PM   #1
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Registered: Oct 2003
Location: Virginia
Distribution: FreeBSD
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Not enough memory or Kernel panic: Your pick

I have a few compaq proliant servers floating around the pad collecting dust. After tinkering with them one day I got them all to work one quad machine and one dual machine. I installed OpenBSD without a problem. I recently got my hands on a copy of RH9.0 so I figured 'eh why not'. I popped the CD in and came back to a nice screen that said that I didn't have enough memory. The quad machine has 384M and the dual has 256. Clearly this was a mistake.
(for now we'll talk about the quad system)
I went ahead and entered "linux mem=393216K" and watched as it booted up. Everything went along just fine until it reported a Kernel panic:
EXT2-fs: unable to read superblock
cramfs: wrong magic
FAT: unable to read boot sector
isofs_read_super: bread failed, dev=09:02, iso_blknum=16, block=32
Kernel panic: VFS: Unable to mount root fs on 09:02

At this point the system is frozen with the caps and scroll lock lights blinking. (percussive mantenance on the keyboard results in various keyboard: unknown scancode or sequence errors) After rebooting I try entering "linux mem=384M" and I achieved the same results. Mind you - the machine works fine as OpenBSD detects everything as necessary. At this point I'm rather stumped - I tried using "linux expert" however that returns me to the not enough memory error - "linux expert mem=XXXM" results in a kernel panic.
Old 10-14-2003, 12:49 AM   #2
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Registered: May 2003
Location: Malaysia
Distribution: Slackware, LFS, CentOS
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Since I don't use Red Hat, I can only assume that the default (non-enterprise RH release) kernel RH boots to facilitate in the install does not have SMP support.

Maybe those who do use RH9 can confirm this?
Old 10-15-2003, 12:09 PM   #3
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Registered: Oct 2003
Location: Virginia
Distribution: FreeBSD
Posts: 6

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Incase anyone was wondering, these are Compaq Proliant servers. I don't have the Model and Series number (at this time) but they're on the machine itself. I'm wondering if it has something to do with the fact that it's a dual/quad machine. I've not had much experience with RH in the past few years - mostly FreeBSD/OpenBSD. I'm turning a new leaf and I'm in the process of converting my Win machines unto unix/linux machines. One will have slack (my first and most appreciated linux kernel based os) another freebsd another redhat etc jsut to get a feel for all of the various flavors and distrubutions. I definately need to but I'm not too far off from a .

I thank you for your relpy Azeem and I'll hit you up when I want to get back into the Slackware scene.
Old 11-11-2003, 01:16 AM   #4
Registered: Jun 2003
Location: Troy, NY (Near Albany)
Distribution: Ubuntu, Maemo OS2008, Debian
Posts: 94

Rep: Reputation: 15
try this for the 256MB ram machine

linux mem=exactmap mem=0x9f000@0 mem=0xff00000@100000

for the other one, youll have to convert 401604608 to hex. thats the amoubnt of ram in bytes. i know hex, but i cant do that number in my head hehe. and i dont have any tools on hand, im at school :P
anyways, give those a try and tell me how it goes. this method works for me, all the ram gets detected, BUT the machine freezes up after running for a while. ive yet to discover why. good luck


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