Wrong device mapped.

Post #304,504 by static 2/22/09 6:43:16 AM Reply	Wrong device mapped. Whatever device your kernel thinks is the CD R/W drive is wrong. udev persistent rules again? I don't know. I can see how it might be the bootloader, if it's passing something to the kernel about which device is the CD R/W (but why?) Wade. "Ah -- I take it the doorbell doesn't work?"
Post #304,509 by folkert 2/22/09 8:31:22 AM Reply	Which leads us back to... Installing LILO fixes the device mapping issue and thus is not the root cause but relieves the issue. I'd imagine that re-installing grub would work after the LILO steps. But is it really worth the pain LILO presents? I'd bet that: apt-get install --reinstall grub grub-common Would work just fine... or something similar that causes the machine to re-probe and write out the devices.
Post #304,511 by drook 2/22/09 10:48:45 AM Reply	I'll try that I completely agree with you that Grub/LILO doesn't sound like the actual problem, but if it's a set of steps that works I'll do it. Any potential gotchas doing the Grub reinstall? -- Drew
Post #304,519 by folkert 2/22/09 5:31:48 PM Reply	None that I know of... Even if there were, its more recoverable.
Post #304,831 by drook 2/27/09 9:05:44 PM Reply	Nope, didn't work Any pointers to research this? -- Drew
Post #304,835 by malraux 2/27/09 10:27:40 PM Reply	Re: Nope, didn't work Dang, where's that rickroll link... Regards, -scott Welcome to Rivendell, Mr. Anderson.
Post #304,837 by scoenye 2/27/09 11:37:04 PM Reply	Possible related issue, from the other side of the coin About 6 months ago, I started running into problems with new HP laptops. The issue usually manifests itself as extremely slow SATA harddrive performance. Intel's ICH8+ chipsets allow for a AHCI/IDE combination mode which confuses the heck out of the kernel. This can be selected in the BIOS. Locking in AHCI would be the preferred way, but it completely locks out real IDE devices if they are present because the kernel will not go looking for them (in HP's case: the CD drives...) The other option is to set the BIOS to something other than AHCI, and add the ide0=noprobe boot parameter. Is there any way you can compare the boot parameters between GRUB and LILO? (Warning: if this is a dual boot setup with Windows, do not change the BIOS option. Windows will no longer boot.)
Post #304,840 by drook 2/28/09 12:02:45 AM Reply	No dual boot Going to try playing with BIOS settings. -- Drew

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