10-27-2011
The system will not keep sda as my boot drive
Hi everyone!
A very frustrating night!!! I installed a new linux server on my system that has IDE drives and SATA drives. At the time of installation I only had IDE drive plugged in and that is where I install the linux. Everything works fine until I shut the system down and plug in my SATA backup drive. During boot, kernel panic appears and the system will not boot! My backup drive appears to be sda now!!!! And of course since my fstab has sda1 listed as the root partition it fails. I know you can assign certain drives using udev, but this happens before the system even boots.
The real question is, and I have been trying to find it all over the net and I am very surprised that nobody has even asked, and that is:
How can I keep my sda to be ALWAYS that IDE drive? Just like in the good old days when hda was always hda and as long as it is connected to the first IDE controller and it is the first drive it will always be hda and nothing else. This sda, sdb issue is really very frustrating, or I am missing something here?
Please help!!!!
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LEARN ABOUT NETBSD
viaide
VIAIDE(4) BSD Kernel Interfaces Manual VIAIDE(4)
NAME
viaide -- AMD, NVIDIA and VIA IDE disk controllers driver
SYNOPSIS
viaide* at pci? dev ? function ? flags 0x0000
options PCIIDE_AMD756_ENABLEDMA
DESCRIPTION
The viaide driver supports the following IDE controllers and provides the interface with the hardware for the ata driver:
- Advanced Micro Devices AMD-756, 766, 768 and CS5536 IDE Controllers
- NVIDIA nForce, nForce2, nForce2 400, nForce3, nForce3 250, nForce4, MCP04, MCP55, MCP61, MCP65, MCP67 IDE and SATA Controllers.
- VIA Technologies VT82C586, VT82C586A, VT82C596A, VT82C686A, VT8233A, VT8235, VT8237/VT8237R IDE Controllers, VT6421 Serial RAID
Controller and CX700 IDE Controller.
The 0x0002 flag forces the viaide driver to disable DMA on chipsets for which DMA would normally be enabled. This can be used as a debugging
aid, or to work around problems where the IDE controller is wired up to the system incorrectly.
SEE ALSO
ata(4), atapi(4), intro(4), pci(4), pciide(4), wd(4), wdc(4)
NOTES
Drives on the VT6421 Serial RAID Controller can only be accessed after they have been configured into RAID or JBOD sets via its BIOS. It is
also inaptly named as it has both SATA and PATA interfaces.
BUGS
The AMD756 chip revision D2 has a bug affecting DMA (but not Ultra-DMA) modes. The workaround documented by AMD is to not use DMA on any
drive which does not support Ultra-DMA modes. This does not appear to be necessary on all drives, the PCIIDE_AMD756_ENABLEDMA option can be
used to force multiword DMA on the buggy revisions. Multiword DMA can eventually be disabled on a per-drive basis with config flags, see
wd(4). The bug, if triggered, will cause a total system hang.
The timings used for the PIO and DMA modes for controllers listed above are for a PCI bus running at 30 or 33 MHz. This driver may not work
properly on overclocked systems.
BSD
August 31, 2007 BSD