[CentOS] /dev/sda

[Lamar Owen]

On Tuesday, December 06, 2011 02:46:24 PM m.roth at 5-cent.us wrote:
> Booting purposes is the point: /dev/md0 is /boot. And as the slot's ATA0,
> it should come up as sda. You mention getting the bootloader sectors over
> - do you mean, after it's rebuilt and active, to then rerun grub-install?

Either that, or dd the stage1.5 sectors over.  See
https://en.wikipedia.org/wiki/GNU_GRUB#GRUB_version_1

for more information on where the stage1.5 is located on the disk.

> Remember, the drive that's failing is /dev/sda. I also don't see why, if I
> replace the original drive in the original slot (I'm doing this on the
> clone, whose drive is just fine, thankyouveddymuch), it isn't recognized
> as /dev/sda.

I've seen that happen before.  It was a tad disconcerting at first, but, yes, in the case I saw it a reboot made it back to sda.

> Another question, for you, or Johnny - where's the source code for
> udevadm? The documentation doesn't, and I was just trying to yum install
> the udev-devel so I could look at the source code, and there's no such
> package.

The udev source RPM should contain this.  As CentOS 5 doesn't include udevadm, I'm assuming this is CentOS 6, which does, so you'd want to get

http://vault.centos.org/6.0/cr/SRPMS/Packages/udev-147-2.35.el6.src.rpm

which is the latest CentOS source package. (6.2 has a newer one; you could, if you wanted to, go to ftp.redhat.com and grab the src.rpm there).