On Sat, Mar 25, 2017 at 06:09:34PM -0300, Renaud OLGIATI wrote: ... ... > > 3 Removing The Failed Disk > > To remove /dev/sdb, we will mark /dev/sdb1 and /dev/sdb2 as failed and remove > them from their respective RAID arrays (/dev/md0 and /dev/md1).
Possibly too late. My defective RAID partitions are on a drive that is already not physically connected to the machine. That's the problem I'm trying to solve *safely*. > > First we mark /dev/sdb1 as failed: > mdadm --manage /dev/md0 --fail /dev/sdb1 mdadm is already aware that its other disk has failed. It's physically absent. ... ... > > Then power down the system: > shutdown -h now > and replace the old /dev/sdb hard drive with a new one I deeply believe it's the connection -- the interface and the cabling -- that is defective and not the hard drive. I have alredy provided a new drive in this slot only to have problems recur with the new drive. So I figure that it's probably not the drive, so the new drive will *be* the old one. I plan to conect it by rearranging the cablng so the drive is connected with a different cable to a different interface and a different power connector. Once I get it connected again, the worry will be that the file systems on the now-disconected drive will fool the boot process into booting from it instead of the up-to-date drive. Maybe I have to wipe the disk clean before reinstalling it. Which I'll probably have to do on a different machine. Or is it enough tto scramble the UUIDs of the file systems and to erase the RAI signatures? Or use DD to empty the partitions? Will dd to a partition erase the UUID of its file system? And the RAID signature? > (it must have at least the same size as the old one > if it's only a few MB smaller than the old one then rebuilding the > arrays will fail). > > > > 4 Adding The New Hard Disk > > After you have changed the hard disk /dev/sdb, boot the system. Once I's at this stage, with a clean second drive, I know how to proceed from here. -- hendrik _______________________________________________ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
