On 2/22/2014 21:37, Chris Murphy wrote: > > On Feb 22, 2014, at 12:46 PM, Don Levey <fedora-list@xxxxxxxxxxxxx> > wrote: > >> On 2/21/2014 11:38, Chris Murphy wrote: ... >> >>> What do you get for: >>> >>> mdadm -E /dev/sda mdadm -E /dev/sdc >>> >>> >> (this time, with commands, because I can learn. :-) ) >> >> [root@localhost don]# mdadm -E /dev/sda /dev/sda: MBR Magic : aa55 >> Partition[0] : 102760449 sectors at 63 (type 07) >> Partition[1] : 409600 sectors at 102760512 (type 83) >> Partition[2] : 209326268 sectors at 103170112 (type 8e) >> [root@localhost don]# mdadm -E /dev/sdc /dev/sdc: MBR Magic : aa55 >> Partition[0] : 102760449 sectors at 63 (type 07) >> Partition[1] : 409600 sectors at 102760512 (type 83) >> Partition[2] : 209326268 sectors at 103170112 (type 8e) >> >> So yes, they seem to be relating the same thing. > > It's not finding the IMSM metadata if this is firmware raid. In the > BIOS setup, you should find some setting related to this. Typically > the option setting is either raid, ide, or ahci. Maybe it was set to > raid when you initially did the install and then got changed to ide? > I wouldn't change it from what it is now, but it's worth checking the > setting to see if you recall it being changed recently. > I will check when I can reboot next - hopefully tonight. > Also show the result from each: > > cat /proc/mdstat pvck /dev/sda3 pvck /dev/sdc3 > [root@localhost don]# cat /proc/mdstat Personalities : unused devices: <none> [root@localhost don]# pvck /dev/sda3 WARNING: Failed to connect to lvmetad: No such file or directory. Falling back to internal scanning. Found label on /dev/sda3, sector 1, type=LVM2 001 Found text metadata area: offset=4096, size=192512 [root@localhost don]# pvck /dev/sdc3 WARNING: Failed to connect to lvmetad: No such file or directory. Falling back to internal scanning. Found label on /dev/sdc3, sector 1, type=LVM2 001 Found text metadata area: offset=4096, size=192512 > What I'm betting on at this point (guessing), is that the raid array > is not active, and therefore two identical UUID physical volumes are > present rather than appearing as one, and grub is becoming confused. > On a separate machine, running software RAID1, I see active raid devices. That I am not seeing them here would support your suggestion that the raid array isn't active, no? > And the other problem is that there simply isn't enough space to > embed core.img in the MBR gap as usual, because the support modules > for RAID and LVM make it too big. There is a way to use block lists, > but before doing that the whole raid thing needs to be figured out. > Interesting. This makes me wonder why it all worked before. This was a machine I inherited from a friend, with the raid devices already there, and running Windows. When I installed on it, from what I recall, it presented me with a single volume, and never behaved as if there were two devices. > I haven't done a lot of testing in this area with actual hardware but > some people say using software raid between Windows and Linux is > flakey. I think it ought to work or it's a bug. But the thing to > realize is that you have a Windows driver doing software raid when > Windows is running; and then you have a linux driver doing software > raid when linux is running. So it's absolutely got to work correctly > or you've totally defeated the purpose of even having raid1, and > instead you're better off with just a regular consistent backup, like > once an hour or something. > > I can appreciate that. If this were a mission-critical machine I might be able to justify the setup for a regular, hourly, backup. At this point, though, that seems overkill. If this hadn't been working before, I would probably just accept that it's not going to work and move on. Thank you again, -Don -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
