Andrei Borzenkov writes:
11.04.2016 05:03, Sam Varshavchik пишет: > grub 2.02, Fedora x86-64. > > I have /dev/sda and /dev/sdb in a RAID-1 configuration. This is the > Linux kernel's md-raid driver. > > /dev/sda started failing SMART. > > I ran /sbin/grub2-install /dev/sdb. My recollection is that it ran > without any complaints. > > After that, I yanked out /dev/sda. I reattached /dev/sdb as /dev/sda, > and put in a new hard drive as the new /dev/sdb. > > I booted up, and kicked off a rebuild of my RAID-1 volumes, everything > is going well. > > Now, after all of that was done, I decided to install grub2 on the new > /dev/sdb: > > [root@monster ~]# /sbin/grub2-install /dev/sdb > Installing for i386-pc platform. > /sbin/grub2-install: warning: Couldn't find physical volume ‘(null)’. > Some modules may be missing from core image.. > /sbin/grub2-install: warning: Couldn't find physical volume ‘(null)’. > Some modules may be missing from core image.. > Installation finished. No error reported. > > Now, anyone have any idea what's up with these warnings? >Could you show output of "mdadm --detail" for your MD device?
Below.Googling around finds some references of this warning coming out while the md-raid volumes are being synced. This warning still comes out after everything is fully synced up.
/dev/md0:
Version : 1.0
Creation Time : Sat Sep 18 18:15:10 2010
Raid Level : raid1
Array Size : 1048564 (1023.99 MiB 1073.73 MB)
Used Dev Size : 1048564 (1023.99 MiB 1073.73 MB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Mon Apr 11 06:53:19 2016
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : monster:0
UUID : 7ae940a5:bd5a0d0f:666adf78:e0c5b498
Events : 1188
Number Major Minor RaidDevice State
2 8 17 0 active sync /dev/sdb1
1 8 1 1 active sync /dev/sda1
/dev/md1:
Version : 1.1
Creation Time : Sat Sep 18 18:15:10 2010
Raid Level : raid1
Array Size : 1048568 (1023.99 MiB 1073.73 MB)
Used Dev Size : 1048568 (1023.99 MiB 1073.73 MB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Sun Apr 10 20:50:41 2016
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : monster:1
UUID : 067004a2:11daf9c2:0cedca66:ac63c62d
Events : 1127
Number Major Minor RaidDevice State
2 8 18 0 active sync /dev/sdb2
1 8 2 1 active sync /dev/sda2
/dev/md2:
Version : 1.1
Creation Time : Sat Sep 18 18:15:11 2010
Raid Level : raid1
Array Size : 104856576 (100.00 GiB 107.37 GB)
Used Dev Size : 104856576 (100.00 GiB 107.37 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Mon Apr 11 06:53:34 2016
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : monster:2
UUID : b0cb9b26:be362a98:012cdf18:19de5ac1
Events : 59413
Number Major Minor RaidDevice State
3 8 19 0 active sync /dev/sdb3
2 8 3 1 active sync /dev/sda3
/dev/md3:
Version : 1.1
Creation Time : Sun Nov 13 14:47:12 2011
Raid Level : raid1
Array Size : 869803752 (829.51 GiB 890.68 GB)
Used Dev Size : 869803752 (829.51 GiB 890.68 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Mon Apr 11 06:54:45 2016
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : monster:3
UUID : ac2446aa:661a4977:0960a296:6d0b48c3
Events : 165897
Number Major Minor RaidDevice State
3 8 21 0 active sync /dev/sdb5
2 8 5 1 active sync /dev/sda5
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