Am 01.03.2017 um 00:15 schrieb Peter Sangas:
Thanks for your help. See below for output
Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4]
not sure if it means something but i only see the on the machines used
raid-levels at that line - looks like i am out of ideas for now, i saw
the "grub-install: warning: Couldn't find physical volume `(null)'"
messages (while it at the same time said it was successful) as i removed
2 out of my 4 drives from the RAID10 by using the script below and after
both where in sync "grub2-sintall /dev/sd[a-d]" was completly silent again
___________________________________________________
#!/bin/bash
GOOD_DISK="/dev/sda"
BAD_DISK="/dev/sdc"
# clone MBR
dd if=$GOOD_DISK of=$BAD_DISK bs=512 count=1
# force OS to read partition tables
partprobe $BAD_DISK
# start RAID recovery
mdadm /dev/md0 --add ${BAD_DISK}1
mdadm /dev/md1 --add ${BAD_DISK}2
mdadm /dev/md2 --add ${BAD_DISK}3
# print RAID status on screen
sleep 5
cat /proc/mdstat
# install bootloader on replacement disk
grub2-install "$BAD_DISK"
___________________________________________________
-----Original Message-----
From: Reindl Harald [mailto:h.reindl@xxxxxxxxxxxxx]
Sent: Tuesday, February 28, 2017 2:34 PM
To: linux-raid@xxxxxxxxxxxxxxx
Subject: Re: GRUB warning after replacing disk drive in RAID1
Am 28.02.2017 um 22:01 schrieb Peter Sangas:
But I issue the grub command AFTER the re-sync is completed
output of "cat /proc/mdstat" and your environment missing!
* cat /proc/mdstat
* df -hT
* lsscsi
* lsblk
no pictures and interpretations, just copy&paste from the terminal (input
as well as output)
please help others to help you
cat /proc/mdstat
Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4]
[raid10]
md3 : active raid1 sdc5[3] sdb5[1] sda5[0]
97589248 blocks super 1.2 [3/3] [UUU]
md1 : active raid1 sdc2[3] sdb2[1] sda2[0]
126887936 blocks super 1.2 [3/3] [UUU]
bitmap: 0/1 pages [0KB], 65536KB chunk
md5 : active raid1 sdc7[3] sdb7[1] sda7[0]
244169728 blocks super 1.2 [3/3] [UUU]
bitmap: 0/2 pages [0KB], 65536KB chunk
md2 : active raid1 sdc3[3] sdb3[1] sda3[0]
195181568 blocks super 1.2 [3/3] [UUU]
bitmap: 1/2 pages [4KB], 65536KB chunk
md4 : active raid1 sdc6[3] sdb6[1] sda6[0]
97589248 blocks super 1.2 [3/3] [UUU]
md0 : active raid1 sdc1[3] sdb1[1] sda1[0]
19514368 blocks super 1.2 [3/3] [UUU]
unused devices: <none>
uname -a
Linux green 4.4.0-47-generic #68-Ubuntu SMP Wed Oct 26 19:39:52 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux
df -hT
Filesystem Type Size Used Avail Use% Mounted on
udev devtmpfs 63G 0 63G 0% /dev
tmpfs tmpfs 13G 746M 12G 6% /run
/dev/md2 ext4 184G 31G 144G 18% /
tmpfs tmpfs 63G 0 63G 0% /dev/shm
tmpfs tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs tmpfs 63G 0 63G 0% /sys/fs/cgroup
/dev/md0 ext4 19G 289M 17G 2% /boot
/dev/md3 ext4 92G 40G 48G 46% /cl
/dev/md5 ext4 230G 31G 187G 15% /sd
/dev/md4 ext4 92G 20G 68G 22% /pc
tan:/clbck nfs4 596G 169G 398G 30% /clbck
tan:/sdbck nfs4 596G 169G 398G 30% /sdbck
tmpfs tmpfs 13G 4.0K 13G 1% /run/user/275
/dev/sde1 ext3 2.7T 676G 1.9T 26% /archive
tmpfs tmpfs 13G 4.0K 13G 1% /run/user/286
/dev/sdd1 ext3 1.8T 1.6T 182G 90% /backupdisk
tmpfs tmpfs 13G 12K 13G 1% /run/user/277
tmpfs tmpfs 13G 0 13G 0% /run/user/283
tmpfs tmpfs 13G 4.0K 13G 1% /run/user/280
tmpfs tmpfs 13G 4.0K 13G 1% /run/user/285
tmpfs tmpfs 13G 0 13G 0% /run/user/299
tmpfs tmpfs 13G 0 13G 0% /run/user/1100
tmpfs tmpfs 13G 0 13G 0% /run/user/1685
lsscsi
[2:0:0:0] disk ATA WDC WD30EZRS-00J 0A80 /dev/sde
[3:0:0:0] disk ATA WDC WD2000FYYZ-0 1K03 /dev/sdd
[4:0:0:0] disk ATA INTEL SSDSC2BX80 0140 /dev/sda
[5:0:0:0] disk ATA INTEL SSDSC2BX80 0140 /dev/sdb
[6:0:0:0] disk ATA INTEL SSDSC2BX80 0140 /dev/sdc
lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 745.2G 0 disk
+-sda1 8:1 0 18.6G 0 part
│ L-md0 9:0 0 18.6G 0 raid1 /boot
+-sda2 8:2 0 121.1G 0 part
│ L-md1 9:1 0 121G 0 raid1 [SWAP]
+-sda3 8:3 0 186.3G 0 part
│ L-md2 9:2 0 186.1G 0 raid1 /
+-sda4 8:4 0 1K 0 part
+-sda5 8:5 0 93.1G 0 part
│ L-md3 9:3 0 93.1G 0 raid1 /cl
+-sda6 8:6 0 93.1G 0 part
│ L-md4 9:4 0 93.1G 0 raid1 /pc
L-sda7 8:7 0 233G 0 part
L-md5 9:5 0 232.9G 0 raid1 /sd
sdb 8:16 0 745.2G 0 disk
+-sdb1 8:17 0 18.6G 0 part
│ L-md0 9:0 0 18.6G 0 raid1 /boot
+-sdb2 8:18 0 121.1G 0 part
│ L-md1 9:1 0 121G 0 raid1 [SWAP]
+-sdb3 8:19 0 186.3G 0 part
│ L-md2 9:2 0 186.1G 0 raid1 /
+-sdb4 8:20 0 1K 0 part
+-sdb5 8:21 0 93.1G 0 part
│ L-md3 9:3 0 93.1G 0 raid1 /cl
+-sdb6 8:22 0 93.1G 0 part
│ L-md4 9:4 0 93.1G 0 raid1 /pc
L-sdb7 8:23 0 233G 0 part
L-md5 9:5 0 232.9G 0 raid1 /sd
sdc 8:32 0 745.2G 0 disk
+-sdc1 8:33 0 18.6G 0 part
│ L-md0 9:0 0 18.6G 0 raid1 /boot
+-sdc2 8:34 0 121.1G 0 part
│ L-md1 9:1 0 121G 0 raid1 [SWAP]
+-sdc3 8:35 0 186.3G 0 part
│ L-md2 9:2 0 186.1G 0 raid1 /
+-sdc4 8:36 0 1K 0 part
+-sdc5 8:37 0 93.1G 0 part
│ L-md3 9:3 0 93.1G 0 raid1 /cl
+-sdc6 8:38 0 93.1G 0 part
│ L-md4 9:4 0 93.1G 0 raid1 /pc
L-sdc7 8:39 0 233G 0 part
L-md5 9:5 0 232.9G 0 raid1 /sd
sdd 8:48 0 1.8T 0 disk
L-sdd1 8:49 0 1.8T 0 part /backupdisk
sde 8:64 0 2.7T 0 disk
L-sde1 8:65 0 2.7T 0 part /archive
-----Original Message-----
From: Reindl Harald [mailto:h.reindl@xxxxxxxxxxxxx]
Sent: Tuesday, February 28, 2017 1:23 AM
To: linux-raid@xxxxxxxxxxxxxxx
Subject: Re: GRUB warning after replacing disk drive in RAID1
Am 28.02.2017 um 00:37 schrieb Peter Sangas:
I have a RAID1 with 3 disks sda,sdb,sdc. After replacing sdc and
re-syncing it to the array I issued the following command to load
grub but I get this
warning:
grub-install /dev/sdc
Installing for i386-pc platform.
grub-install: warning: Couldn't find physical volume `(null)'. Some
modules may be missing from core image..
grub-install: warning: Couldn't find physical volume `(null)'. Some
modules may be missing from core image..
Installation finished. No error reported.
Does anyone know why I get this warning and how to avoid it
it's harmless and disappears after the resync finished
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