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Re: Two systems -- supposed to be the same, but booting with grub differ
From: |
Andrei Borzenkov |
Subject: |
Re: Two systems -- supposed to be the same, but booting with grub differently. What'd I miss? |
Date: |
Thu, 13 Apr 2017 20:17:06 +0300 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 |
13.04.2017 16:13, address@hidden пишет:
> Hi,
>
> I've got two machines. Both are supposed to be configured the same: Linux,
> with grub2 booting, with everything on a RAID-1 array.
>
> I read up on list posts, docs, etc and got both systems booting up OK, and
> everything seems to run fine.
>
> BUT ... "System 2" takes a very long time to boot -- it stalls at right after
> the Grub menu for up to 2 minutes, then continues to boot normally. OTOH,
> "System 1" continue boot immediately.
>
> I used "bootinfoscript" to look at the grub info for both systems.
>
> 2 things popped out at me:
>
> -- system 1's "/boot" partition is on a RAID array config'd as v1.0
> metadat; system 2's is v1.2
> -- system 1's got Grub2 installed in BOTH MBR & boot sector of both
> RAID disks; system 2's got it only installed in MBR.
>
> So a couple of questions:
>
> (a) how SHOULD grub2 be installed in this config? MBR &/or boot sector?
MBR. You actually cannot install grub2 in partition in this
configuration, at least using grub2 native tools.
> (b) whatever way it should be installed, how do I change the 'wrong on' to be
> correct?
>
Just install it in MBR. How to make it persist depends on your distribution.
> What did I miss or forget?
>
> JerryG
>
> p.s. Here's the bootinfo script output that I'm talking about for each
> system.
>
> (1) System1
> ------------------------
> cat /proc/mdstat
> Personalities : [raid1]
> md1 : active raid1 sda2[0] sbd2[1]
> 487205888 blocks super 1.2 [2/2] [UU]
> bitmap: 1/4 pages [4KB], 65536KB chunk
>
> md0 : active raid1 sbd1[1] sda1[0]
> 1048512 blocks super 1.0 [2/2] [UU]
> bitmap: 0/1 pages [0KB], 65536KB chunk
>
> unused devices: <none>
>
> mount | grep boot
> /dev/md0 on /boot type ext4 (rw,noatime,data=ordered)
>
>
> cat /root/RESULTS.txt
> Boot Info Script 0.75 [14 November 2016]
>
>
> ============================= Boot Info Summary:
> ===============================
>
> => Grub2 (v1.99-2.00) is installed in the MBR of /dev/sda and looks at
> sector
> 1 of the same hard drive for core.img, but core.img can not be found at
> this location.
> => Grub2 (v1.99-2.00) is installed in the MBR of /dev/sdb and looks at
> sector
> 1 of the same hard drive for core.img, but core.img can not be found at
> this location.
>
Could you make full output available (pastebin or similar)? What
distribution do you use? Could you send me content of post-MBR gap from
both sda and sdb (assuming it is 1MB - dd if=/dev/sda bs=1M count=1
of=sda.mbr)?
> sda1:
> __________________________________________________________________________
>
> File system: linux_raid_member
> Boot sector type: Grub2 (v1.99-2.00)
> Boot sector info: Grub2 (v1.99-2.00) is installed in the boot sector of
> sda1 and looks at sector 290367 of the same hard drive
> for core.img, but core.img can not be found at this
> location.
>
> sda2:
> __________________________________________________________________________
>
> File system: linux_raid_member
> Boot sector type: -
> Boot sector info:
>
> sdb1:
> __________________________________________________________________________
>
> File system: linux_raid_member
> Boot sector type: Grub2 (v1.99-2.00)
> Boot sector info: Grub2 (v1.99-2.00) is installed in the boot sector of
> sdb1 and looks at sector 290367 of the same hard drive
> for core.img, but core.img can not be found at this
> location.
>
> sdb2:
> __________________________________________________________________________
>
> File system: linux_raid_member
> Boot sector type: -
> Boot sector info:
>
> ------------------------
>
>
> (2) System 2
> ------------------------
> cat /proc/mdstat
> Personalities : [raid1]
> md0 : active raid1 sda1[0] sdb1[1]
> 1047552 blocks super 1.2 [2/2] [UU]
> bitmap: 0/1 pages [0KB], 65536KB chunk
>
> md1 : active raid1 sda2[0] sdb2[1]
> 975581888 blocks super 1.2 [2/2] [UU]
> bitmap: 1/8 pages [4KB], 65536KB chunk
>
> unused devices: <none>
>
> mount | grep boot
> /dev/md0 on /boot type ext4 (rw,noatime,data=ordered)
>
> cat /root/RESULTS.txt
> Boot Info Script 0.75 [14 November 2016]
>
>
> ============================= Boot Info Summary:
> ===============================
>
> => Grub2 (v1.99-2.00) is installed in the MBR of /dev/sda and looks at
> sector
> 1 of the same hard drive for core.img, but core.img can not be found at
> this location.
> => Grub2 (v1.99-2.00) is installed in the MBR of /dev/sdb and looks at
> sector
> 1 of the same hard drive for core.img, but core.img can not be found at
> this location.
>
> sda1:
> __________________________________________________________________________
>
> File system: linux_raid_member
> Boot sector type: -
> Boot sector info:
>
> sda2:
> __________________________________________________________________________
>
> File system: linux_raid_member
> Boot sector type: -
> Boot sector info:
>
> sdb1:
> __________________________________________________________________________
>
> File system: linux_raid_member
> Boot sector type: -
> Boot sector info:
>
> sdb2:
> __________________________________________________________________________
>
> File system: linux_raid_member
> Boot sector type: -
> Boot sector info:
>
> ------------------------
>
>
> _______________________________________________
> Help-grub mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/help-grub
>
- Two systems -- supposed to be the same, but booting with grub differently. What'd I miss?, my59stang, 2017/04/13
- Re: Two systems -- supposed to be the same, but booting with grub differently. What'd I miss?,
Andrei Borzenkov <=
- Re: Two systems -- supposed to be the same, but booting with grub differently. What'd I miss?, my59stang, 2017/04/13
- Re: Two systems -- supposed to be the same, but booting with grub differently. What'd I miss?, my59stang, 2017/04/13
- Re: Two systems -- supposed to be the same, but booting with grub differently. What'd I miss?, Andrei Borzenkov, 2017/04/13
- Re: Two systems -- supposed to be the same, but booting with grub differently. What'd I miss?, my59stang, 2017/04/13
- Re: Two systems -- supposed to be the same, but booting with grub differently. What'd I miss?, Andrei Borzenkov, 2017/04/13
- Re: Two systems -- supposed to be the same, but booting with grub differently. What'd I miss?, my59stang, 2017/04/13
- Re: Two systems -- supposed to be the same, but booting with grub differently. What'd I miss?, Andrei Borzenkov, 2017/04/13
Re: Two systems -- supposed to be the same, but booting with grub differently. What'd I miss?, Andrei Borzenkov, 2017/04/15