Am 14.04.2017 um 17:01 schrieb linuxknight:
David thanks for this additional follow-up. I was mistaken about the
LSI card, it was actually a SiL 3124. The OS didnt see the raid as
one drive, so its another one of these fake raid cards. I did get a
good image.so Im going to re-os this weekend and use the software raid
method.
One last question, is it acceptable to let graphical installers setup
the software raid for me or should I use one disk and create a raid
mirror later once the OS is setup?
the machine in front of me as installed 2011 with Fedora 9, is currently
on Fedora 25 and was installed with Anaconda since it works also as
desktop - for RAID1 a no-brainer if the installer supports it (the new
Fedora and RHEL Anaconda is horrible)
just disable any raid functionality on the mainboard so that the prots
are pure SATA ports (on HP ProLiant the controller at every reboot
whines that it is unconfigured when done right)
[root@srv-rhsoft:~]$ cat /proc/mdstat
Personalities : [raid1] [raid10]
md0 : active raid1 sdd1[7] sdc1[4] sda1[6] sdb1[5]
511988 blocks super 1.0 [4/4] [UUUU]
md2 : active raid10 sdd3[7] sdc3[4] sdb3[5] sda3[6]
3875222528 blocks super 1.1 512K chunks 2 near-copies [4/4] [UUUU]
md1 : active raid10 sdd2[7] sdc2[4] sda2[6] sdb2[5]
30716928 blocks super 1.1 512K chunks 2 near-copies [4/4] [UUUU]
unused devices: <none>
[root@srv-rhsoft:~]$ df
Dateisystem Typ Größe Benutzt Verf. Verw% Eingehängt auf
/dev/md1 ext4 29G 6,9G 22G 24% /
/dev/md0 ext4 485M 34M 448M 7% /boot
/dev/md2 ext4 3,6T 2,3T 1,3T 64% /mnt/data
On Fri, Apr 14, 2017 at 12:43 AM, David C. Rankin
<drankinatty@xxxxxxxxxxxxxxxxxx> wrote:
On 04/12/2017 10:36 AM, linuxknight wrote:
Thank you Reindl, Using your method would I be able to apply this IMG
file to a fresh raid1 mirror and still have it be bootable?
The reason I ask is I was looking at this guide,
https://www.data-medics.com/forum/how-to-clone-a-hard-drive-with-bad-sectors-using-ddrescue-t133.html
It has a method to transfer drive to drive. I was thinking I would
create the fresh RAID mirror on the dedicated LSI card, then ddrescue
possibly bad drive to the new raid mirror. Is this a bad idea?
Take the dd advise, but... you initially indicated:
<quote>
I was moving a server with a raid1 configuration,
controlled by a Intel Corporation 82801 SATA RAID Controller
</quote>
Now you are saying
<quote>
It has a method to transfer drive to drive. I was thinking I would
create the fresh RAID mirror on the dedicated LSI card
</quote>
Note: the Intel and LSI cards may not have compatible RAID metadata. (That is
one of the major benefits of using linux-raid (software RAID) you are not
constrained by differing hardware RAID specifications.)
You also mention "to a fresh raid1 mirror and still have it be bootable?" If
you image the drive with dd, the mbr or bootloader will still be present on in
the image and on the drive, so as long as you can tell the OS to boot from
that drive you should be fine (as long as the controller can access the
information)
A good general howto on setting up linux-raid is
https://wiki.archlinux.org/index.php/RAID
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