Thanks Mike,
I have a more fundamental issue now, the installer has named my former
sda (in a one hdd system) to sdc.
My sda should be my 1Tb former OpenSuse , and the two new drives should
be sdb and sdc.
Is this just a case of correcting where it is plugged in?
I want my sda to be my OS and general storage, and sdb and sdc in RAID
to store data from my photography.
So install options delete the whole sda and accept LVM then partition
1Gb for GRUB
at what point will I fire up mdadm?
Cheers
Andrew
On 20/05/18 10:27, Mike O'Connor wrote:
Hi
I suggest the following.
1. Do not use ZFS unless you have ECC ram
2. btrfs has real issues in a number of area so unless you are very
experienced I would not use it.
The Ubuntu installer supports creating both mdadm raid and LVM so maybe
the following.
1. Partition both drives with 2 partitions
1.1 BOOT at about 1G (I know people say its not really needed now
but I still feel its easier to fix things if you have issues with one)
1.2 All the rest of the drive
2. Create Raids of the partitions as raid 1
3. Set the partition type on the BOOT and directory
4. Create Volume Group on the largest partition
5. Create Logical Volumes for ROOT, SWAP and if you really want HOME
6. Set the partition type on the LV ROOT, SWAP and HOME
So why do it this way ?
Well LVMs give a lot of options which as not available if there not
there. This site has only a very simple example but give it a read
http://tldp.org/HOWTO/LVM-HOWTO/benefitsoflvmsmall.html
My 2 cents worth.
Mike
On 20/5/18 9:35 am, Andrew Greig wrote:
Thanks Andrew,
Drives are in and Ubuntu 18.04 is installing, I am offered an LVM
option will that mess with RAID?
One other thing, will choosing btrfs orZFS just utilise the matched
drives as a RAID pair?
If I go XFS, as my file system for all drives, then will I need the
install to complete, then run mdadm to set the RAID?
I am so glad I am fresh for this.
Regards
Andrew Greig
On 20/05/18 00:21, Andrew Pam wrote:
On 20/05/18 00:04, Andrew Greig via luv-main wrote:
What should I do about partitioning? Should I use hard partitions say,
20Gb for the /root, should I use a /boot partition or just use the MBR?
You don't really need a separate /boot partition any more unless you
have an older BIOS that can only boot from the first part of the drive.
Is mdadm a part of this process or does it get involved later ? ZFS for
the pair of drives?
If you use ZFS or btrfs, you probably don't want to use mdadm (software
RAID) as well. Better to take advantage of the filesystem-level
mirroring. If you use another filesystem (such as XFS, which is what I
use on my 4T RAID-1 mirror on my desktop workstation) you will need to
install and set up mdadm first, yes.
Do I have to jump through hoops in Ubuntu to watch an MP4 or a
Matroska video?
Not if you select the "use third-party proprietary drivers and codecs"
checkbox during the install - note that it's off by default, though. Or
you can install VLC, which should come with all the codes you need.
Hope that helps,
Andrew
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