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On Tuesday 15 Oct 2013 20:28:46 Paul Hartman wrote: |
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> On Tue, Oct 15, 2013 at 2:34 AM, Mick <michaelkintzios@×××××.com> wrote: |
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> > Hi All, |
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> > |
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> > I haven't had to set up a software RAID for years and now. I want to set |
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> > up two RAID 1 arrays on a new file server to serve SBM to MSWindows |
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> > clients. The first RAID1 having two disks, where a multipartition OS |
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> > installation will take place. The second RAID1 having two disks for a |
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> > single data partition. |
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> > |
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> > From what I recall I used mdadm with --auto=mdp, to create a RAID1 from 2 |
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> > disks, before I used fdisk to partition the new /dev/md0 as necessary. |
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> > All this is lost in the fog of time. Now I read that these days udev |
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> > names the devices/partitions, so I am not sure what the implication of |
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> > this is and how to proceed. |
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> > |
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> > What is current practice? Create multiple /dev/mdXs for the OS |
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> > partitions I would want and then stick a fs on each one, or create one |
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> > /dev/md0 which thereafter is formatted with multiple partitions? |
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> > Grateful for any pointers to resolve my confusion. |
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> |
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> One of the best resources is the kernel RAID wiki: |
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> https://raid.wiki.kernel.org/ |
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|
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Thanks Paul! It seems that after a cursory look, both ways of partitioning a |
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RAID-1 are still available: |
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|
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https://raid.wiki.kernel.org/index.php/Partitioning_RAID_/_LVM_on_RAID |
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|
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======================================================== |
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# df -h |
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Filesystem Size Used Avail Use% Mounted on |
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/dev/md2 3.8G 640M 3.0G 18% / |
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/dev/md1 97M 11M 81M 12% /boot |
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/dev/md5 3.8G 1.1G 2.5G 30% /usr |
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/dev/md6 9.6G 8.5G 722M 93% /var/www |
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/dev/md7 3.8G 951M 2.7G 26% /var/lib |
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/dev/md8 3.8G 38M 3.6G 1% /var/spool |
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/dev/md9 1.9G 231M 1.5G 13% /tmp |
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/dev/md10 8.7G 329M 7.9G 4% /var/www/html |
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========================================================= |
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|
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and: |
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mdadm --create --auto=mdp --verbose /dev/md_d0 --level=mirror --raid-devices=2 |
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/dev/sda /dev/sdb |
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which is thereafter partitioned with fdisk. This is the one I have used in |
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the past. |
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|
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|
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Which one is preferable, or what are the pros & cons of each? |
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|
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-- |
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Regards, |
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Mick |
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