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Jarry wrote: |
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> Hi, |
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> |
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> I'm going to re-install gentoo on a small hobby-server and because |
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> I need both redundancy and flexibility, I thought in addition to |
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> raid1 (2x 160GB ata-disk) this time I would also use lvm2: |
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> |
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> /dev/md0 /boot (~50MB) |
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> /dev/md1 / (2GB) |
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> /dev/md2 <swap> (2GB) |
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> /dev/md3 lvm2 (rest for /var /tmp /usr /opt /chroot /home) |
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That's how I typically setup my small office servers. I create about 6 |
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LVM volumes during the initial installation. The downside is that it |
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makes recovery more difficult (additional volumes that have to be |
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mounted). I've also done a server where I made the root volume larger |
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(16-24GB) and didn't bother with LVM2 during the initial install. |
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I also have a server where I did something slightly trickier with |
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RAID1/LVM2: |
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hda1+hdc1 -> /dev/md0 /boot (~128MB) |
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hda2+hdc2 -> /dev/md1 (swap) (2GB) |
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hda3+hdc3 -> /dev/md2 / (root) (16GB) |
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hda4 -> /music (rest of disk), non-redundant |
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hdc4 -> /musicbackup (rest of disk, non-redundant) |
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Every few days (whenever I add new music), I update the contents of |
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/musicbackup with what is stored on /music, then unmount /musicbackup |
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again. So, accidental deletions in my /music folder become easy to |
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recover from. And I don't care if my music is offline for a few |
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hours/days before I can swap in a new drive. |
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> Is this generaly advisable solution (lvm2 over raid1), or is there |
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> some risk in using raid1 together with lvm2 ? |
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The only issue I've heard *rumor* of is that 2.6.14 kernels may not be |
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playing nicely with LVM2. (I'm using 2.6.13 on my servers at the |
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moment.) One of these days, I'll update to 2.6.14 and find out for sure. |
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> One more question concerning partition type: |
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> If I want to use raid1, I have to set all those 2x4 (hda+hdc) primary |
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> partitions as type fd (raid autodetect). Is it not problem later for |
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> lvm2 when preparing and creating volume-group? Because lvm-guide says |
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> something about setting partition type to 8e (linux lvm), which I can |
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> not do, if I want to use raid1... |
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All partitions end up as "fd", because the raid arrays need to be built |
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prior to LVM2 getting a look at them. |
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-- |
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