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Hello, |
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> |
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So after readaing quite a bit about ZFS, I still have some simple |
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question(s). Can you install ZFS on a single drive? Does that make sense |
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or is it "illogical/dumb" to do so? |
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Is the latest version of SystemRescue the best media to use to format |
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disks with ZFS? Caveats? |
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Last, after looking at the thread from 17Sep2013, I have culled. |
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These bookmarks as the best resources to follow (any others?) : |
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http://wiki.gentoo.org/wiki/ZFS |
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|
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Just emerge zfs and its depndancies. Special/additional Flags |
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recommended but not in the aforementioned resource listing? |
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turn off readahead. ZFS' own readahead and the kernel's clash - badly. |
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set it with blockdev to 8 (for example). Doesn't turn it off. Just makes |
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it none-obstrusive. |
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Turn off kernel's readahead for a visible performance boon. |
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use noop as io-scheduler. |
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> Has anyone tried hardened and ZFS together? |
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I did - I had some problems, but I'm not sure if they were caused by the |
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combination of ZFS and hardened. There were some issues updating kernel and |
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ZFS (most likely due to ZFS on root and me using ~arch hardened-sources and |
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the live ebuild for zfs). There are some hardened options that are known to |
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be not working (constify was one of them but that should be patched now). I |
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think another one was HIDESYM. |
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There is a (more or less regularly updated blogpost by prometheanfire |
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(installation guide zfs+hardened+luks [1]). So you could ask him or ryao (he |
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seems to support hardened+zfs at least to a certain degree). |
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Very interesting! What I want to experiment with is Pentoo on ZFS and then |
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downloading all the sources to create a secure gentoo installation |
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(hardened)_ by using Pentoo-amd64-2013.0_RC1.9.iso as the starting point. |
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Since the pentoo-installer script does not offer ZFS (yet), I thought I'd |
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just use SystemRescue (systemrescuecd-x86-3.8.1.iso) to set up ZFS? I do not |
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need luks, for this test system. |
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I have recently stopped using the option to |
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built ZFS into the kernel as I ran into problems with vdevs reported as |
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corrupt on the system I was trying this on. They weren't corrupt and |
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mounted fine in System Rescue Cd with modules, and the problem |
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disappeared when I switched to modules. |
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Plan carefully how you are going to create the vdev's before you add |
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them to a pool. Precisely my point, on a single 2T drive, or should |
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I add (required) a second 2T drive for this experiment. After I get |
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this to work, I have a 4 drive system to set up for testing...... |
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http://wiki.illumos.org/display/illumos/ZFS+and+Advanced+Format+disks |
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Ok, so I have a single 2T seagate, or a pair of seagate 2T or 4 Green |
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2T WD drives to use for testing. |
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I just thoght a single drive rig would be fastest until I correct all |
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of the missteps (if it can go wrong in an install, I'll find it). |
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Just do ashift=12 and you're good to go. |
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So to recoup, my twist is to use the latest Pentoo install media, |
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becuase it is streamlined and yeilds a hardened system on top |
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of ZFS. |
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Anyone, care to splice in comments, suggestions or clarifications before |
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I invest some days in this venture? |
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curiously, |
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James |