#arpnetworks/ 2015-01-16,Fri

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WhoWhatWhen
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mercutiohttp://www.neowin.net/news/moving-the-steam-folder-on-linux-is-causing-users-entire-file-systems-to-be-deleted
classy
[14:01]
m0undsquality [14:09]
BryceBotThat's what she said!! [14:09]
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mercutiomaybe linux needs something like android permissions
applications can write to their own directory, can write to network etc etc.
[14:48]
staticsafeSELinux [14:49]
mercutiodoes that do it?
does steam support it?
[14:49]
staticsafeSELinux can do that yeah, Steam probably doesn't support it [14:49]
mercutio"selinux prevents steam from starting up" [14:50]
staticsafeheh [14:50]
mercutiothe alternative is to not use steam at all [14:50]
staticsafeSELinux is really hard to configure properly [14:50]
mercutiodamn
ubuntu is doing a bit with apparmor
but none of these things seem standardised for external applications
[14:51]
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RandalSchwartzmore zfs puzzlement
I'm wondering if I can migrate from a classic mirror to a raidz
[15:41]
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mercutioyou have to create a new pool
if you want to shift from two drive mirror to 3 way raidz you can disconnect one of the mirrored drives, and create a raidz array with a missing drive afaik
on the other two drives
transfer the data
then take the first disk and put it in
i did raidz to mirrored though so i'm not altogether sure.
from 3 drives to 4, without having enough sata ports for all the drives at once rather than not enough drives.
i'd normally recommend just going to a pair of mirrored drives though
err two pairs
unless it's just bulk storage, and then people tend to want to jump up to raidz2
raidz with 2 3 drive pairs is pretty good though
it's pretty much a major pita doing the transfer
[16:13]
RandalSchwartzso I created zroot2 on my SSDs, and am using zxfer to do the mirror
what's the easiest way to boot off the ssds later?
just edit /boot/loader.conf ?
[16:21]
mercutiowhat's zxfer [16:22]
RandalSchwartzit's a nice wrapper around zfs send/recv [16:22]
mercutioahh
you can just do attach to go from one drive to two
[16:22]
RandalSchwartzso zroot2/zroot is a clone of zroot [16:22]
mercutioi see
i don't do zfs root
because i use linux with zfs ;)
in linux you can easily do partitions with zfs
so you can have a separate pool for bootup/system from data
just using beginning of drives
so if shifting from 2 to 3 ssd's, you could just do 3 way mirror.
for systerm, and then raidz for data
ssd's i can understand wanting to do raidz :)
i am pretty sure solaris doesn't support raidz root
you may want to check that freebsd does actualyl support it
[16:23]
RandalSchwartzthe probelm is the ssds aren't the same size as the currnt /
so I need to use send/recv to move the data
but then I'm not sure how to get it to boot that
[16:25]
mercutioi see, and then you need to make it bootable. [16:25]
RandalSchwartzI should probably simulate all this in a virtualbox :) [16:25]
mercutioare you going from hard-disk to ssd? [16:25]
RandalSchwartzyes [16:25]
mercutio2 hard-disks to 3 ssds? [16:26]
RandalSchwartz2 hard disks to 2 ssds [16:26]
mercutiooh i thought you were talking about raidz [16:26]
RandalSchwartzyes. raidz works just fine with two drives
better than mirroring :)
raidz2 needs three drives
[16:26]
mercutiohow's it better than mirroring? [16:26]
RandalSchwartzno write hole [16:26]
mercutiohuh? [16:26]
RandalSchwartz.. http://raid-recovery-guide.com/raid5-write-hole.aspx [16:27]
mercutioraid1 doesn't have write hole [16:27]
RandalSchwartzthey disagree [16:28]
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mercutiowell raidz is definitely not designed for two disks
http://blog.pascalj.com/article/migrate-a-freebsd-server-with-a-zfs-root-filesystem/
does that help/
[16:29]
RandalSchwartzahh... I might have been misled then [16:33]
mercutiogpart bootcode -b /mnt/boot/pmbr -p /mnt/boot/gptzfsboot -i 1 ada0
that seems to be the main thing i had no idea about
[16:33]
RandalSchwartzthat's just to make sure the bootloader knows about zfs
not sure why that's not the default
maybe it is now
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