Re: [gentoo-user] Hard drive noise

Rich Freeman <rich0@g.o> wrote:

> On Sat, Dec 19, 2015 at 2:56 AM,  <covici@××××××××××.com> wrote:
> >
> > I was never able to get either zfs or btrfs to work correctly, zfs was
> > very vulnerable -- I forgot to export a zfs on a usb drive and got an
> > enless loop of processes untill I rebooted.  Btrfs never did work for
> > me, I created a pool,  copied my root file system, usr and var into
> > ssubvolumes, and copied my files, but when I would boot into it,
> > everything was messed up, processes thought files were missing, very
> > strange.  So, how did you set up either one of those -- I would love to
> > use it because I have ssds and I don't want to rely on their firmware
> > either.
>
> Well, I don't have much personal experience with zfs, but the ZFS on
> Linux lead is a Gentoo dev, so you're in good company there all the
> same.  I personally use btrfs.
>
> The obvious caveat is that it is still relatively experimental, and
> raid5/6 is VERY experimental.  I plan to convert to raid5/6 at a
> future date but am staying away from it for now (and a selling point
> of btrfs is that reshaping in-place is easy).
>
> I can't really vouch for what went wrong with your migration.  It
> could be anything from a failure to preserve all your file attributes
> to something with btrfs itself or your bootloader config/etc.  It
> isn't hard to do a new install in btrfs though, and you can always
> mess with it in a VM, or even mess with doing migrations in a VM.
>
> My btrfs install notes are at:
> https://docs.google.com/document/d/1VJlJyYLTZScta9a81xgKOIBjYsG3_VfxxmUSxG23Uxg/edit?usp=sharing
> (I still plan to merge this stuff into the handbook.  Maybe a good
> holiday project...  Oh, and if it isn't already obvious anybody can
> add comments and half this list seems to have already done so.)
>
> Oh, for a boot image I tend to use system rescue CD since it has all
> the necessary userspace and is gentoo-based (and you can always emerge
> --sync and install whatever you need inside it).  I tend to use the
> alternate kernel since it is newer, and with btrfs newer tends to be
> better.  In production I'm currently on 3.18 eyeing an upgrade to 4.1.
> I tend to stay on the latest longterm, but not when they are first
> declared as longterm.  That seems to be the sweet spot for getting
> btrfs features and bugfixes, but not getting as many of the
> regressions.  I use grub2/dracut to boot, and that is in my guide.
>
> If you follow those notes for a stage3 install it should "just work."
> If you want to mess around I suggest just doing a vanilla install on a
> VM once to validate that it works for you and then tweak from a
> position of strength.

Thanks.  I will check out your notes and figure out something -- it was
definitely strange.  I have a vm I can play with -- its older, but I can
bring it up to date and see what happens.

Thanks again.

-- 
Your life is like a penny.  You're going to lose it.  The question is:
How do
you spend it?

         John Covici
         covici@××××××××××.com