[kwlug-disc] Bundling HD's. LVM vs mdadm vs ???

L.D. Paniak ldpaniak at fourpisolutions.com
Thu Apr 11 10:31:51 EDT 2013


I agree with the build/patch comment.  Fortunately, there are pre-built
ZFS packages for many distros.  The PPA for ubuntu is especially
well-maintained:

https://launchpad.net/~zfs-native/+archive/stable


On 04/11/2013 10:17 AM, Chris Irwin wrote:
> I put my trust behind on ext4 on LVM on a mdadm RAID 1 mirror. Every
> distro supports those (though optionally, in Ubuntu's case), so your
> recovery options are open.
>
> Using something like ZFS (or eventually, BTRFS) would be nice, if only
> for checksums to verify the integrity of your data, which we don't get
> now. That said, I'd never rely on a file system I have to patch in or
> build myself. I want smarter people than me to be worrying about that
> part.
>
>
> On Thu, Apr 11, 2013 at 9:01 AM, unsolicited <unsolicited at swiz.ca
> <mailto:unsolicited at swiz.ca>> wrote:
>
>     I'm running out of backup space, so I'm probably going to buy a
>     larger drive, and move a current drive into another computer -
>     expecting to bundle it with the drive already there into a single
>     logical presentation. (Add 4TB, move 2TB -> 2TB + 2TB = 4TB.)
>
>     I don't 'do' RAID (at least at home, where high availability isn't
>     an issue), and mistrust striping - lose 1 drive, both be gone. I
>     prefer to say 'this' amount of space for 'this' purpose, so when I
>     run out of space I'm aware of and address the issue.
>
>     (Presumably a worst case scenario for such bundling upon failure
>     is losing one file - the one that crosses physical drives.
>     Correct, even today?)
>
>     I've known for some time LVM is out there, just never needed it.
>     There's also mdadm ('LINEAR') [Which I gather LVM calls upon.]
>
>     Any particular pros / cons / preferences / suggestions / thoughts
>     for bundling multiple drives into a single logical drive?
>
>     -----
>
>     I'm guessing the only reasonable drive out there at the moment is
>     a WD Black - (5 yr warranty, 7200, SATA3, availability / stock
>     levels). Counter suggestions?
>
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>
>
>
>
> -- 
> Chris Irwin
> <chris at chrisirwin.ca <mailto:chris at chrisirwin.ca>>
>
>
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