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From: Alan McKinnon <alan.mckinnon@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Hard drive storage questions
Date: Wed, 29 Apr 2015 08:13:41 +0200	[thread overview]
Message-ID: <55407695.7000808@gmail.com> (raw)
In-Reply-To: <20150428162448.160e1683@digimed.co.uk>

On 28/04/2015 17:24, Neil Bothwick wrote:
> On Tue, 28 Apr 2015 17:01:49 +0200, Alan McKinnon wrote:
> 
>> When you use only LVM for this and nothing else, you have a high risk of
>> losing everything if one disk fails. Why? Because LVM decides itself
>> which extent it will put data on. Maybe a whole file is on one disk,
>> maybe it's spread across two, because the software is designed so that
>> you don't have to be concerned with that. The only thing that LVM does
>> is expand your storage space as a single volume and make it easier to
>> shuffle things around without having to backup/repartition/restore.
> 
> An alternative is to create a new volume group on the new disk and mounts
> PVs at various points in your home directory. That way you get the extra
> space and much of the flexibility without the risk of a failure on a
> single drive taking out data on both. However, if you are concerned about
> data loss, you should be using RAID t a minimum, preferably with an error
> detecting filesystem.


I've used that scheme myself in the past. You do get the increased space
but you don't get much in the way of flexibility. And it get COMPLICATED
really quickly.

To get around the situation of one drive almost full and the other
having lots of space, folks often use symlinked directories, which you
forget about and no-one else can figure out what you did...

It all smacks of the old saw:

For any non-trivial problem, there is always at least one solution that
is simple, elegant, and wrong.



-- 
Alan McKinnon
alan.mckinnon@gmail.com



  parent reply	other threads:[~2015-04-29  6:13 UTC|newest]

Thread overview: 59+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-28  8:39 [gentoo-user] Hard drive storage questions Dale
2015-04-28 14:49 ` Francisco Ares
2015-04-28 15:01 ` Alan McKinnon
2015-04-28 15:24   ` Neil Bothwick
2015-04-28 17:38     ` Rich Freeman
2015-04-28 18:11       ` Neil Bothwick
2015-04-28 18:31         ` Rich Freeman
2015-04-28 18:41           ` Neil Bothwick
2015-04-28 22:02     ` [gentoo-user] " walt
2015-04-29  1:24       ` Rich Freeman
2015-04-29  6:20       ` Alan McKinnon
2015-04-29 14:31         ` Grant Edwards
2015-04-29  6:13     ` Alan McKinnon [this message]
2015-04-29  7:52       ` [gentoo-user] " Neil Bothwick
2015-05-04  7:39         ` Dale
2015-05-04  7:46           ` Neil Bothwick
2015-05-04  8:13             ` Mick
2015-05-04  8:26               ` Dale
2015-05-04  8:23             ` Dale
2015-05-04 10:31               ` Neil Bothwick
2015-05-04 10:40                 ` Dale
2015-05-04 11:26                   ` Neil Bothwick
2015-05-09 10:56                     ` Dale
2015-05-09 12:59                       ` Rich Freeman
2015-05-09 14:46                         ` Todd Goodman
2015-05-09 18:16                           ` Rich Freeman
2015-05-04 11:35                 ` Rich Freeman
2015-05-04 18:42                   ` Nuno Magalhães
2015-05-05  6:41                     ` Alan McKinnon
2015-05-05 10:56                     ` Rich Freeman
2015-05-05 11:33                       ` Neil Bothwick
2015-05-05 12:05                         ` Mick
2015-05-05 12:21                           ` Neil Bothwick
2015-05-05 12:39                             ` Mick
2015-05-05 12:53                             ` Rich Freeman
2015-05-05 21:50                               ` Neil Bothwick
2015-05-05 22:21                                 ` Bill Kenworthy
2015-05-05 22:33                                   ` Bill Kenworthy
2015-05-04 10:57               ` Alan Mackenzie
2015-04-28 15:02 ` Rich Freeman
2015-05-04  7:23 ` Dale
2015-05-05  3:01   ` Walter Dnes
  -- strict thread matches above, loose matches on Subject: below --
2018-11-09  1:16 Dale
2018-11-09  1:31 ` Jack
2018-11-09  1:43   ` Dale
2018-11-09  2:04     ` Andrew Lowe
2018-11-09  2:07     ` Bill Kenworthy
2018-11-09  8:39       ` Neil Bothwick
2018-11-09  2:29 ` Rich Freeman
2018-11-09  8:17   ` Bill Kenworthy
2018-11-09 13:25     ` Rich Freeman
2018-11-09  9:02   ` J. Roeleveld
2018-11-11  0:45   ` Dale
2018-11-11 21:41     ` Wol's lists
2018-11-11 22:17       ` Dale
2018-11-09  9:24 ` Wols Lists
2015-04-27  7:41 Dale
2015-04-28 18:25 ` Daniel Frey
2015-04-28 21:23   ` Dale

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