From: Eric Wong <e@80x24.org>
To: Alberto Bursi <bobafetthotmail@gmail.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: raid1 with several old drives and a big new one
Date: Fri, 31 Jul 2020 10:06:28 +0000 [thread overview]
Message-ID: <20200731100628.GA18568@dcvr> (raw)
In-Reply-To: <6d29319f-301e-c1d2-9674-b39619356ae7@gmail.com>
Alberto Bursi <bobafetthotmail@gmail.com> wrote:
> On 31/07/20 02:16, Eric Wong wrote:
> > Say I have three ancient 2TB HDDs and one new 6TB HDD, is there
> > a way I can ensure one raid1 copy of the data stays on the new
> > 6TB HDD?
> >
> > I expect the 2TB HDDs to fail sooner than the 6TB HDD given
> > their age (>5 years).
> >
>
> I'm not sure what is the problem, ok maybe the drives are old and are more
> likely to fail, but why would more than one drive fail at once?
Why wouldn't they? Otherwise there'd be no reason for RAID6 to
exist over RAID5. Recovery puts more stress on the remaining
drives and increases the likelyhood of another drive in a pool
failing. I've seen HW RAID5 arrays lost like like this in a
previous life (I didn't manage to convince the other sysadmins
to use RAID6 :<).
next prev parent reply other threads:[~2020-07-31 10:06 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-31 0:16 raid1 with several old drives and a big new one Eric Wong
2020-07-31 2:57 ` Chris Murphy
2020-07-31 3:22 ` Eric Wong
2020-07-31 3:35 ` Chris Murphy
2020-08-01 9:05 ` Roman Mamedov
2020-07-31 8:29 ` Alberto Bursi
2020-07-31 10:06 ` Eric Wong [this message]
2020-07-31 16:13 ` Adam Borowski
2020-08-01 3:40 ` Zygo Blaxell
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200731100628.GA18568@dcvr \
--to=e@80x24.org \
--cc=bobafetthotmail@gmail.com \
--cc=linux-btrfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox