From: David Brown <david.brown@hesbynett.no>
To: linux-raid@vger.kernel.org
Subject: Re: additional feature for linear
Date: Sat, 17 Sep 2011 17:47:37 +0200 [thread overview]
Message-ID: <j52fep$jj2$1@dough.gmane.org> (raw)
In-Reply-To: <CAC_HdUrFADb1G-5cos4foKohv8B=B0-pA=O8nbGnSX4z7mWcKg@mail.gmail.com>
On 17/09/11 17:32, Henti Smith wrote:
> On Sat, Sep 17, 2011 at 5:20 PM, Jérôme Poulin<jeromepoulin@gmail.com> wrote:
>> On 2011-09-17, at 03:14, Henti Smith<henti@geekware.co.za> wrote:
>>
>>> Would it not be possible to add functions to linear mode to mark this
>>> missing chunks as "bad blacks" and let the FS deal with it as such.
>>
>> Linux RAID can already deal with such a problem IIRC but if the
>> filesystem superblock is missing or directory entries, you ain't going
>> no where. This kind of feature would require filesystem knowledge of
>> where the RAID split the device and would be better suited to a FS
>> like BTRFS which mirror superblock and metadata without any Linux
>> RAID.
>
> Hi Jérôme
>
> Thanks for the reply. I though BTRFS would be a good option as well,
> but they don't seem to understand what I'm looking for :)
>
> I have found a fuse base FS that seems to do this, so will play with that.
>
> It's called http://romanrm.ru/en/mhddfs and seems to do what I need it
> to do so will test :)
>
> Thanks again for replying.
>
> Henti
That looks like an interesting idea, and would be particularly useful if
you've already got several disks with filesystems and want to join them
together. However, I would never consider it for a /new/ setup. The
price of disk space is so low that I never again expect to set up a
computer without raid, unless it is a laptop with only space for one
disk, or a machine using some nameless inferior operating system that
doesn't support proper raid. Certainly if you are thinking of putting
three disks in a machine then raid10,far would be the natural choice, or
raid5 if you want a little more space for your pennies.
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next prev parent reply other threads:[~2011-09-17 15:47 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-17 7:12 additional feature for linear Henti Smith
2011-09-17 15:03 ` David Brown
2011-09-17 15:20 ` Jérôme Poulin
2011-09-17 15:32 ` Henti Smith
2011-09-17 15:47 ` David Brown [this message]
2011-09-20 0:28 ` RAID1 with MBR and GPT fails to auto-assemble during boot Jim Schatzman
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