From: Neil Brown <neilb@suse.de>
To: Carlos Mennens <carloswill@gmail.com>
Cc: Mdadm <linux-raid@vger.kernel.org>
Subject: Re: RAID1 On 3 Drives
Date: Sun, 14 Mar 2010 08:26:49 +1100 [thread overview]
Message-ID: <20100314082649.187dae9a@notabene.brown> (raw)
In-Reply-To: <d80f793f1003131306i1eb1d839w5552e048001e6193@mail.gmail.com>
On Sat, 13 Mar 2010 16:06:38 -0500
Carlos Mennens <carloswill@gmail.com> wrote:
> I was told by my distributions Wiki page that Grub doesn't support
> RAID 5 or RAID 6 so I would need to create a volume with three disks
> and set the level to RAID 1:
>
> # mdadm --create /dev/md1 --level=1 --raid-devices=3 /dev/sda1
> /dev/sdb1 /dev/sdc1 --spare-devices=1 /dev/sdd1
>
> Is this possible to mirror three identical drive partitions? I was
> talking to some co-workers and was told that I could only pair two
> drives on RAID 1.
Your co-workers are wrong, at least for md raid. With md, a RAID1 can have
any number of devices from 1 upwards - the limit varies in different
situations but is at least 28.
Try it and see.
NeilBrown
>
> Can anyone please help me understand this?
> --
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next prev parent reply other threads:[~2010-03-13 21:26 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-13 21:06 RAID1 On 3 Drives Carlos Mennens
2010-03-13 21:21 ` Majed B.
2010-03-13 21:24 ` Carlos Mennens
2010-03-14 21:09 ` Luca Berra
2010-03-13 21:45 ` Neil Brown
2010-03-13 21:26 ` Neil Brown [this message]
2010-03-13 21:31 ` Majed B.
2010-03-13 21:50 ` Neil Brown
2010-03-14 3:30 ` Majed B.
2010-03-14 1:22 ` thib
-- strict thread matches above, loose matches on Subject: below --
2010-03-13 22:30 Joachim Otahal
2010-03-13 23:18 ` Carlos Mennens
2010-03-13 23:50 ` Bill Davidsen
2010-03-15 12:30 ` Carlos Mennens
2010-03-15 12:48 ` Majed B.
2010-03-15 14:47 ` Carlos Mennens
2010-03-15 16:05 ` Majed B.
2010-03-16 1:46 ` Keld Simonsen
2010-03-20 16:08 ` Bill Davidsen
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