From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Greaves Subject: Re: raid1 on HDD + RAM ? Date: Tue, 30 Sep 2008 18:09:57 +0100 Message-ID: <48E25D65.2010208@dgreaves.com> References: <20080930174926.5fdad7f1@szpak> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20080930174926.5fdad7f1@szpak> Sender: linux-raid-owner@vger.kernel.org To: Janek Kozicki Cc: Linux RAID Mailing List List-Id: linux-raid.ids Janek Kozicki wrote: > Hi, > > It's possible to have a ramdisk device. yes > Would it make any sense in > doing raid1 using a common HDD and a ramdisk? It sounds interesting if you have a need... md just uses block devices so there shouldn't be a problem. > They would automatically sync on boot-up of the computer. You'd need to create and --add the ramdisk... > I'm asking because an ultra-fast READ and normal WRITE would be > useful for me... Also look at the --write-mostly and --write-behind options in mdadm. David -- "Don't worry, you'll be fine; I saw it work in a cartoon once..."