From mboxrd@z Thu Jan 1 00:00:00 1970 From: Cory Coager Subject: Re: support for external persistent cache Date: Tue, 18 Jan 2011 22:34:58 -0500 Message-ID: <4D365BE2.9020300@gmail.com> References: <4D365551.7090207@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Roberto Spadim , linux-raid@vger.kernel.org List-Id: linux-raid.ids On 01/18/2011 10:17 PM, Roberto Spadim wrote: > reading again... should you use a good ups system with information > about % of batery, like a notebook? > read/write cache can be change with async or sync options on filesystem mount > batery support is done with ups system > maybe with some time of use (10 years) the baterry of you ramdisk > should be replaced, will you replace it? is easier replace a ups > batery or a ramdisk specific batery? > check at internet about 12vdc atx power supply, and use a charger and > a car batery to supply power to your computer, it's a very nice > solution =) Sure, I'll replace the battery in the ram disk. Not much different than a hardware raid card with a battery in it. I think you're missing my point. A UPS isn't going to save your file system if the machine dies mid-write.