From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Brown Subject: Re: additional feature for linear Date: Sat, 17 Sep 2011 17:47:37 +0200 Message-ID: References: <6385457414268580907@unknownmsgid> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids On 17/09/11 17:32, Henti Smith wrote: > On Sat, Sep 17, 2011 at 5:20 PM, J=E9r=F4me Poulin wrote: >> On 2011-09-17, at 03:14, Henti Smith wrote: >> >>> Would it not be possible to add functions to linear mode to mark th= is >>> 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 goi= ng >> 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 J=E9r=F4me > > 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 i= t > to do so will test :) > > Thanks again for replying. > > Henti That looks like an interesting idea, and would be particularly useful i= f=20 you've already got several disks with filesystems and want to join them= =20 together. However, I would never consider it for a /new/ setup. The=20 price of disk space is so low that I never again expect to set up a=20 computer without raid, unless it is a laptop with only space for one=20 disk, or a machine using some nameless inferior operating system that=20 doesn't support proper raid. Certainly if you are thinking of putting=20 three disks in a machine then raid10,far would be the natural choice, o= r=20 raid5 if you want a little more space for your pennies. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html