From mboxrd@z Thu Jan 1 00:00:00 1970 From: Felix Blanke Subject: Re: kernel 3.3.4 damages filesystem (?) Date: Tue, 08 May 2012 19:24:32 +0200 Message-ID: <4FA956D0.30307@gmail.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Cc: Helmut Hullen , linux-btrfs@vger.kernel.org To: helmut@hullen.de Return-path: In-Reply-To: List-ID: On 5/8/12 6:53 PM, Helmut Hullen wrote: > Hallo, Felix, > > Du meintest am 08.05.12: > >>> Why should I use RAID0 with a bundle of ext2/3/4? Mounting on/in the >>> directory tree does the job. > >> Nobody told you that you should do it. What EVERYBODY here is telling >> you: The problem you have right now would be the same damn problem, >> no matter what fs you would you. Every fs will be unusable if you >> lose one disk in a raid0 setup. That's all what we are trying to tell >> you for the last 15 mails :) > >> If you don't see any benefits using btrfs then simply don't use it > > I still hope for a benefit when I use btrfs. > > As I've written many times: I want a system for my video collection > which allows > > adding a bigger disk > deleting/removing a smaller disk > > with simple commands. > > btrfs seems to be able to do that (and I have tested this job many > times). But with my configuration "mkfs.btrfs -m raid1 -d raid0" I've > (again) seen that all data vanishes when 1 disk fails. > > I'll try Hugo's proposal "mkfs.btrfs -m raid1 -d single". > And I hope that it doesn't make all disks unreadable when 1 disk fails. Maybe you should inform yourself about the different raid level before you use them? http://en.wikipedia.org/wiki/Standard_RAID_levels#RAID_0 Raid0 will allways be that way: One disk dies, filesystem is gone. That's some sort of defintion of raid0 :) @"-d single" Is it really possible to remove a disk from btrfs (created with -d single) without losing the data on that disk? Is there a way to tell balance to copy all the data from this disk to the other disks (ofc if there is enough free space on them)? > > Viele Gruesse! > Helmut > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html