From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Helmut Hullen" Subject: Re: 800 GByte free, but "no space left" Date: 05 Dec 2010 10:51:00 +0100 Message-ID: References: Reply-To: helmut@hullen.de Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 To: linux-btrfs@vger.kernel.org Return-path: In-Reply-To: List-ID: Hallo, cwillu, Du meintest am 05.12.10: >>> I am not an expert on this by a long shot, but it looks like you >>> added these two disks in raid0. >> I won't hope that this error is related to RAID0, I haven't >> installed (as far as I know) RAID0. >> >> My installation way: >> >> (2-TByte-Disk) >> >> =A0 =A0 =A0 =A0mkfs.btrfs /dev/sdf2 >> =A0 =A0 =A0 =A0mount /dev/sdf2 /srv/MM >> >> (1.5-TByte-Disk) >> =A0 =A0 =A0 =A0btrfs device add /dev/sdc3 /srv/MM >> =A0 =A0 =A0 =A0btrfs filesystem balance /srv/MM >> >> (and then waiting about 1 day ...) >> Especially: no RAID definition. [...] > If it's not a raid1, and there's multiple devices, it's a raid0 (and > so available space is the sum of all drives). Your problem however > is that metadata is raid1 by default (where everything is duplicated > on separate drives). Maybe you're right. But if you're right then I have got the worst of tw= o =20 worlds. I don't want neither RAID0 nor RAID1, I want a bundle of =20 different disks (at least partititions) which seem to be one large disk= =2E =20 And I've hoped btrfs does this job. > Adding another device will probably work around this, as will simply > running a balance operation (possibly, and you may need to free up > some space first anyway). That could lead to the following steps: Buy a 3 GByte disk =A0 =A0 =A0 =A0 btrfs device add /dev/sdxy /srv/MM =A0 =A0 =A0btrfs filesystem balance /srv/MM 1.5 TByte disk: btrfs device delete /dev/sdc3 /srv/MM =A0 =A0 =A0btrfs filesystem balance /srv/MM and then disconnect the 1.5 TByte disk (and hope that now the 2 TByte =20 disk sets the limits). No nice way ... -------------------------- Is there a way to avoid this (presumably) RAID mismatch? By the way: working with TByte disks includes (for home users) that =20 there's no backup ... 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