From mboxrd@z Thu Jan 1 00:00:00 1970 From: plug bert Subject: metadata versions: 0.90 vs 1.2 Date: Wed, 13 Jun 2012 12:55:43 +0800 (SGT) Message-ID: <1339563343.41566.YahooMailClassic@web190003.mail.sg3.yahoo.com> References: <4FD5E466.4050409@turmel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT Return-path: In-Reply-To: <4FD5E466.4050409@turmel.org> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hello, i noticed this while twiddling with RAID1 arrays... On our old CentOS 4.7 box, i can mount a RAID1 array member independently of the array -- i.e. mount /dev/sdc1 /mountpoint....but on CentOS 5.x and later i am met with an unknown filesystem: linux_raid_member error. Somebody hinted that this had something to do with the metadata versions, so i recreated the RAID1 array on CentOS 5.x with the --metadata=0.90 parameter...and was able to mount the array member w/o any problems. Is this expected behavior? Are there any potential problems if i stick with metadata=0.90(apart from the 28 device and 2Tb disk space limit)? tia