From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roy Sigurd Karlsbakk Subject: Re: strange partition table and slow speeds Date: Mon, 17 Dec 2012 21:47:13 +0100 (CET) Message-ID: <28361073.8.1355777233170.JavaMail.root@zimbra> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Alex Pientka Cc: linux-raid@vger.kernel.org, Phil Turmel List-Id: linux-raid.ids why would you want to use partitions for such a RAID in the first place= ? ----- Opprinnelig melding ----- > That brings up the question: Any reason to get the partition table > fixed up? Is this just a cosmetic issue? > Alex >=20 >=20 > On Mon, Dec 17, 2012 at 12:41 PM, Phil Turmel > wrote: > > [Top-posting repaired. Please don't.] > > > > On 12/17/2012 12:26 PM, Alex Pientka wrote: > >> On Mon, Dec 17, 2012 at 12:18 PM, Phil Turmel > >> wrote: > >>> Hi Alex, > >>> > >>> On 12/17/2012 09:17 AM, Alex Pientka wrote: > >>> > >>> [trim /] > >>>> > >>>> /dev/md0: > >>>> Version : 1.1 > >>> > >>> ^^^^^ > >>> You've deliberately chosen a metadata version that places the > >>> superblock > >>> at sector 0 of the given device. If that is a whole disk, it > >>> overwrites > >>> the partition table. The default metadata is v1.2 (which places > >>> the > >>> superblock at offset 4k) for this very reason. > > > >> I assume upgrading to v1.2 is not possible. The only other way > >> would > >> be to fail every raw device (one-by-one) and then create the fd > >> partition on it, correct? > > > > You could put the array back on partitions if you like. I'd make a > > complete backup, zero the superblocks, and use --create > > --assume-clean > > to switch to v1.2 in place (with due care to maintain the device > > order > > and data offsets). > > > > (Save the output of "mdadm -E /dev/sdXX" for each member device > > before > > you start.) > > > > However, that fdisk can't understand the partition table shouldn't > > be > > hurting anything, so I wouldn't make it a priority. > > > > BTW, partition type 'fd' is deprecated along with v0.90 metadata, a= s > > it > > only impacts kernel non-initramfs autoassembly, and that only works > > with > > DOS partition tables and v0.90 metadata. > > > > Phil > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" > in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html --=20 Vennlige hilsener / Best regards roy -- Roy Sigurd Karlsbakk (+47) 98013356 roy@karlsbakk.net http://blogg.karlsbakk.net/ GPG Public key: http://karlsbakk.net/roysigurdkarlsbakk.pubkey.txt -- I all pedagogikk er det essensielt at pensum presenteres intelligibelt.= Det er et element=C3=A6rt imperativ for alle pedagoger =C3=A5 unng=C3=A5= eksessiv anvendelse av idiomer med xenotyp etymologi. I de fleste tilf= eller eksisterer adekvate og relevante synonymer p=C3=A5 norsk. -- 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