I want to understand why my partition table is suddenly different moving it from one system to a different one. This happened after I moved the 6 drives from one system to the new system. Is this the reason why I suddenly have such bad performance? Alex On Mon, Dec 17, 2012 at 3:47 PM, Roy Sigurd Karlsbakk <roy@xxxxxxxxxxxxx> wrote: > 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 >> >> >> On Mon, Dec 17, 2012 at 12:41 PM, Phil Turmel <philip@xxxxxxxxxx> >> 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 <philip@xxxxxxxxxx> >> >> 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, as >> > 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@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- > Vennlige hilsener / Best regards > > roy > -- > Roy Sigurd Karlsbakk > (+47) 98013356 > roy@xxxxxxxxxxxxx > 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 elementært imperativ for alle pedagoger å unngå eksessiv anvendelse av idiomer med xenotyp etymologi. I de fleste tilfeller eksisterer adekvate og relevante synonymer på norsk. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
