Messages in this thread | | | Subject | Re: RAID array is gone, please help | From | Stephen Mueller <> | Date | Thu, 23 Mar 2017 21:09:39 +0100 |
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OK, I used gdisk to remove the GPT and MBR from each disk. mdadm --assemble still doesn't work... says it can't find the superblock. The mdadm --examine commands also say that no superblock is detected.
I guess I'll go ahead with --create...
On 3/23/2017 20:59, Lennart Sorensen wrote: > On Thu, Mar 23, 2017 at 08:38:08PM +0100, Stephen Mueller wrote: >> Apologies, I should have started this on linux-raid... >> >> >> stephen@fred> sudo gdisk -l /dev/sdc >> GPT fdisk (gdisk) version 1.0.1 >> >> Partition table scan: >> MBR: protective >> BSD: not present >> APM: not present >> GPT: present >> >> Found valid GPT with protective MBR; using GPT. >> Disk /dev/sdc: 7814037168 sectors, 3.6 TiB >> Logical sector size: 512 bytes >> Disk identifier (GUID): 60F1D54C-9D17-4688-BD6E-447F5E7408EB >> Partition table holds up to 128 entries >> First usable sector is 34, last usable sector is 7814037134 >> Partitions will be aligned on 2048-sector boundaries >> Total free space is 7814037101 sectors (3.6 TiB) >> >> Number Start (sector) End (sector) Size Code Name >> stephen@fred> >> >> The other disks are all similar. >> >> How do I remove the MBR/GPT tables? So you would do that, and then the >> mdadm --create? > > Well at least that seems to confirm that something restored the GPT from > the second copy at the end of the disk, wiping out the md superblock > at 4k. > > If you run gdisk /dev/sdc, it has a 'zap' option using the z key to > delete all traces of GPT. That ought to do what you want. >
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