restore 3disk raid5 after raidpartitions have been setup with xfs filesystem by accident

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Dear Developers & Gurus & Gods,

i had a 3 disk software raid 5 (mdadm) on a buffalo terrastation. By
accident I reset the raid and the NAS put on a xfs filesystem on each
of the 3 partitions.

sda6 sdb6 and sdc6 have been the raid5 member partitions.

Now sda6 sdb6 and sdc6 only contain a xfs filesystem with some empty
default folder structure - my NAS created during the "reset".

mdadm --examine /dev/sda6
mdadm: No md superblock detected on /dev/sda6
mdadm --examine /dev/sdb6
mdadm: No md superblock detected on /dev/sdb6
mdadm --examine /dev/sdc6
mdadm: No md superblock detected on /dev/sdc6

Disk /dev/sdc: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: FAB30D96-11C4-477E-ADAA-9448A087E124

Device        Start        End    Sectors   Size Type
/dev/sdc1      2048    2002943    2000896   977M Microsoft basic data
/dev/sdc2   2002944   12003327   10000384   4.8G Microsoft basic data
/dev/sdc3  12003328   12005375       2048     1M Microsoft basic data
/dev/sdc4  12005376   12007423       2048     1M Microsoft basic data
/dev/sdc5  12007424   14008319    2000896   977M Microsoft basic data
/dev/sdc6  14008320 1937508319 1923500000 917.2G Microsoft basic data

XFS-Log attached for reference.

Am I screwed or is there a chance to recreate the raid with the 3
disks end up with the raid and the filesystem i had before?

any help is greatly appreciated.

Simon

Attachment: xfs-log
Description: Binary data


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