April 19, 201511 yr unRAID Server Release 6.0-beta14-x86_64 I lost partition table on data disks, the disk look like unformatted when looked at from Ubuntu GParted. This happened on a new install of unRAID when the array was first started and the parity was been built. How do I recover or recreate partition without loosing data?
April 19, 201511 yr Community Expert unRAID Server Release 6.0-beta14-x86_64 I lost partition table on data disks, the disk look like unformatted when looked at from Ubuntu GParted. This happened on a new install of unRAID when the array was first started and the parity was been built. How do I recover or recreate partition without loosing data? What was the original format of the data disks? Were they originally formatted by unRAID?
April 19, 201511 yr Community Expert Have they ever been seen correctly from unRAID? I have a feeling that when you first add a disk to unRAID that it rewrites the partition table and puts some sort of signature on the disk so that it can recognise unRAID formatted disks in the future.
April 20, 201511 yr Author The one data disk did go green when doing the parity build the went off again, but all disks remained unmountable. How can data disks be unmountable and the parity can be built ?
April 20, 201511 yr Community Expert How can data disks be unmountable and the parity can be built ? That is perfectly possible. The parity works at the physical sector level - it does not care what (if any) file system is on the disk.
April 20, 201511 yr I formatted it with GParted as Xfs This is a common mistake users incur. unRAID creates it's own partition table, even if the filesystem is supported. This is because it need to put it's own RAID schema in the beginning of the disk. Roughly speaking, it creates a XFS/BTRFS/ReiserFS partition inside a RAID partition.
April 20, 201511 yr I formatted it with GParted as Xfs Not familiar with use of gparted, but in general, if you use the exact same command and options as you did originally (sans any options that create actual file system), then it should re-create the partition structure you had before. If you plug any storage device into an unRaid array and click "Start", in general those devices will be written with an "unRaid standard" partition layout. If you then click 'Format', those devices will have a file system created in partition 1. An exception exists with the cache disk/pool. If you assign a device to cache disk, or first device to a cache pool, and partition 1 already exists, we will not change the partition layout. But any devices added to an existing cache pool will first have an unraid-standard partition layout written. Make sense?
April 21, 201511 yr Author How do I get the Data disk mountable either under unRAID or linux and not loose the data ?
April 24, 201511 yr Bump, Can anybody help ? XFS is newly integrated into unRAID, so not many users here have experienced table corruption. I have deleted all my files one of these days, which is basically the same (files that lost their inode info from the partition table). I used this : http://www.ufsexplorer.com/ Keep in mind that you will loose some data, it's inevitable. Good luck.
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