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[ubuntu] RAID (mdadm) Degrades when copying files to drives

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http://ubuntuforums.org – We have a Ubuntu 12.04 LTS server which is configured with a 2 disk software 1 RAID (mdadm). The disks are 3TB and partitioned with a 1MB GPT partition and with the remaining assigned to the RAID. The RAID partition is then allocated as LVM Volume Group and hosts three logical partition for the /boot, /, swap. Following the system being built we tested it by removing a disk and all worked well. We then replaced the disk and re-add the disk back into the RAID. We have now installed SAMBA on the system and are trying to copy 200Gb of data to a subfolder of the root partition. Every time we do th (Hardware)