I have a RAID 10 array consisting of 4 disks. One of them has failed and I have removed it from the array.
I have purchased an identical new drive and am unsure about how to add the new drive to the array.
In some literature that I read, it was mentioned that I need to copy the partitions to the new drive. In other online material that I read it seemed like the drive was simply added to the array and the syncing began without any mention of partitions having to be copied.
So now I am unsure how to proceed.
Here is some info about my raid 10 array.
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md127 : active raid10 sda1 sdb1 sdc1 5860267008 blocks super 1.2 512K chunks 2 near-copies [4/3] [UUU_] unused devices: <none>
sudo mdadm --detail /dev/md127
mdadm: unreconised word on DEVICE line: UUID=8eac0a3d-a22c-1a92-6ed9-f147f3dea64f mdadm: unreconised word on DEVICE line: UUID=246226d0-a621-7f34-87b6-ff33b5c55906 mdadm: unreconised word on DEVICE line: UUID=52e1afa6-3ca6-a96e-f3dc-99bd0f56e878 mdadm: unreconised word on DEVICE line: UUID=16843e03-f177-97ef-07a7-6d761de9e99b /dev/md127: Version : 1.2 Creation Time : Sat Dec 13 15:01:15 2014 Raid Level : raid10 Array Size : 5860267008 (5588.79 GiB 6000.91 GB) Used Dev Size : 2930133504 (2794.39 GiB 3000.46 GB) Raid Devices : 4 Total Devices : 3 Persistence : Superblock is persistent Update Time : Mon Dec 31 22:07:21 2018 State : clean, degraded Active Devices : 3 Working Devices : 3 Failed Devices : 0 Spare Devices : 0 Layout : near=2 Chunk Size : 512K Name : server:0 (local to host server) UUID : 47c17420:8c4f5bf8:d70c8436:38187fe6 Events : 973 Number Major Minor RaidDevice State 0 8 1 0 active sync /dev/sda1 1 8 17 1 active sync /dev/sdb1 2 8 33 2 active sync /dev/sdc1 3 0 0 3 removed
gdisk -l of disk /dev/sda1 (in order to copy to new disk dev/sdd):
GPT fdisk (gdisk) version 0.8.8 Partition table scan: MBR: not present BSD: not present APM: not present GPT: not present Creating new GPT entries. Disk /dev/sda1: 5860530176 sectors, 2.7 TiB Logical sector size: 512 bytes Disk identifier (GUID): AF72F8BD-75D0-469A-A7D3-3A4A40EFFFBE Partition table holds up to 128 entries First usable sector is 34, last usable sector is 5860530142 Partitions will be aligned on 2048-sector boundaries Total free space is 5860530109 sectors (2.7 TiB) Number Start (sector) End (sector) Size Code Name
I would be very thankful for steps required to swap the failed drive.