configuring RAID1 after installation
Hi all,
I just learned about mirroring of disk using RAID1 in RHEL. I went through the steps to configure my disks. But I am bit confused about how to start with. Actually I have one device /dev/mapper/rhel-home mounted on home. I want to mirror this device with /dev/sdc. I would really appreciate any help.
Here is my df -h and fdisk -l output
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/rhel-root 50G 5.7G 45G 12% /
devtmpfs 32G 0 32G 0% /dev
tmpfs 32G 764K 32G 1% /dev/shm
tmpfs 32G 9.0M 32G 1% /run
tmpfs 32G 0 32G 0% /sys/fs/cgroup
/dev/mapper/rhel-home 3.6T 193M 3.6T 1% /home
/dev/sda3 494M 116M 379M 24% /boot
/dev/sda1 496M 95M 402M 19% /boot/efi
Disk /dev/sdb: 4000.8 GB, 4000787030016 bytes, 7814037168 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
Disk /dev/sda: 4000.8 GB, 4000787030016 bytes, 7814037168 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
Disk label type: dos
Disk identifier: 0xe7d96bb9
Device Boot Start End Blocks Id System
/dev/sda1 1 4294967295 2147483647+ ee GPT
Partition 1 does not start on physical sector boundary.
Disk /dev/sdc: 4000.8 GB, 4000787030016 bytes, 7814037168 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
Disk /dev/mapper/rhel-root: 53.7 GB, 53687091200 bytes, 104857600 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
Disk /dev/mapper/rhel-swap: 33.8 GB, 33764147200 bytes, 65945600 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
Disk /dev/mapper/rhel-home: 3905.2 GB, 3905249345536 bytes, 7627440128 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
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