一, 使用mdadm创建RAID
参考：https://wiki.archlinux.org/index.php/RAID
1. 安装 mdadm
/home/tong [tong@TStation] [17:47] > pacman -Ss mdadm core/mdadm 4.0-1 (base) [installed] A tool for managing/monitoring Linux md device arrays, also known as Software RAID
2. 给单盘分区
2.1 GPT分区。
2.2 做好有分区，虽然裸盘也可以。
2.3 分区尾部预留100M的空余，因为：
Even hard drives of the same manufacturer and model can have small size differences. By leaving a little space at the end of the disk unallocated one can
compensate for the size differences between drives, which makes choosing a replacement drive model easier. Therefore, it is good practice to leave
about 100 MB of unallocated space at the end of the disk.
(parted) print free Model: ATA WDC WD3000FYYZ-0 (scsi) Disk /dev/sdc: 3001GB Sector size (logical/physical): 512B/512B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 17.4kB 1049kB 1031kB Free Space 1 1049kB 3000GB 3000GB xfs 3000GB 3001GB 105MB Free Space
(parted) print Model: ATA WDC WD3000FYYZ-0 (scsi) Disk /dev/sdd: 3001GB Sector size (logical/physical): 512B/512B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 1049kB 3000GB 3000GB
3. 使用mdadm制作RAID
/home/tong [tong@TStation] [19:53] > sudo mdadm --create --verbose --level=1 --metadata=1.2 --raid-devices=2 /dev/md0 /dev/sdc1 /dev/sdd1 mdadm: size set to 2930030976K mdadm: automatically enabling write-intent bitmap on large array mdadm: array /dev/md0 started.
4. 后续详细设置参考:
https://wiki.archlinux.org/index.php/RAID#Installation
二, 使用lvm创建RAID
https://wiki.archlinux.org/index.php/LVM#RAID
0. 使用parted分区。
/home/tong [tong@TStation] [12:26] > sudo parted /dev/sdc print Model: ATA WDC WD3000FYYZ-0 (scsi) Disk /dev/sdc: 3001GB Sector size (logical/physical): 512B/512B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 2097kB 3000GB 3000GB /home/tong [tong@TStation] [12:26] > sudo parted /dev/sdd print Model: ATA WDC WD3000FYYZ-0 (scsi) Disk /dev/sdd: 3001GB Sector size (logical/physical): 512B/512B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 2097kB 3000GB 3000GB
1. 创建物理卷
/home/tong [tong@TStation] [12:28] > sudo pvcreate /dev/sdc1 /dev/sdd1 Physical volume "/dev/sdc1" successfully created. Physical volume "/dev/sdd1" successfully created.
2. 创建卷组
/home/tong [tong@TStation] [12:28] > sudo vgcreate VG_storage /dev/sdc1 /dev/sdd1 Volume group "VG_storage" successfully created
3. 创建逻辑卷
more information： https://jlk.fjfi.cvut.cz/arch/manpages/man/lvmraid.7
How LV data blocks are placed onto PVs is determined by the RAID level.
RAID levels are commonly referred to as 'raid' followed by a number, e.g. raid1, raid5 or raid6.
/home/tong [tong@TStation] [12:59] > sudo lvcreate --type raid1 -l 100%FREE -n storage_raid1 VG_storage /dev/sdc1 /dev/sdd1 Logical volume "storage_raid1" created.
/home/tong [tong@TStation] [13:00] > sudo lvs -o name,segtype,size LV Type LSize storage_raid1 raid1 <2.73t
4. 创建文件系统
/home/tong [tong@TStation] [13:04] > sudo mkfs.xfs /dev/VG_storage/storage_raid1 meta-data=/dev/VG_storage/storage_raid1 isize=512 agcount=4, agsize=183105024 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=1, sparse=0, rmapbt=0, reflink=0 data = bsize=4096 blocks=732420096, imaxpct=5 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal log bsize=4096 blocks=357627, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0
5。 挂载
/home/tong [tong@TStation] [13:10] > tail -n 3 /etc/fstab # /dev/mapper/VG_storage-storage_raid1 UUID=c5b048a0-b376-4a00-9a6f-9a9e418d982b /home/tong/Storage xfs rw,relatime,attr2,inode64,noquota 0 2