我正在尝试将当前的RAID 1转换为RAID0 + 1，并在安装bootloader时遇到问题 – 请看看我在做什么。
我目前的configuration是RAID1（2 * 10GB）：
[root @ localhost〜]＃mdadm –detail / dev / md0
的/ dev / md0的：
Version : 1.0 Creation Time : Thu May 8 20:13:26 2014 Raid Level : raid1 Array Size : 10279808 (9.80 GiB 10.53 GB) Used Dev Size : 10279808 (9.80 GiB 10.53 GB) Raid Devices : 2 Total Devices : 2 Persistence : Superblock is persistent Intent Bitmap : Internal Update Time : Wed May 14 21:49:34 2014 State : active Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 Name : livecd.centos:0 UUID : 877ab4b2:7d4a61f7:a732e1c0:115c9ee5 Events : 72 Number Major Minor RaidDevice State 0 8 2 0 active sync /dev/sda2 1 8 18 1 active sync /dev/sdb2 现在我添加2 * 2GB的驱动器在我的vm – 我降级我的RAID1后; 与发生故障的驱动器和新的驱动器，我做了raid0：
[root @ localhost〜]＃mdadm / dev / md0 -f / dev / sdb2 -r / dev / sdb2
mdadm: set /dev/sdb2 faulty in /dev/md0 mdadm: hot removed /dev/sdb2 from /dev/md0
[root @ localhost〜]＃fdisk / dev / sdc
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c') and change display units to sectors (command 'u'). Command (m for help): n Command action e extended p primary partition (1-4) p Partition number (1-4): 2 First cylinder (1-261, default 1): Using default value 1 Last cylinder, +cylinders or +size{K,M,G} (1-261, default 261): Using default value 261 Command (m for help): t Selected partition 2 Hex code (type L to list codes): fd Changed system type of partition 2 to fd (Linux raid autodetect) Command (m for help): wq The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks.
[root @ localhost〜]＃mkfs.ext4 / dev / sdc2
mke2fs 1.41.12 (17-May-2010) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 131072 inodes, 524112 blocks 26205 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=536870912 16 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912 Writing inode tables: done Creating journal (8192 blocks): done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 38 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override.
[root @ localhost〜]＃mdadm –zero-superblock / dev / sdb2
构buildRAID0，以便我可以成为RAID1的一部分
[root @ localhost〜]＃mdadm –create / dev / md5 –name = 5 –homehost = livecd.centos -l 0 -n 2 / dev / sdb2 / dev / sdc2
mdadm: /dev/sdb2 appears to contain an ext2fs file system size=10279808K mtime=Wed May 14 21:28:53 2014 mdadm: /dev/sdc2 appears to contain an ext2fs file system size=2096448K mtime=Thu Jan 1 04:00:00 1970 Continue creating array? y mdadm: Defaulting to version 1.2 metadata mdadm: array /dev/md5 started.
[root @ localhost〜]＃cat / proc / mdstat
Personalities : [raid0] [raid1] md5 : active raid0 sdc2[1] sdb2[0] 12375552 blocks super 1.2 512k chunks md0 : active raid1 sda2[0] 10279808 blocks super 1.0 [2/1] [U_] bitmap: 1/1 pages [4KB], 65536KB chunk md1 : active raid0 sdb1[1] sda1[0] 408576 blocks super 1.1 512k chunks unused devices: <none>
添加RAID0到降级RAID1
[root @ localhost〜]＃mdadm –add / dev / md0 / dev / md5
mdadm：添加了/ dev / md5
[root @ localhost〜]＃cat / proc / mdstat
Personalities : [raid0] [raid1] md5 : active raid0 sdc2[1] sdb2[0] 12375552 blocks super 1.2 512k chunks md0 : active raid1 md5[2] sda2[0] 10279808 blocks super 1.0 [2/2] [UU] bitmap: 0/1 pages [0KB], 65536KB chunk md1 : active raid0 sdb1[1] sda1[0] 408576 blocks super 1.1 512k chunks unused devices: <none>
[root @ localhost〜]＃mdadm –detail / dev / md0
/dev/md0: Version : 1.0 Creation Time : Thu May 8 20:13:26 2014 Raid Level : raid1 Array Size : 10279808 (9.80 GiB 10.53 GB) Used Dev Size : 10279808 (9.80 GiB 10.53 GB) Raid Devices : 2 Total Devices : 2 Persistence : Superblock is persistent Intent Bitmap : Internal Update Time : Wed May 14 22:13:20 2014 State : active Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 Name : livecd.centos:0 UUID : 877ab4b2:7d4a61f7:a732e1c0:115c9ee5 Events : 191 Number Major Minor RaidDevice State 0 8 2 0 active sync /dev/sda2 2 9 5 1 active sync /dev/md5
现在是时候安装bootloader了 – 这是我失败的一步，需要你的帮助。
[root @ localhost〜]＃grub
Probing devices to guess BIOS drives. This may take a long time. Unknown partition table signature GNU GRUB version 0.97 (640K lower / 3072K upper memory) [ Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists the possible completions of a device/filename.] grub> find /boot/grub/grub.conf find /boot/grub/grub.conf (hd0,1) grub> device (hd1) /dev/sdb device (hd1) /dev/sdb grub> root (hd1,1) root (hd1,1) Filesystem type is ext2fs, partition type 0xfd grub> setup (hd1) setup (hd1) Checking if "/boot/grub/stage1" exists... no Checking if "/grub/stage1" exists... no Error 2t: Bad file or directory type grub>
我应该在哪里安装bootloader？
md5有/ dev / sdb2和/ dev / sdc2应该在哪里安装boot loader？
不会有这些/ dev / sdb2或/ dev / sdc2出现在grub下。
一旦引导加载程序安装raid0然后我会重复/ dev / sda2相同的程序。