Intel 矩阵存储 RAID 和 Linux mdadm

Question

我有一个在 Windows 下设置的 3 磁盘 RAID 5 阵列，我想使用 mdadm 在 Linux 中工作。我之前做过一些基本的 fakeraid 工作，但这是使用 BIOS 中的英特尔矩阵存储实用程序设置的，并且它没有像我预期的那样工作。

这是我的磁盘设置：

/dev/sda - 32GB SSD, Windows boot drive.
    /dev/sda1 - Windows system partition
    /dev/sda2 - Windows C:, 29GB

/dev/sdb }
/dev/sdc } the RAID5 array: 3x500GB; contains one partition, a 1TB NTFS filesystem
/dev/sdd }

/dev/sde - 128GB SSD, Linux's drive
    /dev/sde1 - /boot
    /dev/sde2 - LVM PV
        /dev/dm0 - /
        /dev/dm1 - /home
        /dev/dm2 - <swap>

所以我做的第一件事就是运行mdadm --assemble --scan，它产生了以下结果：

mdadm: /dev/sdd is identified as a member of /dev/md/imsm0, slot -1.
mdadm: /dev/sdc is identified as a member of /dev/md/imsm0, slot -1.
mdadm: /dev/sdb is identified as a member of /dev/md/imsm0, slot -1.
mdadm: added /dev/sdc to /dev/md/imsm0 as -1
mdadm: added /dev/sdb to /dev/md/imsm0 as -1
mdadm: added /dev/sdd to /dev/md/imsm0 as -1
mdadm: Container /dev/md/imsm0 has been assembled with 3 drives

因此它在磁盘上找到了 IMSM 信息，并组装了一个容器：

# mdadm --examine /dev/md/imsm0
/dev/md/imsm0:
        Magic : Intel Raid ISM Cfg Sig.
        Version : 1.2.02
    Orig Family : ee19d190
        Family : ee19d190
    Generation : 0009ab28
        UUID : ab31031b:2d9f8489:5d87a6c4:e87e3826
    Checksum : f09a3edc correct
    MPB Sectors : 2
        Disks : 3
RAID Devices : 1

Disk00 Serial : 3PM1DZBD
        State : active
            Id : 00010000
    Usable Size : 976768654 (465.76 GiB 500.11 GB)

[NMWVolume]:
        UUID : c192a859:14874bab:06ca8af9:d3e8b52e
    RAID Level : 5
        Members : 3
    This Slot : 0
    Array Size : 1953536000 (931.52 GiB 1000.21 GB)
Per Dev Size : 976768264 (465.76 GiB 500.11 GB)
Sector Offset : 0
    Num Stripes : 7631000
    Chunk Size : 64 KiB
    Reserved : 0
Migrate State : idle
    Map State : normal
    Dirty State : clean

Disk01 Serial : 3PM222TL
        State : active
            Id : 00020000
    Usable Size : 976768654 (465.76 GiB 500.11 GB)

Disk02 Serial : 3PM22GFQ
        State : active
            Id : 00030000
    Usable Size : 976768654 (465.76 GiB 500.11 GB)

它显示了 Raid5 卷，“NMWVolume”，但我如何获取它？那个容器设备对我没有任何作用。我无法从中读取任何内容，即fdisk /dev/md/imsm0只是返回Unable to read /dev/md/imsm0。

如果我尝试运行，mdadm --create --verbose --level=5 --raid-devices=3 --chunk=64 --auto=mdp /dev/md0 /dev/sd[bcd]我会收到以下错误：

mdadm: layout defaults to left-symmetric
mdadm: layout defaults to left-symmetric
mdadm: layout defaults to left-symmetric
mdadm: super1.x cannot open /dev/sdb: Device or resource busy
mdadm: not enough space after merge (0 < 0)
mdadm: device /dev/sdb not suitable for any style of array

替换/dev/sd[bcd]为/dev/md/imsm0会出现错误mdadm: not enough devices with space to create array.。

我尝试停止阵列并使用 sd[bcd] 驱动器/dev/md/imsm0重新运行命令，它给了我这个：mdadm --create

mdadm: layout defaults to left-symmetric
mdadm: layout defaults to left-symmetric
mdadm: layout defaults to left-symmetric
mdadm: /dev/sdb appears to be part of a raid array:
    level=container devices=0 ctime=Wed Dec 31 18:00:00 1969
mdadm: partition table exists on /dev/sdb but will be lost or
    meaningless after creating array
mdadm: layout defaults to left-symmetric
mdadm: /dev/sdc appears to be part of a raid array:
    level=container devices=0 ctime=Wed Dec 31 18:00:00 1969
mdadm: layout defaults to left-symmetric
mdadm: /dev/sdd appears to be part of a raid array:
    level=container devices=0 ctime=Wed Dec 31 18:00:00 1969
mdadm: partition table exists on /dev/sdd but will be lost or
    meaningless after creating array
mdadm: size set to 488385408K
Continue creating array? ^C

所以我不会那样做...

我没主意了。我如何组装这个数组？

Answer 1

好吧，我傻了。我想到了。

运行mdadm --assemble --scan它找到并组装容器后，运行mdadm -I /dev/md/imsm0组装容器内的数组。噢！

# mdadm --assemble --scan
mdadm: Container /dev/md/imsm0 has been assembled with 3 drives
# mdadm -I /dev/md/imsm0
mdadm: Started /dev/md/NMWVolume with 3 devices
# ls -l /dev/md*
brw-rw---- 1 root disk   9, 126 Jan 24 02:22 /dev/md126
brw-rw---- 1 root disk 259,   0 Jan 24 02:22 /dev/md126p1
brw-rw---- 1 root disk   9, 127 Jan 24 02:22 /dev/md127

/dev/md:
total 0
lrwxrwxrwx 1 root root 8 Jan 24 02:22 imsm0 -> ../md127
lrwxrwxrwx 1 root root 8 Jan 24 02:22 NMWVolume -> ../md126

/dev/md126p1我有 RAID5 的 1TB NTFS 卷。