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硬件 RAID1 设备大小不正确/太小？

tag-icon • tag-icon 12.04 hard-drive raid lvm
硬件 RAID1 设备大小不正确/太小？

我的主板有一个 Intel RAID 控制器。我在名为“Home”的 RAID1 中设置了 2x3TB HDD。这应该会形成一个大约 3TB 的单个设备。这就是我最终得到的结果：

# fdisk -l

Disk /dev/sda: 240.1 GB, 240057409536 bytes
255 heads, 63 sectors/track, 29185 cylinders, total 468862128 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0003431e

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1            2048     3905535     1951744   83  Linux
/dev/sda2         3907582   468860927   232476673    5  Extended
/dev/sda5         3907584   468860927   232476672   8e  Linux LVM

Disk /dev/sdb: 3000.6 GB, 3000592982016 bytes
255 heads, 63 sectors/track, 364801 cylinders, total 5860533168 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 identifier: 0x00097a6c

   Device Boot      Start         End      Blocks   Id  System

Disk /dev/sdc: 3000.6 GB, 3000592982016 bytes
255 heads, 63 sectors/track, 364801 cylinders, total 5860533168 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 identifier: 0x00097a6c

Disk /dev/mapper/isw_djdcaefbcg_Home: 651.5 GB, 651543318528 bytes
255 heads, 63 sectors/track, 79212 cylinders, total 1272545544 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 identifier: 0x00097a6c

              Device Boot      Start         End      Blocks   Id  System

如您所见，我最终得到的设备是 650GB，而不是 3TB。我使用的是全新更新的 Ubuntu 12.04。

答案1

显然这是 RAID 控制器本身的一个错误。我最终放弃了，转而使用软件 RAID。

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