尝试添加2个SATA硬盘驱动器在服务器上的第二个驱动器

我一直在使用网上的一些指南，并有一个奇怪的问题。 我在第一个驱动器sda1，sda2，sda3和sda4上安装了4个分区，我可以在那里看到一个sdb1，sdb2和sdb3，我猜是从之前的驱动器上得到的。

我的问题是我看到build立一个新的硬盘驱动器的所有指南谈论运行fdisk对sda或sdb应该是原始设备。

我的问题是这些设备/ dev / sda或/ dev / sdb不存在。 运行fdisk -l也不会返回任何内容。

任何人都可以指向正确的方向吗？

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提前致谢

 Command line: BOOT_IMAGE=/boot/bzImage-3.2.13-xxxx-grs-ipv6-64 root=/dev/sda1 ro Kernel command line: BOOT_IMAGE=/boot/bzImage-3.2.13-xxxx-grs-ipv6-64 root=/dev/sda1 ro sd 0:0:0:0: [sda] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB) sd 0:0:0:0: Attached scsi generic sg0 type 0 sd 1:0:0:0: [sdb] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB) sd 1:0:0:0: [sdb] 4096-byte physical blocks sd 1:0:0:0: [sdb] Write Protect is off sd 1:0:0:0: [sdb] Mode Sense: 00 3a 00 00 sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 1:0:0:0: Attached scsi generic sg1 type 0 sd 0:0:0:0: [sda] 4096-byte physical blocks sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA libceph: loaded (mon/osd proto 15/24, osdmap 5/6 5/6) sda: sda1 sda2 sda3 sda4 sd 0:0:0:0: [sda] Attached SCSI disk sdb: sdb1 sdb2 sdb3 sd 1:0:0:0: [sdb] Attached SCSI disk md: invalid raid superblock magic on sdb1 md: sdb1 does not have a valid v0.90 superblock, not importing! md: invalid raid superblock magic on sdb2 md: sdb2 does not have a valid v0.90 superblock, not importing! EXT3-fs (sda1): error: couldn't mount because of unsupported optional features (240) EXT2-fs (sda1): error: couldn't mount because of unsupported optional features (240) EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null) EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro Adding 1047548k swap on /dev/sda4. Priority:-1 extents:1 across:1047548k EXT4-fs (sda2): mounted filesystem with ordered data mode. Opts: (null) EXT4-fs (sda3): mounted filesystem with ordered data mode. Opts: (null) 

 sudo /dev/MAKEDEV sd