SebMa's questions

我有以下虚拟磁盘：

# omreport storage vdisk controller=0 vdisk=14
Virtual Disk 14 on Controller PERC H730 Mini (Embedded)

Controller PERC H730 Mini (Embedded)
ID                                : 14
Status                            : Ok
Name                              : VirtualDisk14
State                             : Ready
Hot Spare Policy violated         : Not Applicable
Encrypted                         : No
Layout                            : RAID-0
Size                              : 3,725.50 GB (4000225165312 bytes)
T10 Protection Information Status : No
Associated Fluid Cache State      : Not Applicable
Device Name                       : /dev/sdn
Bus Protocol                      : SAS
Media                             : HDD
Read Policy                       : No Read Ahead
Write Policy                      : Force Write Back
Cache Policy                      : Not Applicable
Stripe Element Size               : 64 KB
Disk Cache Policy                 : Disabled

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从 CLI 中，如何找到虚拟磁盘中的物理磁盘？

如果我使用 CAT.5e 电缆直接连接到我的 100MB 路由器，我会得到以下结果：

$ speedtest --simple 
Ping: 8.617 ms
Download: 92.54 Mbit/s
Upload: 93.90 Mbit/s
$ ethtool eth0
Settings for eth0:
    Supported ports: [ TP MII ]
    Supported link modes:   10baseT/Half 10baseT/Full 
                            100baseT/Half 100baseT/Full 
    Supported pause frame use: No
    Supports auto-negotiation: Yes
    Advertised link modes:  10baseT/Half 10baseT/Full 
                            100baseT/Half 100baseT/Full 
    Advertised pause frame use: Symmetric Receive-only
    Advertised auto-negotiation: Yes
    Link partner advertised link modes:  10baseT/Half 10baseT/Full 
                                         100baseT/Half 100baseT/Full 
    Link partner advertised pause frame use: Symmetric Receive-only
    Link partner advertised auto-negotiation: Yes
    Speed: 100Mb/s
    Duplex: Full
    Port: MII
    PHYAD: 0
    Transceiver: internal
    Auto-negotiation: on
    Current message level: 0x00000033 (51)
                   drv probe ifdown ifup
    Link detected: yes

但是，如果我通过两个dLAN® 200 AVmini PLC（一个电源线转换器连接到路由器，另一个连接到我的 PC）连接到同一个路由器，我会得到：

$ speedtest --simple
Ping: 12.843 ms
Download: 43.86 Mbit/s
Upload: 49.06 Mbit/s
$ ethtool eth0
Settings for eth0:
    Supported ports: [ TP MII ]
    Supported link modes:   10baseT/Half 10baseT/Full
                            100baseT/Half 100baseT/Full
    Supported pause frame use: No
    Supports auto-negotiation: Yes
    Advertised link modes:  10baseT/Half 10baseT/Full
                            100baseT/Half 100baseT/Full
    Advertised pause frame use: Symmetric Receive-only
    Advertised auto-negotiation: Yes
    Link partner advertised link modes:  10baseT/Half 10baseT/Full
                                         100baseT/Half 100baseT/Full
    Link partner advertised pause frame use: No
    Link partner advertised auto-negotiation: Yes
    Speed: 100Mb/s
    Duplex: Full
    Port: MII
    PHYAD: 0
    Transceiver: internal
    Auto-negotiation: on
    Current message level: 0x00000033 (51)
                   drv probe ifdown ifup
    Link detected: yes 

两者的区别在于：

Ping: 8.617 ms                                                     |    Ping: 12.843 ms
Download: 92.54 Mbit/s                                             |    Download: 43.86 Mbit/s
Upload: 93.90 Mbit/s                                               |    Upload: 49.06 Mbit/s
    Link partner advertised pause frame use: Symmetric Receive-only|        Link partner advertised pause frame use: No

为什么速度除以二，我该如何解决？

EDIT0：可以阅读dLAN® 200 AVmini 产品表和HomePlug 维基百科文章。