我最近買了一台新的桌上型電腦。主機板為：Z77MX-D3H，電源為ocz zs系列550w。
我遇到的問題是，一旦我啟動到作業系統（我嘗試過使用核心2.6.38 - 3.4.0 的fedora 和Ubuntu），我的硬碟（2.5" 磁性）偶爾會發出電源開關噪音並重置。會不穩定並重新連接。
我還注意到，每當我將外部硬碟 USB2.0 或 USB3.0 插入電腦時，重新連接的問題會更加嚴重：
[ 52.198441] sd 7:0:0:0: [sdc] Spinning up disk...
[ 57.955811] usb 4-3: USB disconnect, device number 3
[ 58.023687] .ready
[ 58.023914] sd 7:0:0:0: [sdc] READ CAPACITY(16) failed
[ 58.023919] sd 7:0:0:0: [sdc] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[ 58.023932] sd 7:0:0:0: [sdc] Sense not available.
[ 58.024061] sd 7:0:0:0: [sdc] READ CAPACITY failed
[ 58.024063] sd 7:0:0:0: [sdc] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[ 58.024064] sd 7:0:0:0: [sdc] Sense not available.
[ 58.024099] sd 7:0:0:0: [sdc] Write Protect is off
[ 58.024101] sd 7:0:0:0: [sdc] Mode Sense: 00 00 00 00
[ 58.024135] sd 7:0:0:0: [sdc] Asking for cache data failed
[ 58.024137] sd 7:0:0:0: [sdc] Assuming drive cache: write through
[ 58.024400] sd 7:0:0:0: [sdc] READ CAPACITY(16) failed
[ 58.024402] sd 7:0:0:0: [sdc] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[ 58.024405] sd 7:0:0:0: [sdc] Sense not available.
[ 58.024448] sd 7:0:0:0: [sdc] READ CAPACITY failed
[ 58.024450] sd 7:0:0:0: [sdc] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[ 58.024451] sd 7:0:0:0: [sdc] Sense not available.
[ 58.024469] sd 7:0:0:0: [sdc] Asking for cache data failed
[ 58.024471] sd 7:0:0:0: [sdc] Assuming drive cache: write through
[ 58.024472] sd 7:0:0:0: [sdc] Attached SCSI disk
[ 58.407725] usb 4-3: new SuperSpeed USB device number 4 using xhci_hcd
[ 58.424921] scsi8 : usb-storage 4-3:1.0
[ 59.424185] scsi 8:0:0:0: Direct-Access WD My Passport 0740 1003 PQ: 0 ANSI: 6
[ 59.424406] scsi 8:0:0:1: Enclosure WD SES Device 1003 PQ: 0 ANSI: 6
[ 59.425098] sd 8:0:0:0: Attached scsi generic sg2 type 0
[ 59.425176] ses 8:0:0:1: Attached Enclosure device
[ 59.425248] ses 8:0:0:1: Attached scsi generic sg3 type 13
[ 61.845836] sd 8:0:0:0: [sdc] 976707584 512-byte logical blocks: (500 GB/465 GiB)
[ 61.845838] sd 8:0:0:0: [sdc] 4096-byte physical blocks
[ 61.846336] sd 8:0:0:0: [sdc] Write Protect is off
[ 61.846338] sd 8:0:0:0: [sdc] Mode Sense: 47 00 10 08
[ 61.846718] sd 8:0:0:0: [sdc] No Caching mode page present
[ 61.846720] sd 8:0:0:0: [sdc] Assuming drive cache: write through
[ 61.848105] sd 8:0:0:0: [sdc] No Caching mode page present
[ 61.848106] sd 8:0:0:0: [sdc] Assuming drive cache: write through
[ 61.857147] sdc: sdc1
[ 61.858915] sd 8:0:0:0: [sdc] No Caching mode page present
[ 61.858916] sd 8:0:0:0: [sdc] Assuming drive cache: write through
[ 61.858918] sd 8:0:0:0: [sdc] Attached SCSI disk
[ 69.875809] usb 4-3: USB disconnect, device number 4
[ 70.275816] usb 4-3: new SuperSpeed USB device number 5 using xhci_hcd
[ 70.293063] scsi9 : usb-storage 4-3:1.0
[ 71.292257] scsi 9:0:0:0: Direct-Access WD My Passport 0740 1003 PQ: 0 ANSI: 6
[ 71.292505] scsi 9:0:0:1: Enclosure WD SES Device 1003 PQ: 0 ANSI: 6
[ 71.293527] sd 9:0:0:0: Attached scsi generic sg2 type 0
[ 71.293668] ses 9:0:0:1: Attached Enclosure device
[ 71.293758] ses 9:0:0:1: Attached scsi generic sg3 type 13
[ 73.323804] usb 4-3: USB disconnect, device number 5
[ 101.868078] ses 9:0:0:1: Device offlined - not ready after error recovery
[ 101.868124] ses 9:0:0:1: Failed to get diagnostic page 0x50000
[ 101.868131] ses 9:0:0:1: Failed to bind enclosure -19
[ 101.868288] sd 9:0:0:0: [sdc] READ CAPACITY(16) failed
[ 101.868292] sd 9:0:0:0: [sdc] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[ 101.868296] sd 9:0:0:0: [sdc] Sense not available.
[ 101.868428] sd 9:0:0:0: [sdc] READ CAPACITY failed
[ 101.868434] sd 9:0:0:0: [sdc] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[ 101.868439] sd 9:0:0:0: [sdc] Sense not available.
[ 101.868468] sd 9:0:0:0: [sdc] Write Protect is off
[ 101.868473] sd 9:0:0:0: [sdc] Mode Sense: 00 00 00 00
[ 101.868580] sd 9:0:0:0: [sdc] Asking for cache data failed
[ 101.868584] sd 9:0:0:0: [sdc] Assuming drive cache: write through
[ 101.868845] sd 9:0:0:0: [sdc] READ CAPACITY(16) failed
[ 101.868849] sd 9:0:0:0: [sdc] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[ 101.868854] sd 9:0:0:0: [sdc] Sense not available.
[ 101.868894] sd 9:0:0:0: [sdc] READ CAPACITY failed
[ 101.868898] sd 9:0:0:0: [sdc] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[ 101.868903] sd 9:0:0:0: [sdc] Sense not available.
[ 101.868961] sd 9:0:0:0: [sdc] Asking for cache data failed
[ 101.868966] sd 9:0:0:0: [sdc] Assuming drive cache: write through
[ 101.868969] sd 9:0:0:0: [sdc] Attached SCSI disk
現在，如果我將相同驅動器插入顯示器的供電 USB 2.0 集線器，則不會重現該問題（至少在 20 小時的長時間操作中）。此外，如果在開啟電腦之前插入硬碟，則 USB 重新連接的問題也不會那麼頻繁。
有人對我能做什麼有一些建議嗎？我應該更換哪個故障的零件？對我來說，我真的不知道該把矛頭指向電源還是主機板（我已經更新到最新的韌體並檢查了幾次BIOS設定）。
編輯： 重新連接發生在SATA連接的磁碟機和USBX連接的磁碟機。
答案1
我的舊戴爾電腦也遇到了類似的問題。來自其電源的硬碟電源線束之一“弱”。
在該弱線上汲取電流的裝置（DVDROM、CDRW 或 HD）會（偶爾）發生操作失敗並自行重置。如果在使用弱線路上的設備時機器的任何其他部分正在消耗大量電力，則會發生系統重設。
為了進行故障排除，請嘗試將所有內部設備放在一條電源線上，然後再放在另一條電源線上。使用每種配置對系統施加壓力。
似乎您只能使用內部 SSD 運行，而所有其他設備都可以作為外部供電 USB 運行。
答案2
經過深思熟慮後，我抓住了機會，並更換了電源。現在說還為時過早，但目前系統是穩定的。
事實證明，不僅 USB 裝置（透過主機板供電的地方）故障，直接供電的SATA 驅動器也出現故障。