在哪里或如何查看數據是否仍在通過 USB 傳輸到大容量儲存

通過 USB 連接到我的 mp3 播放器的數據傳輸非常慢。

我有一個三星 (YP-M1JCB/EDC) 的 mp3 播放器，它已連接到我的 Fedora linux（mp3 播放器中的pc 連接設置為 MSC，即大容量儲存設備類）。

當我用 USB 電纜將 mp3 播放器連接到我的電腦時，dmesg我看到：

[1351555.669080] usb 2-2: new high-speed USB device number 17 using ehci-pci
[1351555.812993] usb 2-2: New USB device found, idVendor=04e8, idProduct=5123
[1351555.813047] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[1351555.813059] usb 2-2: Product: YP-M1
[1351555.813065] usb 2-2: Manufacturer: Samsung Electronics
[1351555.813071] usb 2-2: SerialNumber: b37c03ac0f1647c2a9720aae4e913080
[1351555.896394] scsi47 : usb-storage 2-2:1.0
[1351556.899771] scsi 47:0:0:0: Direct-Access     Samsung  YP-M1            1.0  PQ: 0 ANSI: 0
[1351556.900481] scsi 47:0:0:1: Direct-Access     Samsung  microSD          1.0  PQ: 0 ANSI: 0
[1351556.902422] sd 47:0:0:0: Attached scsi generic sg3 type 0
[1351556.904403] sd 47:0:0:0: [sdc] 1896703 4096-byte logical blocks: (7.76 GB/7.23 GiB)
[1351556.904617] sd 47:0:0:1: Attached scsi generic sg4 type 0
[1351556.904922] sd 47:0:0:0: [sdc] Write Protect is off
[1351556.904930] sd 47:0:0:0: [sdc] Mode Sense: 00 06 00 00
[1351556.907342] sd 47:0:0:0: [sdc] Asking for cache data failed
[1351556.907361] sd 47:0:0:0: [sdc] Assuming drive cache: write through
[1351556.910613] sd 47:0:0:1: [sdd] Attached SCSI removable disk
[1351556.911467] sd 47:0:0:0: [sdc] 1896703 4096-byte logical blocks: (7.76 GB/7.23 GiB)
[1351556.912448] sd 47:0:0:0: [sdc] Asking for cache data failed
[1351556.912457] sd 47:0:0:0: [sdc] Assuming drive cache: write through
[1351556.913372]  sdc: sdc1
[1351556.916978] sd 47:0:0:0: [sdc] 1896703 4096-byte logical blocks: (7.76 GB/7.23 GiB)
[1351556.919093] sd 47:0:0:0: [sdc] Asking for cache data failed
[1351556.919111] sd 47:0:0:0: [sdc] Assuming drive cache: write through
[1351556.919120] sd 47:0:0:0: [sdc] Attached SCSI removable disk

對我來說似乎沒問題。 然後我安裝設備/dev/sdc1：

sudo mount -o uid=erik /dev/sdc1 /mnt/usb-stick/

當我在設備上創建一個小文本文件，然後解除安裝它時，似乎沒有問題。我可以閱讀設備上的文本文件（它有一個文本閱讀應用程序）。

但是當我將一些更大的文件（mp3 文件）複製到設備時，它需要很長時間。嗯，命令行

cp supermusic.mp3 /mnt/usb-stick/Music/

幾秒鐘後完成。但是當我嘗試解除安裝設備時，它永遠不會完成。dmesg顯示：

[1352056.822086] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352087.878103] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352118.854062] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352149.830105] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352180.870081] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352211.846060] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352211.969584] sd 48:0:0:0: [sdc] Unhandled error code
[1352211.969601] sd 48:0:0:0: [sdc]  
[1352211.969607] Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK
[1352211.969612] sd 48:0:0:0: [sdc] CDB: 
[1352211.969617] Write(10): 2a 00 00 1b 51 02 00 00 1e 00
[1352211.969634] end_request: I/O error, dev sdc, sector 14321680
[1352242.822056] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352273.862064] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352304.838066] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352335.814100] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352366.854074] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352397.830096] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352397.954124] sd 48:0:0:0: [sdc] Unhandled error code
[1352397.954141] sd 48:0:0:0: [sdc]  
[1352397.954147] Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK
[1352397.954153] sd 48:0:0:0: [sdc] CDB: 
[1352397.954157] Write(10): 2a 00 00 1b 51 20 00 00 1e 00
[1352397.954174] end_request: I/O error, dev sdc, sector 14321920
[1352428.870469] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352459.846068] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352490.822088] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352521.862078] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352552.838052] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352583.878077] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352584.005386] sd 48:0:0:0: [sdc] Unhandled error code
[1352584.005401] sd 48:0:0:0: [sdc]  
[1352584.005407] Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK
[1352584.005413] sd 48:0:0:0: [sdc] CDB: 
[1352584.005417] Write(10): 2a 00 00 1b 51 3e 00 00 1e 00
[1352584.005434] end_request: I/O error, dev sdc, sector 14322160
[1352614.854055] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352628.359667] usb 1-2: USB disconnect, device number 46
[1352645.830068] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352676.870073] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352707.846090] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352738.822066] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352769.862077] usb 2-2: reset high-speed USB device number 18 using ehci-pci
[1352769.985579] sd 48:0:0:0: [sdc] Unhandled error code
[1352769.985596] sd 48:0:0:0: [sdc]  
[1352769.985601] Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK
[1352769.985608] sd 48:0:0:0: [sdc] CDB: 
[1352769.985611] Write(10): 2a 00 00 1b 51 5c 00 00 1e 00
[1352769.985630] end_request: I/O error, dev sdc, sector 14322400

似乎有一些問題，但為什麼呢？我已經連接了許多其他大容量儲存設備，從來沒有遇到過問題。

如何查看數據是否仍在傳輸？多快？如果我去 /mnt/usb-stick/Music 文件似乎已經存在（全尺寸）。

PS：當我在等待很長時間後才拔下 USB 電纜時，當我重新連接它並在分區上啟動 fsck.vfat 時，它會發現大量中文字形錯誤，這需要很長時間才能修復。

USB 連接重置表明您的 USB 設備（或者可能是電氣連接）存在物理問題。其他驅動器沒有出現問題的事實支持了這一理論。

日誌證實了這一點。（“end_request：I/O 錯誤，dev sdc，……”等）

丟棄它或不再將它用於重要的事情。

引用自：https://unix.stackexchange.com/questions/228251