Disco duro externo no reconocido en el puerto USB 2.0

Compré un disco externo Seagate FreeAgent GoFlex Desk (2 TB) hace dos años y utilicé el disco con Ubuntu y Windows (estación de trabajo de arranque dual).

Hice una copy de security de la unidad la semana pasada usando otra computadora con Ubuntu. La unidad estaba conectada a un puerto USB 2.0. Esto funcionó bien. Hoy traté de hacer una nueva copy de security, pero la unidad no se reconoce en ningún puerto USB 2.0 usando Ubuntu en el notebook y la estación de trabajo. Sin embargo, funciona bien con un puerto USB 3.0 en la estación de trabajo que usa Ubuntu y con un puerto USB 2.0 en la estación de trabajo que usa Windows.

salida dmesg en el puerto USB 2.0:

[ 2639.918220] usb 3-13: new full-speed USB device number 35 using xhci_hcd [ 2640.030106] usb 3-13: device descriptor read/64, error -71 [ 2640.245928] usb 3-13: device descriptor read/64, error -71 [ 2640.461606] usb 3-13: new full-speed USB device number 36 using xhci_hcd [ 2640.573492] usb 3-13: device descriptor read/64, error -71 [ 2640.789330] usb 3-13: device descriptor read/64, error -71 [ 2641.004971] usb 3-13: new full-speed USB device number 37 using xhci_hcd [ 2641.005104] usb 3-13: Device not responding to setup address. [ 2641.208798] usb 3-13: Device not responding to setup address. [ 2641.412467] usb 3-13: device not accepting address 37, error -71 [ 2641.524357] usb 3-13: new full-speed USB device number 38 using xhci_hcd [ 2641.524508] usb 3-13: Device not responding to setup address. [ 2641.728214] usb 3-13: Device not responding to setup address. [ 2641.931861] usb 3-13: device not accepting address 38, error -71 [ 2641.931904] usb usb3-port13: unable to enumerate USB device 

salida dmesg en el puerto USB 3.0:

 [ 2688.506387] ata1: exception Emask 0x50 SAct 0x0 SErr 0x4090800 action 0xe frozen [ 2688.506390] ata1: irq_stat 0x00400040, connection status changed [ 2688.506391] ata1: SError: { HostInt PHYRdyChg 10B8B DevExch } [ 2688.506394] ata1: hard resetting link [ 2689.228700] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) [ 2689.233180] ata1.00: configunetworking for UDMA/133 [ 2689.240693] ata1: EH complete [ 2689.614377] ata1: limiting SATA link speed to 1.5 Gbps [ 2689.614382] ata1: exception Emask 0x50 SAct 0x0 SErr 0x4090800 action 0xe frozen [ 2689.614384] ata1: irq_stat 0x00400040, connection status changed [ 2689.614386] ata1: SError: { HostInt PHYRdyChg 10B8B DevExch } [ 2689.614390] ata1: hard resetting link [ 2690.335405] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310) [ 2690.339904] ata1.00: configunetworking for UDMA/133 [ 2690.341259] ata1: EH complete [ 2693.256367] usb 4-2: new SuperSpeed USB device number 6 using xhci_hcd [ 2693.272790] usb 4-2: New USB device found, idVendor=0bc2, idProduct=50a1 [ 2693.272792] usb 4-2: New USB device strings: Mfr=2, Product=3, SerialNumber=1 [ 2693.272794] usb 4-2: Product: FA GoFlex Desk [ 2693.272794] usb 4-2: Manufacturer: Seagate [ 2693.272795] usb 4-2: SerialNumber: XXXXXXXX [ 2693.273197] usb-storage 4-2:1.0: USB Mass Storage device detected [ 2693.273284] scsi11 : usb-storage 4-2:1.0 [ 2694.271915] scsi 11:0:0:0: Direct-Access Seagate FA GoFlex Desk 0D12 PQ: 0 ANSI: 0 [ 2694.272073] sd 11:0:0:0: Attached scsi generic sg3 type 0 [ 2694.272604] sd 11:0:0:0: [sdc] 3907029167 512-byte logical blocks: (2.00 TB/1.81 TiB) [ 2694.272791] sd 11:0:0:0: [sdc] Write Protect is off [ 2694.272793] sd 11:0:0:0: [sdc] Mode Sense: 23 00 00 00 [ 2694.273309] sd 11:0:0:0: [sdc] No Caching mode page found [ 2694.273311] sd 11:0:0:0: [sdc] Assuming drive cache: write through [ 2694.290407] sdc: sdc1 [ 2694.314947] sd 11:0:0:0: [sdc] Attached SCSI disk 

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