[Linux-bruxelles] Vitesse de transfert USB

[quatron]

Bonjour,

Depuis mon upgrade vers Mint 19.3 (et mes essais de délocalisation de 
/var peut-être) j'ai des vitesse de transfert ridiculement lentes ves 
mes clefs USB: 5 MB/s
Qu ce soit avec CINNAMON ou avec mc (1 h environ pour transférer 21.8 Go)

Je devrais être au moins à 60 MB/s non?

hdparm me donne:

micpaq at Ordi-Bureau ~ $ sudo hdparm -t -T /dev/sdc1

/dev/sdc1:
  Timing cached reads:   18796 MB in  1.99 seconds = 9429.26 MB/sec
  Timing buffered disk reads: 332 MB in  3.01 seconds = 110.19 MB/sec

et lsusb -v:

Bus 004 Device 003: ID 090c:2000 Silicon Motion, Inc. - Taiwan (formerly 
Feiya Technology Corp.)
Couldn't open device, some information will be missing
Device Descriptor:
   bLength                18
   bDescriptorType         1
   bcdUSB               3.10
   bDeviceClass            0 (Defined at Interface level)
   bDeviceSubClass         0
   bDeviceProtocol         0
   bMaxPacketSize0         9
   idVendor           0x090c Silicon Motion, Inc. - Taiwan (formerly 
Feiya Technology Corp.)
   idProduct          0x2000
   bcdDevice           11.00
   iManufacturer           1
   iProduct                2
   iSerial                 0
   bNumConfigurations      1
   Configuration Descriptor:
     bLength                 9
     bDescriptorType         2
     wTotalLength           44
     bNumInterfaces          1
     bConfigurationValue     1
     iConfiguration          0
     bmAttributes         0x80
       (Bus Powered)
     MaxPower              126mA
     Interface Descriptor:
       bLength                 9
       bDescriptorType         4
       bInterfaceNumber        0
       bAlternateSetting       0
       bNumEndpoints           2
       bInterfaceClass         8 Mass Storage
       bInterfaceSubClass      6 SCSI
       bInterfaceProtocol     80 Bulk-Only
       iInterface              0
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x01  EP 1 OUT
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0400  1x 1024 bytes
         bInterval               0
         bMaxBurst               8
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x82  EP 2 IN
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0400  1x 1024 bytes
         bInterval               0
         bMaxBurst               8

Une idée du botle neck?

--
Michel