Re,
Hum…
# mount -ro ufstype=ufs2 /dev/sdf1 /media/sdf1/
mount: /dev/sdf1 is not a valid block device
$ dmesg
[32183.054485] mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...
[32183.054486]
[32183.054487] >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
[32183.054491] ufstype=old is supported read-only
[32183.055501] ufs_read_super: bad magic number
[32637.293288] sd 11:0:0:0: [sdf] Assuming drive cache: write through
[32637.293294] sdf: sdf1
[32637.294383] sdf1: <bsd:bad subpartition - ignored
[32637.294386] sdf5 >
[36521.806031] usb 1-5: reset high speed USB device using ehci_hcd and address 7
[36532.022032] usb 1-5: reset high speed USB device using ehci_hcd and address 7
[36568.807033] usb 1-5: reset high speed USB device using ehci_hcd and address 7
[36568.921277] usb 1-5: device descriptor read/64, error -71
[36569.137281] usb 1-5: device descriptor read/64, error -71
[36569.340278] usb 1-5: reset high speed USB device using ehci_hcd and address 7
[36569.454278] usb 1-5: device descriptor read/64, error -71
[36569.669042] usb 1-5: device descriptor read/64, error -71
[36569.872034] usb 1-5: reset high speed USB device using ehci_hcd and address 7
[36570.281029] usb 1-5: device not accepting address 7, error -71
[36570.383031] usb 1-5: reset high speed USB device using ehci_hcd and address 7
[36570.793062] usb 1-5: device not accepting address 7, error -71
[36570.793111] usb 1-5: USB disconnect, address 7
[36570.793285] sd 11:0:0:0: Device offlined - not ready after error recovery
[36570.793363] sd 11:0:0:0: [sdf] Unhandled error code
[36570.793365] sd 11:0:0:0: [sdf] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[36570.793370] sd 11:0:0:0: [sdf] CDB: Read(10): 28 00 00 00 00 3f 00 00 f0 00
[36570.793395] end_request: I/O error, dev sdf, sector 63
[36570.793401] Buffer I/O error on device sdf1, logical block 0
[36570.793406] Buffer I/O error on device sdf1, logical block 1
[36570.793409] Buffer I/O error on device sdf1, logical block 2
[36570.793412] Buffer I/O error on device sdf1, logical block 3
[36570.793416] Buffer I/O error on device sdf1, logical block 4
[36570.793420] Buffer I/O error on device sdf1, logical block 5
[36570.793423] Buffer I/O error on device sdf1, logical block 6
[36570.793430] Buffer I/O error on device sdf1, logical block 7
[36570.793436] Buffer I/O error on device sdf1, logical block 8
[36570.793631] sd 11:0:0:0: [sdf] Unhandled error code
[36570.793633] sd 11:0:0:0: [sdf] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[36570.793637] sd 11:0:0:0: [sdf] CDB: Read(10): 28 00 00 00 01 2f 00 00 10 00
[36570.793646] end_request: I/O error, dev sdf, sector 303
[36570.899033] usb 1-5: new high speed USB device using ehci_hcd and address 8
[36571.013037] usb 1-5: device descriptor read/64, error -71
[36571.229031] usb 1-5: device descriptor read/64, error -71
[36571.432043] usb 1-5: new high speed USB device using ehci_hcd and address 9
[36571.547034] usb 1-5: device descriptor read/64, error -71
[36571.762164] usb 1-5: device descriptor read/64, error -71
[36571.965030] usb 1-5: new high speed USB device using ehci_hcd and address 10
[36572.373026] usb 1-5: device not accepting address 10, error -71
[36572.475153] usb 1-5: new high speed USB device using ehci_hcd and address 11
[36572.886023] usb 1-5: device not accepting address 11, error -71
[36572.886043] hub 1-0:1.0: unable to enumerate USB device on port 5
[36573.127029] usb 5-1: new full speed USB device using uhci_hcd and address 2
[36573.241037] usb 5-1: device descriptor read/64, error -71
[36573.456723] usb 5-1: device descriptor read/64, error -71
[36573.659276] usb 5-1: new full speed USB device using uhci_hcd and address 3
[36573.772152] usb 5-1: device descriptor read/64, error -71
[36573.986150] usb 5-1: device descriptor read/64, error -71
[36574.189033] usb 5-1: new full speed USB device using uhci_hcd and address 4
[36574.598144] usb 5-1: device not accepting address 4, error -71
[36574.699154] usb 5-1: new full speed USB device using uhci_hcd and address 5
[36575.107145] usb 5-1: device not accepting address 5, error -71
[36575.107166] hub 5-0:1.0: unable to enumerate USB device on port 1
Ça puire… 
Quand je le débranche/rebranche il n’est plus reconnu…
Je vais essayer sur une autre machine.
Mais je vais finir par le formater je crois…