Le cable de 20 cm et le DD sont utilisés pour les auvegarde et il n'y a pas de problème. La clé USB est neuve, et serait peut être défectueuse ?
lsusb
Bus 002 Device 003: ID 048d:1234 Integrated Technology Express, Inc. Mass storage
sudo hdparm -t -T /dev/sdb1
/dev/sdb1:
Timing cached reads: 3558 MB in 2.00 seconds = 1780.19 MB/sec
SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Timing buffered disk reads: 86 MB in 3.05 seconds = 28.21 MB/sec
Je découvre tout en posant la question.... Je crois que ces erreurs viennent du fait que ce n'est pas un DD mais une clé USB
sudo hdparm -I /dev/sdb
/dev/sdb:
SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ATA device, with non-removable media
Standards:
Likely used: 1
Configuration:
Logical max current
cylinders 0 0
heads 0 0
sectors/track 0 0
--
Logical/Physical Sector size: 512 bytes
device size with M = 1024*1024: 0 MBytes
device size with M = 1000*1000: 0 MBytes
cache/buffer size = unknown
Capabilities:
IORDY not likely
Cannot perform double-word IO
R/W multiple sector transfer: not supported
DMA: not supported
PIO: pio0