-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, got a new USB stick (Trascend 3.1 from Amazon, 16 gig), for the purpose of putting there the 15.5 DVD image, and I'm testing it. I unplug the stick, plug it back, then run each dd test - and sometimes, it goes very slow: Telcontar:/data/storage_b/copias_usb_sticks/vacios # time dd if=/dev/sde of=TrascendUBB31Gen1CaplessAmazonFFP_16Gb.img bs=16M status=progress 15384707072 bytes (15 GB, 14 GiB) copied, 129 s, 119 MB/s 921+1 records in 921+1 records out 15461253120 bytes (15 GB, 14 GiB) copied, 130.45 s, 119 MB/s real 2m10.894s user 0m0.012s sys 0m10.512s Telcontar:/data/storage_b/copias_usb_sticks/vacios # time dd if=/dev/sde of=TrascendUBB31Gen1CaplessAmazonFFP_16Gb.img bs=16M status=progress 15451815936 bytes (15 GB, 14 GiB) copied, 403 s, 38.3 MB/s 921+1 records in 921+1 records out 15461253120 bytes (15 GB, 14 GiB) copied, 403.923 s, 38.3 MB/s <========================== real 6m44.703s user 0m0.017s sys 0m11.913s Telcontar:/data/storage_b/copias_usb_sticks/vacios # Telcontar:/data/storage_b/copias_usb_sticks/vacios # time dd if=/dev/sde of=TrascendUBB31Gen1CaplessAmazonFFP_16Gb.img bs=16M status=progress 15401484288 bytes (15 GB, 14 GiB) copied, 129 s, 119 MB/s 921+1 records in 921+1 records out 15461253120 bytes (15 GB, 14 GiB) copied, 130.256 s, 119 MB/s real 2m10.952s user 0m0.008s sys 0m10.563s Telcontar:/data/storage_b/copias_usb_sticks/vacios # time dd if=/dev/sde of=TrascendUBB31Gen1CaplessAmazonFFP_16Gb.img bs=16M status=progress 15384707072 bytes (15 GB, 14 GiB) copied, 129 s, 119 MB/s 921+1 records in 921+1 records out 15461253120 bytes (15 GB, 14 GiB) copied, 130.336 s, 119 MB/s real 2m11.024s user 0m0.000s sys 0m10.673s Telcontar:/data/storage_b/copias_usb_sticks/vacios # time dd if=/dev/sde of=TrascendUBB31Gen1CaplessAmazonFFP_16Gb.img bs=16M status=progress 1895825408 bytes (1.9 GB, 1.8 GiB) copied, 16 s, 118 MB/s^C 115+0 records in 114+0 records out 1912602624 bytes (1.9 GB, 1.8 GiB) copied, 16.4692 s, 116 MB/s real 0m17.185s user 0m0.008s sys 0m2.003s Telcontar:/data/storage_b/copias_usb_sticks/vacios # time dd if=/dev/sde of=TrascendUBB31Gen1CaplessAmazonFFP_16Gb.img bs=16M status=progress 1174405120 bytes (1.2 GB, 1.1 GiB) copied, 10 s, 117 MB/s^C 77+0 records in 76+0 records out 1275068416 bytes (1.3 GB, 1.2 GiB) copied, 19.3953 s, 65.7 MB/s real 0m19.510s user 0m0.000s sys 0m1.112s Telcontar:/data/storage_b/copias_usb_sticks/vacios # time dd if=/dev/sde of=TrascendUBB31Gen1CaplessAmazonFFP_16Gb.img bs=16M status=progress 15401484288 bytes (15 GB, 14 GiB) copied, 129 s, 119 MB/s 921+1 records in 921+1 records out 15461253120 bytes (15 GB, 14 GiB) copied, 130.28 s, 119 MB/s real 2m10.350s user 0m0.004s sys 0m9.971s Telcontar:/data/storage_b/copias_usb_sticks/vacios # With a variation in the command, happens more frequently: Telcontar:/data/storage_b/copias_usb_sticks/vacios # time dd if=/dev/sde of=TrascendUBB31Gen1CaplessAmazonFFP_16G.img bs=16M iflag=direct status=progress 671088640 bytes (671 MB, 640 MiB) copied, 16 s, 41.8 MB/s^C 41+0 records in 40+0 records out 671088640 bytes (671 MB, 640 MiB) copied, 16.4586 s, 40.8 MB/s real 0m16.757s user 0m0.000s sys 0m0.581s Telcontar:/data/storage_b/copias_usb_sticks/vacios # time dd if=/dev/sde of=TrascendUBB31Gen1CaplessAmazonFFP_16G.img bs=16M iflag=direct status=progress 301989888 bytes (302 MB, 288 MiB) copied, 7 s, 41.7 MB/s^C 19+0 records in 18+0 records out 301989888 bytes (302 MB, 288 MiB) copied, 9.27764 s, 32.6 MB/s real 0m9.319s user 0m0.000s sys 0m0.209s Telcontar:/data/storage_b/copias_usb_sticks/vacios # time dd if=/dev/sde of=TrascendUBB31Gen1CaplessAmazonFFP_16G.img bs=16M iflag=direct status=progress 1375731712 bytes (1.4 GB, 1.3 GiB) copied, 12 s, 114 MB/s^C 89+0 records in 88+0 records out 1476395008 bytes (1.5 GB, 1.4 GiB) copied, 13.0748 s, 113 MB/s real 0m13.093s user 0m0.000s sys 0m0.541s Telcontar:/data/storage_b/copias_usb_sticks/vacios # time dd if=/dev/sde of=TrascendUBB31Gen1CaplessAmazonFFP_16G.img bs=16M iflag=direct status=progress 671088640 bytes (671 MB, 640 MiB) copied, 6 s, 112 MB/s^C 43+0 records in 43+0 records out 721420288 bytes (721 MB, 688 MiB) copied, 10.8853 s, 66.3 MB/s real 0m10.967s user 0m0.000s sys 0m0.428s Telcontar:/data/storage_b/copias_usb_sticks/vacios # time dd if=/dev/sde of=TrascendUBB31Gen1CaplessAmazonFFP_16G.img bs=16M iflag=direct status=progress 15401484288 bytes (15 GB, 14 GiB) copied, 133 s, 116 MB/s 921+1 records in 921+1 records out 15461253120 bytes (15 GB, 14 GiB) copied, 133.571 s, 116 MB/s real 2m13.616s user 0m0.008s sys 0m5.409s Telcontar:/data/storage_b/copias_usb_sticks/vacios # - -- Cheers Carlos E. R. (from 15.4 x86_64 at Telcontar) -----BEGIN PGP SIGNATURE----- iHoEARECADoWIQQZEb51mJKK1KpcU/W1MxgcbY1H1QUCZIWx7xwccm9iaW4ubGlz dGFzQHRlbGVmb25pY2EubmV0AAoJELUzGBxtjUfVNzoAnAhFGRa2cAT0ZJ0viGJT 7cspkDyuAJ4wPHIes/icfGA1v5VQYn2M2ccUiA== =6iLL -----END PGP SIGNATURE-----