-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, I purchased 3 USB-3 memory sticks, 8GB, for using with the Leap ISOs for install. Trascend JetFrash 790. Just for playing, I dd the empty contents of the stick to a file (twice): Telcontar:/data/storage_b/Isos/stick # time dd if=/dev/sdf of=TrascendJetFlash790_USB31_Gen1_8GB bs=16M status=progress 7558135808 bytes (7.6 GB, 7.0 GiB) copied, 277 s, 27.3 MB/s 450+1 records in 450+1 records out 7558135808 bytes (7.6 GB, 7.0 GiB) copied, 277.022 s, 27.3 MB/s real 4m37.024s user 0m0.021s sys 0m4.293s Telcontar:/data/storage_b/Isos/stick # It goes at a speed of 40MB/s, then 30. I noticed that sometimes the operations pauses for some seconds. And I see this in the log: <0.6> 2020-09-11T23:11:15.001811+02:00 Telcontar kernel - - - [138800.889046] usb 2-2: USB disconnect, device number 6 <0.6> 2020-09-11T23:11:17.173711+02:00 Telcontar kernel - - - [138803.061984] usb 2-2: new SuperSpeed USB device number 7 using xhci_hcd <0.6> 2020-09-11T23:11:17.201679+02:00 Telcontar kernel - - - [138803.091022] usb 2-2: New USB device found, idVendor=8564, idProduct=1000 <0.6> 2020-09-11T23:11:17.201686+02:00 Telcontar kernel - - - [138803.091023] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 <0.6> 2020-09-11T23:11:17.201687+02:00 Telcontar kernel - - - [138803.091024] usb 2-2: Product: Mass Storage Device <0.6> 2020-09-11T23:11:17.201687+02:00 Telcontar kernel - - - [138803.091025] usb 2-2: Manufacturer: JetFlash <0.6> 2020-09-11T23:11:17.201688+02:00 Telcontar kernel - - - [138803.091025] usb 2-2: SerialNumber: 21MAV2HZW8YQVPH7 <0.6> 2020-09-11T23:11:17.205673+02:00 Telcontar kernel - - - [138803.094352] usb-storage 2-2:1.0: USB Mass Storage device detected <0.6> 2020-09-11T23:11:17.205680+02:00 Telcontar kernel - - - [138803.094507] scsi host11: usb-storage 2-2:1.0 <1.6> 2020-09-11T23:11:17.235554+02:00 Telcontar mtp-probe - - - checking bus 2, device 7: "/sys/devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb2/2-2" <1.6> 2020-09-11T23:11:17.235856+02:00 Telcontar mtp-probe - - - bus: 2, device: 7 was not an MTP device <0.5> 2020-09-11T23:11:18.422416+02:00 Telcontar kernel - - - [138804.313168] scsi 11:0:0:0: Direct-Access JetFlash Transcend 8GB 1100 PQ: 0 ANSI: 6 <0.6> 2020-09-11T23:11:18.422427+02:00 Telcontar kernel - - - [138804.313209] scsi 11:0:0:0: alua: supports implicit and explicit TPGS <0.6> 2020-09-11T23:11:18.422428+02:00 Telcontar kernel - - - [138804.313210] scsi 11:0:0:0: alua: No target port descriptors found <0.5> 2020-09-11T23:11:18.422429+02:00 Telcontar kernel - - - [138804.313338] sd 11:0:0:0: Attached scsi generic sg6 type 0 <0.5> 2020-09-11T23:11:18.425670+02:00 Telcontar kernel - - - [138804.314263] sd 11:0:0:0: [sdf] 14761984 512-byte logical blocks: (7.56 GB/7.04 GiB) <0.5> 2020-09-11T23:11:18.425676+02:00 Telcontar kernel - - - [138804.315124] sd 11:0:0:0: [sdf] Write Protect is off <0.7> 2020-09-11T23:11:18.425677+02:00 Telcontar kernel - - - [138804.315126] sd 11:0:0:0: [sdf] Mode Sense: 43 00 00 00 <0.5> 2020-09-11T23:11:18.425678+02:00 Telcontar kernel - - - [138804.315974] sd 11:0:0:0: [sdf] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA <0.6> 2020-09-11T23:11:18.433677+02:00 Telcontar kernel - - - [138804.321671] sdf: sdf1 <0.5> 2020-09-11T23:11:18.433684+02:00 Telcontar kernel - - - [138804.324651] sd 11:0:0:0: [sdf] Attached SCSI removable disk <0.6> 2020-09-11T23:13:46.353759+02:00 Telcontar kernel - - - [138952.243607] usb 2-2: reset SuperSpeed USB device number 7 using xhci_hcd <0.6> 2020-09-11T23:15:38.993679+02:00 Telcontar kernel - - - [139064.883986] usb 2-2: reset SuperSpeed USB device number 7 using xhci_hcd <0.6> 2020-09-11T23:17:33.681695+02:00 Telcontar kernel - - - [139179.572404] usb 2-2: reset SuperSpeed USB device number 7 using xhci_hcd <3.6> 2020-09-11T23:21:16.761897+02:00 Telcontar dbus-daemon 4171 - - [session uid=1000 pid=4171] Activating service name='org.freedesktop.thumbnails.Thumbnailer1' requested by ':1.12' (uid=1000 pid=4250 comm="Thunar --sm-client-id 25b4ecb72-97b6-45d0-9e54-588") <3.6> 2020-09-11T23:21:16.899504+02:00 Telcontar dbus-daemon 4171 - - [session uid=1000 pid=4171] Successfully activated service 'org.freedesktop.thumbnails.Thumbnailer1' <0.6> 2020-09-11T23:23:27.985695+02:00 Telcontar kernel - - - [139533.877402] usb 2-2: reset SuperSpeed USB device number 7 using xhci_hcd <0.6> 2020-09-11T23:24:39.665681+02:00 Telcontar kernel - - - [139605.557616] usb 2-2: reset SuperSpeed USB device number 7 using xhci_hcd <0.6> 2020-09-11T23:26:05.681694+02:00 Telcontar kernel - - - [139691.573898] usb 2-2: reset SuperSpeed USB device number 7 using xhci_hcd I mean those "reset SuperSpeed USB device number 7". What is that? I didn't notice log entries while writing, which goes at about 10 Mbits/s - -- Cheers Carlos E. R. (from 15.1 x86_64 at Telcontar) -----BEGIN PGP SIGNATURE----- iHoEARECADoWIQQZEb51mJKK1KpcU/W1MxgcbY1H1QUCX1yrcxwccm9iaW4ubGlz dGFzQHRlbGVmb25pY2EubmV0AAoJELUzGBxtjUfVPAwAn2BT47wFjVbdlVN27vTe HrvlDs8HAJwOnuFCOMlfQ2R5Rv+qIBgzHegt3Q== =/EJK -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org