USB libusb | Intenso externe SSD wird nicht gefunden, wenn komplett vom Strom genommen

Code:

[     2.015263] usb 1-1.5: new high-speed USB device number 4 using dwc_otg

[    2.024849] systemd[1]: Cannot add dependency job for unit regenerate_ssh_host_keys.service, ignoring: Unit regenerate_ssh_host_keys.service failed to load: No such file or directory.

[    2.028515] systemd[1]: Starting Forward Password Requests to Wall Directory Watch.

[    2.028857] systemd[1]: Started Forward Password Requests to Wall Directory Watch.

[    2.028935] systemd[1]: Starting Remote File Systems (Pre).

[    2.146328] usb 1-1.5: New USB device found, idVendor=152d, idProduct=0579

[    2.146341] usb 1-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=3

[    2.146349] usb 1-1.5: Product: USB Mass Storage

[    2.146357] usb 1-1.5: Manufacturer: JMicron

[    2.146365] usb 1-1.5: SerialNumber: 152D00579000

[    2.150058] usb-storage 1-1.5:1.0: USB Mass Storage device detected

[    2.154684] scsi host0: usb-storage 1-1.5:1.0

[    2.200072] fuse init (API version 7.26)

[    2.240728] i2c /dev entries driver

[    2.481409] systemd-udevd[150]: starting version 215

[    2.872393] rpi-ft5406 rpi_ft5406: Probing device

[    2.874663] input: FT5406 memory based driver as /devices/virtual/input/input0

[    3.077782] gpiomem-bcm2835 3f200000.gpiomem: Initialised: Registers at 0x3f200000

[    3.078544] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)

[    3.206425] snd-hifiberry-digi soc:sound: ASoC: CPU DAI (null) not registered - will retry

[    3.212862] scsi 0:0:0:0: Direct-Access     JMICRON  JMS579                PQ: 0 ANSI: 6

[    3.214744] snd-hifiberry-digi soc:sound: ASoC: CPU DAI (null) not registered - will retry

[    3.215394] sd 0:0:0:0: [sda] Unit Not Ready

[    3.215410] sd 0:0:0:0: [sda] Sense Key : 0x5 [current] 

[    3.215420] sd 0:0:0:0: [sda] ASC=0x20 ASCQ=0x0 

[    3.217059] sd 0:0:0:0: [sda] Read Capacity(10) failed: Result: hostbyte=0x00 driverbyte=0x08

[    3.217074] sd 0:0:0:0: [sda] Sense Key : 0x5 [current] 

[    3.217084] sd 0:0:0:0: [sda] ASC=0x20 ASCQ=0x0 

[    3.217384] sd 0:0:0:0: [sda] Write Protect is off

[    3.217397] sd 0:0:0:0: [sda] Mode Sense: 00 00 00 00

[    3.217668] sd 0:0:0:0: [sda] Asking for cache data failed

[    3.217678] sd 0:0:0:0: [sda] Assuming drive cache: write through

[    3.221771] sd 0:0:0:0: [sda] Unit Not Ready

[    3.221793] sd 0:0:0:0: [sda] Sense Key : 0x5 [current] 

[    3.221803] sd 0:0:0:0: [sda] ASC=0x20 ASCQ=0x0 

[    3.223906] sd 0:0:0:0: [sda] Read Capacity(10) failed: Result: hostbyte=0x00 driverbyte=0x08

[    3.223926] sd 0:0:0:0: [sda] Sense Key : 0x5 [current] 

[    3.223936] sd 0:0:0:0: [sda] ASC=0x20 ASCQ=0x0 

[    3.224821] sd 0:0:0:0: [sda] Attached SCSI disk

Code:

/* usbreset -- send a USB port reset to a USB device */



#include <stdio.h>

#include <unistd.h>

#include <fcntl.h>

#include <errno.h>

#include <sys/ioctl.h>



#include <linux/usbdevice_fs.h>





int main(int argc, char **argv)

{

    const char *filename;

    int fd;

    int rc;



    if (argc != 2) {

        fprintf(stderr, "Usage: usbreset device-filename\n");

        return 1;

    }

    filename = argv[1];



    fd = open(filename, O_WRONLY);

    if (fd < 0) {

        perror("Error opening output file");

        return 1;

    }



    printf("Resetting USB device %s\n", filename);

    rc = ioctl(fd, USBDEVFS_RESET, 0);

    if (rc < 0) {

        perror("Error in ioctl");

        return 1;

    }

    printf("Reset successful\n");



    close(fd);

    return 0;

}