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ltocapacity.c
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ltocapacity.c
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <scsi/sg.h>
int main(int argc, char *argv[])
{
int fd;
if (argc != 2) {
printf("Usage: %s <path to sg device of LTO drive>\n", argv[0]);
return 1;
}
fd = open(argv[1], O_RDWR);
if (fd < 0) {
puts("Error!");
return 1;
}
struct sg_io_hdr scsi_cmd;
unsigned char cmd[] = {0x4D, 0x00, 0x31 | 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x24, 0x00};
unsigned char dxfer[36];
memset(&scsi_cmd, 0, sizeof(scsi_cmd));
memset(&dxfer, 0, sizeof(dxfer));
scsi_cmd.interface_id = 'S';
scsi_cmd.dxfer_direction = SG_DXFER_FROM_DEV;
scsi_cmd.cmd_len = sizeof(cmd);
scsi_cmd.cmdp = cmd;
scsi_cmd.dxfer_len = sizeof(dxfer);
scsi_cmd.dxferp = dxfer;
ioctl(fd, SG_IO, &scsi_cmd);
unsigned int tmp;
tmp = dxfer[11] | (dxfer[10] << 8) | (dxfer[9] << 16) | (dxfer[8] << 24);
printf("Remaining (Partition 0): %u MiB / ", tmp);
tmp = dxfer[27] | (dxfer[26] << 8) | (dxfer[25] << 16) | (dxfer[24] << 24);
printf("%d MiB\n", tmp);
tmp = dxfer[19] | (dxfer[18] << 8) | (dxfer[17] << 16) | (dxfer[16] << 24);
printf("Remaining (Partition 1): %u MiB / ", tmp);
tmp = dxfer[35] | (dxfer[34] << 8) | (dxfer[33] << 16) | (dxfer[32] << 24);
printf("%d MiB\n", tmp);
close(fd);
return 0;
}