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#include <scsi/sg.h>
#define READ10_REPLY_LEN 512
#define READ10_CMD_LEN 10
// read 0x102 blocks from block # 0x3040506
// [just to to you where the fields are]
..............
unsigned char r10CmdBlk [READ10_CMD_LEN] =
{0x28, 0, 3, 4, 5, 6, 0, 1, 2, 0};
sg_io_hdr_t io_hdr;
unsigned char inBuff[READ10_REPLY_LEN];
unsigned char sense_buffer[32];
/* Prepare READ_10 command */
memset(&io_hdr, 0, sizeof(sg_io_hdr_t));
io_hdr.interface_id = 'S';
io_hdr.cmd_len = sizeof(r10CmdBlk);
io_hdr.mx_sb_len = sizeof(sense_buffer);
io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
io_hdr.dxfer_len = READ10_REPLY_LEN;
io_hdr.dxferp = inBuff;
io_hdr.cmdp = r10CmdBlk;
io_hdr.sbp = sense_buffer;
io_hdr.timeout = 20000; /* 20000 millisecs == 20 seconds */
if (ioctl(sg_fd, SG_IO, &io_hdr) < 0) {
perror("READ_10 SG_IO ioctl error");
.....
}
// block should now be in 'inBuff'
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