Solaris

Volmgt Node: /vol/dev/aliases/rmdisk0
        Logical Node: /dev/rdsk/c2t0d0p0
        Physical Node: /pci@0,0/pci1028,211@1a,7/storage@3/disk@0,0
        Connected Device: NS                 1.00
        Device Type: Removable

int fd, res, i;

    const int t_length = 512; // 512 bytes transferred
    const unsigned char blocks = 1; // Blocks transferred
    unsigned char rdCmdBlk[SCSI_CDB_LEN] = { 0x28, // Command
    0, 0, 0, 0, 0, 0, 0, 0, 0 };
    unsigned char sense_b[SENSE_BUFF_LEN];
    sg_io_hdr_t io_hdr;

    // Open device
    fd = open(deviceName , O_RDWR|O_SYNC);
    
    printf("fd in write is : %d\n" , fd);
    
    // Prepare SCSI READ (10) command
    rdCmdBlk[2] = 0x00; // LBA
    rdCmdBlk[3] = 0x00; // LBA
    rdCmdBlk[4] = 0x00; // LBA
    rdCmdBlk[5] = 0x66; // LBA
    rdCmdBlk[8] = blocks; // transfer length

    // Prepare the sg_io_hdr_t structure
    memset(&io_hdr, 0, sizeof(sg_io_hdr_t));
    io_hdr.interface_id = 'S';
    io_hdr.cmd_len = sizeof(rdCmdBlk);
    io_hdr.mx_sb_len = sizeof(sense_b);
    io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
    io_hdr.dxfer_len = t_length;
    io_hdr.dxferp = dataTxChallenge;
    io_hdr.cmdp = rdCmdBlk;
    io_hdr.sbp = sense_b;
    io_hdr.timeout = 5000;

    // Sends the command to device
    if ((res = ioctl(fd, SG_IO, &io_hdr)) < 0) 
    {
        
        close(fd);
}




printf("IOCTL RESULT :    %d",res);

printf("ERROR NO :    %d",errno);

#define    ENOTTY    25    /* Inappropriate ioctl for device */

man uscsi

#include <fcntl.h>
#include </usr/include/sys/scsi/impl/uscsi.h>

#define deviceName "/vol/dev/aliases/rmdisk0"
#define SCSI_CDB_LEN 10
#define SENSE_BUFF_LEN 18

int main()
{
    int fd, res, i;
    unsigned char data[512]={0xe1,0xe2,0xe3,0xe4};
    const int t_length = 512; // 512 bytes transferred
    const unsigned char blocks = 1; // Blocks transferred
    unsigned char rdCmdBlk[SCSI_CDB_LEN] = { 0x2a, // Command
    0, 0, 0, 0, 0, 0, 0, 0, 0 };
    unsigned char sense_b[SENSE_BUFF_LEN];
    struct uscsi_cmd    *cmd1;
    
    // Open device
    fd = open(deviceName , O_RDWR);
    
    printf("fd in write is : %d\n" , fd);
    
    // Prepare SCSI  (10) command
    rdCmdBlk[2] = 0x00; // LBA
    rdCmdBlk[3] = 0x00; // LBA
    rdCmdBlk[4] = 0x00; // LBA
    rdCmdBlk[5] = 0x42; // LBA
    rdCmdBlk[8] = blocks; // transfer length
  
    
    cmd1->uscsi_flags= USCSI_WRITE;
    cmd1->uscsi_buflen =t_length;
    cmd1->uscsi_bufaddr =  data;
    cmd1->uscsi_timeout = 5000;
    cmd1->uscsi_cdb = (caddr_t) &rdCmdBlk;
    cmd1->uscsi_cdblen = SCSI_CDB_LEN;




    

    // Sends the command to device
    if ((res = ioctl(fd,USCSICMD,&cmd1)) < 0) 
    {
        
        close(fd);

printf("IOCTL FAILS:    %d",res);
        return -1;
    }
printf("IOCTL SUCCESS :     %d",res);
    
    
         close(fd);
        return 0;


}