Article 8282 (28 more) in alt.cd-rom:
From: kkaempf@didymus.rmi.de (Klaus Kaempf)
Subject: Re: Sun/Solaris & Standard CD ROM Drives
Message-ID: <C31xBC.LHt@didymus.rmi.de>
Organization: Klaus Kaempf Softwareentwicklung
References: <1m196oINNls2@usenet.INS.CWRU.Edu> <1me3h4INNj73@meaddata.meaddata.com>
Date: Fri, 26 Feb 1993 10:33:11 GMT
Lines: 147


Hi folks !

This debate about CDROM drives and Suns is as old as this newsgroup.
There is a cheap solution (at least for SunOS 4.x, don't know about
Solaris 2 yet) and source is included below.
You still can't boot with the drive since the *stupid* OpenProm Boot
code doesn't set the record lenght to 512bytes. But what you can do
is compile the following program (it expects /dev/rsr0 as the drive,
change line 22 if it's something else) and put it in your 'rc.local'.

Ttttttthats all folks !

Klaus
------------->--cut here--<----------------
/*
 * setreclen.c
 *
 * set record length of CDROM to 512bytes
 *
 * This came along the net a while ago
 * I cleaned it up and added some debug code
 * Have fun !
 * Klaus Kaempf, kkaempf@didymus.rmi.de
 *
 */

# include <sys/types.h>
# include <sys/buf.h>
# include <sun/dkio.h>
# include <scsi/targets/srdef.h>
# include <scsi/impl/uscsi.h>
# include <strings.h>

# include <stdio.h>

char cdrom[] =  "/dev/rsr0";

extern char *   cdrom_status();

/* group 0 commands */

#define TEST            0x00
#define REZERO          0x01
#define SENSEREQ        0x03
#define READ            0x08
#define SEEK            0x0b
#define NOP             0x0d
#define INQ             0x12
#define MODESEL         0x15
#define RESERVE         0x16
#define RELEASE         0x17
#define MODESENSE       0x1a
#define STARTSTOP       0x1b
#define DIAGRCV         0x1c
#define DIAGSND         0x1d
#define MEDIUMLOCK      0x1e

/* group 1 commands */

#define READCAP         0x25
#define READEXT         0x28
#define SEEKEXT         0x2b

/* group 6 commands */

#define AUDIOTRACK      0xc0
#define AUDIOPLAY       0xc1
#define AUDIOSTILL      0xc2
#define AUDIOSTOP       0xc3
#define EJECT           0xc4
#define CLOSE           0xc5
#define AUDIOSUB        0xc6
#define AUDIODISK       0xc7
#define ROMMODE         0xc8

/***/

#define CMDLEN(cmd) ((cmd >= 0x20) ? 10 :  6)

/***/
#define UBUFLEN 4096

static void showhex(why, what, len)
char *why;
unsigned char *what;
int len;
{
        fprintf(stderr,"Showhex %s\n", why);
        while (len > 0) {
                fprintf(stderr,"%02x ", *what++);
                len--;
        }
        fprintf(stderr,"\n");
        return;
}


main() {
int                     fd;
int                     i;
struct uscsi_cmd        ucmd;
char *                  s_command;
char *                  s_buffer;

        if ((fd = open(cdrom, 0)) == -1) {
                fprintf(stderr, "open: ");
                perror(cdrom);
                exit(1);
        }
        s_command = (char *) malloc(10);
        if (s_command == NULL) {
                printf("malloc error (command)\n");
                exit(-1);
        }
        bzero(s_command, 10);
        s_buffer = (char *) malloc(UBUFLEN);
        if (s_buffer == NULL) {
                printf("malloc error (buffer)\n");
                exit(-1);
        }
        bzero(s_buffer, UBUFLEN);
        s_command[0] = MODESEL;
        s_command[1] = 0x10;
        s_command[4] = 12;
        s_buffer[3] = 0x08;
        s_buffer[10] = 0x02;
        ucmd.uscsi_cdb = s_command;
        ucmd.uscsi_cdblen = 6;
        ucmd.uscsi_bufaddr = s_buffer;
        ucmd.uscsi_buflen = UBUFLEN;
        ucmd.uscsi_flags = USCSI_WRITE;
        i = ioctl(fd, USCSICMD, ucmd);
#if 1
        showhex("ucmd", &ucmd, sizeof ucmd);
        showhex("s_buffer", s_buffer, 256);
#endif
        close(fd);
        exit(i);
}

-------->--and here --<---------------
-- 
Klaus Kaempf                 E-Mail: kkaempf@didymus.rmi.de
Jakobstr. 181                Fax:    0241-403407
D-5100 Aachen                Voice:  0241-403446