Please send your messages to the mailing list as well as to me.

On Fri, 15 Jul 2005, Johannes Clemens wrote:

> hi,
> 
> > What shows up in the system log when you plug in the drive?
> > There should
> > be a line saying something like:
> > 
> >     sr0: scsi3-mmc drive: ...
> > 
> > What else is on that line?
> 
> the lines in /var/log/messages are:
> Jul 15 17:44:21 server kernel: hub.c: new USB device 00:07.2-1, assigned
> address 2
> Jul 15 17:44:21 server kernel: scsi0 : SCSI emulation for USB Mass
> Storage devices
> Jul 15 17:44:21 server kernel:   Vendor: HL-DT-ST  Model: DVDRAM
> GSA-5163D  Rev: A103
> Jul 15 17:44:21 server kernel:   Type:   CD-ROM
> ANSI SCSI revision: 02
> Jul 15 17:44:21 server kernel: Attached scsi CD-ROM sr0 at scsi0,
> channel 0, id 0, lun 0
> Jul 15 17:44:21 server kernel: sr0: scsi-1 drive
> Jul 15 17:44:21 server kernel: WARNING: USB Mass Storage data integrity
> not assured
> Jul 15 17:44:21 server kernel: USB Mass Storage device found at 2

The "sr0: scsi-1 drive" means the Linux thinks your drive is a CD-ROM, not 
a DVD-RAM.

> can you help me?? ;)

Maybe.  This patch may be enough to get things working.  The patch is 
written for 2.4.30 -- I don't have a copy of 2.4.26 here -- but it ought 
to apply okay.

Alan Stern


--- a/drivers/scsi/sr.c 2003-06-13 10:51:36.000000000 -0400
+++ b/drivers/scsi/sr.c 2005-07-15 12:19:06.000000000 -0400
@@ -691,7 +691,7 @@
 
 void get_capabilities(int i)
 {
-       unsigned char cmd[6];
+       unsigned char cmd[10];
        unsigned char *buffer;
        int rc, n;
 
@@ -713,12 +713,12 @@
                printk(KERN_ERR "sr: out of memory.\n");
                return;
        }
-       cmd[0] = MODE_SENSE;
+       memset(cmd, 0, sizeof(cmd));
+       cmd[0] = MODE_SENSE_10;
        cmd[1] = (scsi_CDs[i].device->scsi_level <= SCSI_2) ?
                 ((scsi_CDs[i].device->lun << 5) & 0xe0) : 0;
        cmd[2] = 0x2a;
-       cmd[4] = 128;
-       cmd[3] = cmd[5] = 0;
+       cmd[8] = 128;
        rc = sr_do_ioctl(i, cmd, buffer, 128, 1, SCSI_DATA_READ, NULL);
 
        if (rc) {
@@ -731,7 +731,7 @@
                printk("sr%i: scsi-1 drive\n", i);
                return;
        }
-       n = buffer[3] + 4;
+       n = 8 + buffer[6]*256 + buffer[7];
        scsi_CDs[i].cdi.speed = ((buffer[n + 8] << 8) + buffer[n + 9]) / 176;
        scsi_CDs[i].readcd_known = 1;
        scsi_CDs[i].readcd_cdda = buffer[n + 5] & 0x01;



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