Re: 4.7GB DVD-RAM geometry wrong?

[Jens Axboe]

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On Wed, Aug 15 2001, Joseph N. Hall wrote:
> I don't know if I'm doing this the right way or not.  I did spend an hour
> or three googling for "linux dvd-ram" and the like, and all I came up with
> was a bunch of 2.2-specific stuff, until I found a usenet posting that
> said in effect "you can write to /dev/scd0".  So I gave that a try
> and it worked.  Sort of.
> 
> I have a Panasonic DVD-RAM, LF-D201 (SCSI 4.7/9.4GB).  I put in a
> 4.7GB type II cartridge (that's a single-sided disk), did 'mkfs 
> /dev/scd0' and then mounted it, and ... I have a 2.2GB disk!

Attached patch should fix it, Linus please apply.

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Jens Axboe

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--- /opt/kernel/linux-2.4.9-pre4/drivers/scsi/sr_ioctl.c	Thu Jul  5 20:28:17 2001
+++ drivers/scsi/sr_ioctl.c	Wed Aug 15 13:15:21 2001
@@ -545,7 +545,7 @@
 
 	switch (cmd) {
 	case BLKGETSIZE:
-		return put_user(scsi_CDs[target].capacity >> 1, (long *) arg);
+		return put_user(scsi_CDs[target].capacity, (long *) arg);
 	case BLKROSET:
 	case BLKROGET:
 	case BLKRASET:

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