Re: 2.4.27rc2, DVD-RW support broke DVD-RAM writes

[Pat LaVarre]

> what you see in 2.4.27-rc3 when you try:
> sudo blockdev --getro /dev/hd*

Sorry, never mind, I can now reproduce this effect myself, because 
Michael Tilelli kindly lent me a PATAPI DVD-RAM drive.

We must have an asymmetry in 2.4 drivers/ide/ide-cd.c vs. 
drivers/scsi/sr.c.  I see 2.4.26 work, but then 2.4.27-rc3 chokes:

$ uname -msr
Linux 2.4.27-rc4 i686
$
$ sudo rrd scan /dev/hdd
/dev/hdd is MATSHITA DVD-RAM A127 not RRD
$
$ sudo dd if=/dev/hdd bs=32K skip=0 count=1 | hexdump -C
00000000  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  
|................|
*
1+0 records in
1+0 records out
00008000
$ sudo dd of=/dev/hdd bs=32K skip=0 count=1 <xae.bin
dd: opening `/dev/hdd': Read-only file system
$ sudo blockdev --getro /dev/hdd
0
$

Pat LaVarre

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