To qualify what I said in my previous post: "magicdev" is a GNOME program and I have been unable to find how GNOME starts it but I have noticed that it disappears when X is exited.
Michael informs me that "kscd" which is KDE's cd player, has the same side effect on his Yamaha cdwriter. So if it is stopped then the cdrecord succeeds. Doug Gilbert Douglas Gilbert wrote: > > Michael, > RedHat distributions have a horrible little daemon called > "magicdev" that periodically polls CDROMs with a TEST UNIT > READY command. I have a Yamaha 4416S and if it receives > a poll while it is trying to write a CDR it locks up. My machine > needs to be power cycled to clear that lockup. > > Now if that cdwriter had a half decent SCSI target implementation > then it wouldn't lock up like that. However ... > > IMO your solution is to either: > - run cdrecord from the command line > - kill magicdev ["rpm -e magicdev" is a permanent solution] > > The downside of not having magicdev is that CDROMs will no > longer be auto-mounted when you insert them in the drive. > > YMMV. > > All upper level drivers in the Linux SCSI subsystem now > correctly increment a per device "access_count" on open() > calls [and decrement on close()]. So a program like > magicdev could check if there was an existing open() on > a SCSI cdwriter (e.g. by cdrecord) and if so leave the > !@#$ thing alone. > > Doug Gilbert > > Michael White wrote: > > > > Hi all, > > > > I have a problem with cdrecord. Specifically, it will not let me write or > > erase CDs (CD RW, actually). My system: > > > > Redhat 7.1 > > cdrecord 1.11-a12 (latest that I could find - earlier versions also don't > > work on my system) > > HP Omnibook 800 CT (built in SCSI - Symbios logic 53C810 SCSI controller) > > 166 MHz Pentium MMX > > Yamaha 6416 CD RW (SCSI ID 0/0) > > > > Here's the output. The output is the same whether I'm trying to blank or > > trying to write. > > ------------------------------------------------ > > [root@localhost bin]# cdrecord blank=all dev=0,0,0 > > Cdrecord 1.11a12 (i586-pc-linux-gnu) Copyright (C) 1995-2001 J�rg Schilling > > scsidev: '0,0,0' > > scsibus: 0 target: 0 lun: 0 > > Linux sg driver version: 3.1.17 > > Using libscg version 'schily-0.5' > > Device type : Removable CD-ROM > > Version : 2 > > Response Format: 2 > > Capabilities : SYNC > > Vendor_info : 'YAMAHA ' > > Identifikation : 'CRW6416S ' > > Revision : '1.0c' > > Device seems to be: Generic mmc CD-RW. > > Using generic SCSI-3/mmc CD-R driver (mmc_cdr). > > Driver flags : SWABAUDIO > > Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R96R > > Starting to write CD/DVD at speed 2 in write mode for single session. > > Last chance to quit, starting real write in 0 seconds. Operation starts. > > cdrecord: OPC failed. > > cdrecord: Input/output error. blank unit: scsi sendcmd: no error > > CDB: A1 00 00 00 00 00 00 00 00 00 00 00 > > status: 0x2 (CHECK CONDITION) > > Sense Bytes: 70 00 02 00 00 00 00 0A 00 00 00 00 04 01 00 00 > > Sense Key: 0x2 Not Ready, Segment 0 > > Sense Code: 0x04 Qual 0x01 (logical unit is in process of becoming ready) Fru > > 0x0 > > Sense flags: Blk 0 (not valid) > > cmd finished after 13.374s timeout 9600s > > cdrecord: Cannot blank disk, aborting. > > cdrecord: Input/output error. prevent/allow medium removal: scsi sendcmd: no > > error > > CDB: 1E 00 00 00 00 00 > > status: 0x2 (CHECK CONDITION) > > Sense Bytes: 70 00 02 00 00 00 00 0A 00 00 00 00 04 01 00 00 > > Sense Key: 0x2 Not Ready, Segment 0 > > Sense Code: 0x04 Qual 0x01 (logical unit is in process of becoming ready) Fru > > 0x0 > > Sense flags: Blk 0 (not valid) > > cmd finished after 0.011s timeout 40s > > [root@localhost bin]# > > ------------------------------------------------ > > > > >From an LED and device perspective, it looks like someone has yanked > > the reset line on the SCSI bus several seconds after "Operation starts". > > All devices seem to reset. I have a SCSI tape drive on the same SCSI bus, > > and it also acts like it has just been reset whenever this failure occurs > > (i.e. stops what it's doing and re-positions the tape). > > > > Note that I can read from the CD recorder fine, and I have recorded using > > this CD recorder on a different system/OS (CD Writer on my old Atari Falcon). > > In addition, I have no problem accessing (reading and writing) the tape drive, > > so I don't think it's the SCSI bus or cables (which have all worked fine > > before). > > > > Any help would be appreciated. Thanks in advance. > > -- > > Michael White > > [EMAIL PROTECTED] > > > > -- > > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
