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]
