Having trouble with SCSI emulation
I am having problems getting SCSI emulation working on Slackware 10.2 (Kernel Version 2.4.31). I had SCSI emulation working before, but I had to reinstall a few weeks ago and did not write down how got it to work.
I can mount media that is in my CD-RW using the following mount -t iso9660 /dev/hdc /mnt/cdrom I also try to use cdrecord I keep getting the following errors: michael@toroidal:/dev$ cdrecord -scanbus Cdrecord-Clone 2.01 (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jörg Schilling cdrecord: No such file or directory. Cannot open '/dev/pg*'. Cannot open SCSI driver. cdrecord: For possible targets try 'cdrecord -scanbus'. cdrecord: For possible transport specifiers try 'cdrecord dev=help'. I'm thinking that SCSI emulation is not working so I modified my lilo and fstab files. Here is a snippet of my lilo.conf: Start LILO global section boot = /dev/hda message = /boot/boot_message.txt prompt timeout = 1200 # Override dangerous defaults that rewrite the partition table: change-rules reset # Normal VGA console ... # End LILO global section # Linux bootable partition config begins image = /boot/vmlinuz root = /dev/hda2 append="hdc=ide-scsi" label = Linux read-only append="apm=power-off" # Linux bootable partition config ends Here is a copy of my fstab file: /dev/hda1 swap swap defaults 0 0 /dev/hda2 / reiserfs defaults 1 1 /dev/cdrom /mnt/cdrom iso9660 noauto,user,ro 0 0 /dev/fd0 /mnt/floppy auto noauto,users 0 0 devpts /dev/pts devpts gid=5,mode=620 0 0 proc /proc proc defaults 0 0 Ran lilo and rebooted After making the modification above I tried symlink ln -s sr0 cdrw and got the following: ln: `cdrw': File exists I tried the cdrecord -scanbus command (as user and /) again a still got the error above: Cdrecord-Clone 2.01 (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jörg Schilling cdrecord: No such file or directory. Cannot open '/dev/pg*'. Cannot open SCSI driver. cdrecord: For possible targets try 'cdrecord -scanbus'. cdrecord: For possible transport specifiers try 'cdrecord dev=help'. If want to mount a CD I still have to use hdc, so I'm assuming scsi emulation is still not working properly Here is my dmesg: Linux version 2.4.31 (root@tree) (gcc version 3.3.5) #6 Sun Jun 5 19:04:47 PDT 2005 BIOS-provided physical RAM map: BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved) BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved) BIOS-e820: 0000000000100000 - 000000000fec0000 (usable) BIOS-e820: 000000000fec0000 - 000000000fef8000 (ACPI data) BIOS-e820: 000000000fef8000 - 000000000ff00000 (ACPI NVS) BIOS-e820: 00000000ffb80000 - 00000000ffc00000 (reserved) BIOS-e820: 00000000fff00000 - 0000000100000000 (reserved) 254MB LOWMEM available. On node 0 totalpages: 65216 zone(0): 4096 pages. zone(1): 61120 pages. zone(2): 0 pages. Kernel command line: BOOT_IMAGE=Linux ro root=302 apm=power-off Initializing CPU#0 Detected 1096.693 MHz processor. Console: colour VGA+ 80x25 Calibrating delay loop... 2188.90 BogoMIPS Memory: 254816k/260864k available (1832k kernel code, 5660k reserved, 607k data, 120k init, 0k highmem) Dentry cache hash table entries: 32768 (order: 6, 262144 bytes) Inode cache hash table entries: 16384 (order: 5, 131072 bytes) Mount cache hash table entries: 512 (order: 0, 4096 bytes) Buffer cache hash table entries: 16384 (order: 4, 65536 bytes) Page-cache hash table entries: 65536 (order: 6, 262144 bytes) CPU: L1 I cache: 16K, L1 D cache: 16K CPU: L2 cache: 128K CPU: After generic, caps: 0383f9ff 00000000 00000000 00000000 CPU: Common caps: 0383f9ff 00000000 00000000 00000000 CPU: Intel Celeron (Coppermine) stepping 0a Enabling fast FPU save and restore... done. Enabling unmasked SIMD FPU exception support... done. Checking 'hlt' instruction... OK. POSIX conformance testing by UNIFIX mtrr: v1.40 (20010327) Richard Gooch (rgooch@atnf.csiro.au) mtrr: detected mtrr type: Intel PCI: PCI BIOS revision 2.10 entry at 0xfda95, last bus=1 PCI: Using configuration type 1 PCI: Probing PCI hardware PCI: Probing PCI hardware (bus 00) Transparent bridge - Intel Corp. 82801AA PCI Bridge PCI: Using IRQ router PIIX/ICH [8086/2410] at 00:1f.0 Linux NET4.0 for Linux 2.4 Based upon Swansea University Computer Society NET3.039 Initializing RT netlink socket Starting kswapd VFS: Disk quotas vdquot_6.5.1 Journalled Block Device driver loaded pty: 512 Unix98 ptys configured Serial driver version 5.05c (2001-07-08) with HUB-6 MANY_PORTS MULTIPORT SHARE_IRQ SERIAL_PCI enabled ttyS00 at 0x03f8 (irq = 4) is a 16550A Real Time Clock Driver v1.10f Floppy drive(s): fd0 is 1.44M FDC 0 is a post-1991 82077 RAMDISK driver initialized: 16 RAM disks of 7777K size 1024 blocksize loop: loaded (max 8 devices) Uniform Multi-Platform E-IDE driver Revision: 7.00beta4-2.4 ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx ICH: IDE controller at PCI slot 00:1f.1 ICH: chipset revision 2 ICH: not 100% native mode: will probe irqs later ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:DMA, hdb:pio ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:DMA, hdd:pio hda: WDC WD200BB-75CLB0, ATA DISK drive blk: queue c03af460, I/O limit 4095Mb (mask 0xffffffff) hdc: LG CD-RW CED-8080B, ATAPI CD/DVD-ROM drive ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 ide1 at 0x170-0x177,0x376 on irq 15 hda: attached ide-disk driver. hda: host protected area => 1 hda: 39102336 sectors (20020 MB) w/2048KiB Cache, CHS=2434/255/63, UDMA(66) hdc: attached ide-cdrom driver. hdc: ATAPI 32X CD-ROM CD-R/RW drive, 2048kB Cache, DMA Uniform CD-ROM driver Revision: 3.12 Partition check: hda: hda1 hda2 SCSI subsystem driver Revision: 1.00 kmod: failed to exec /sbin/modprobe -s -k scsi_hostadapter, errno = 2 kmod: failed to exec /sbin/modprobe -s -k scsi_hostadapter, errno = 2 kmod: failed to exec /sbin/modprobe -s -k scsi_hostadapter, errno = 2 md: linear personality registered as nr 1 md: raid0 personality registered as nr 2 md: raid1 personality registered as nr 3 md: raid5 personality registered as nr 4 raid5: measuring checksumming speed 8regs : 1815.200 MB/sec 32regs : 1044.400 MB/sec pIII_sse : 2212.000 MB/sec pII_mmx : 2482.800 MB/sec p5_mmx : 2591.600 MB/sec raid5: using function: pIII_sse (2212.000 MB/sec) md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27 md: Autodetecting RAID arrays. md: autorun ... md: ... autorun DONE. LVM version 1.0.8(17/11/2003) Initializing Cryptographic API NET4: Linux TCP/IP 1.0 for NET4.0 IP Protocols: ICMP, UDP, TCP, IGMP IP: routing cache hash table of 2048 buckets, 16Kbytes TCP: Hash tables configured (established 16384 bind 32768) Linux IP multicast router 0.06 plus PIM-SM NET4: Unix domain sockets 1.0/SMP for Linux NET4.0. FAT: bogus logical sector size 0 UMSDOS: msdos_read_super failed, mount aborted. FAT: bogus logical sector size 0 FAT: bogus logical sector size 0 reiserfs: found format "3.6" with standard journal reiserfs: checking transaction log (device ide0(3,2)) ... for (ide0(3,2)) ide0(3,2):Using r5 hash to sort names VFS: Mounted root (reiserfs filesystem) readonly. Freeing unused kernel memory: 120k freed Adding Swap: 506008k swap-space (priority -1) apm: BIOS version 1.2 Flags 0x03 (Driver version 1.16) Linux agpgart interface v0.99 (c) Jeff Hartmann agpgart: Maximum main memory to use for agp memory: 202M agpgart: Detected an Intel i810 Chipset. agpgart: AGP aperture is 64M @ 0xf8000000 ne2k-pci.c:v1.02 10/19/2000 D. Becker/P. Gortmaker http://www.scyld.com/network/ne2k-pci.html PCI: Found IRQ 10 for device 01:0b.0 PCI: Sharing IRQ 10 with 00:1f.2 PCI: Sharing IRQ 10 with 01:0a.1 eth0: RealTek RTL-8029 found at 0xdf80, IRQ 10, 00:C0:F0:5C:0C:E5. scsi0 : SCSI host adapter emulation for IDE ATAPI devices Linux Kernel Card Services 3.1.22 options: [pci] [cardbus] [pm] isapnp: Scanning for PnP cards... isapnp: No Plug & Play device found Intel ISA PCIC probe: not found. Databook TCIC-2 PCMCIA probe: not found. ds: no socket drivers loaded! parport0: PC-style at 0x378 [PCSPP,TRISTATE,EPP] lp0: using parport0 (polling). PCI: Found IRQ 11 for device 01:08.0 PCI: Sharing IRQ 11 with 00:01.0 PCI: Sharing IRQ 11 with 01:0a.2 paride: version 1.06 installed (parport) pg: pg version 1.02, major 97 pg0: Autoprobe failed pg: No ATAPI device detected paride: version 1.06 installed (parport) pg: pg version 1.02, major 97 pg0: Autoprobe failed pg: No ATAPI device detected paride: version 1.06 installed (parport) pg: pg version 1.02, major 97 pg0: Autoprobe failed pg: No ATAPI device detected paride: version 1.06 installed (parport) pg: pg version 1.02, major 97 pg0: Autoprobe failed pg: No ATAPI device detected hdc: command error: status=0x51 { DriveReady SeekComplete Error } hdc: command error: error=0x50 end_request: I/O error, dev 16:00 (hdc), sector 64 isofs_read_super: bread failed, dev=16:00, iso_blknum=16, block=32 paride: version 1.06 installed (parport) pg: pg version 1.02, major 97 pg0: Autoprobe failed pg: No ATAPI device detected paride: version 1.06 installed (parport) pg: pg version 1.02, major 97 pg0: Autoprobe failed pg: No ATAPI device detected paride: version 1.06 installed (parport) pg: pg version 1.02, major 97 pg0: Autoprobe failed pg: No ATAPI device detected paride: version 1.06 installed (parport) pg: pg version 1.02, major 97 pg0: Autoprobe failed pg: No ATAPI device detected paride: version 1.06 installed (parport) pg: pg version 1.02, major 97 pg0: Autoprobe failed pg: No ATAPI device detected paride: version 1.06 installed (parport) pg: pg version 1.02, major 97 pg0: Autoprobe failed pg: No ATAPI device detected paride: version 1.06 installed (parport) pg: pg version 1.02, major 97 pg0: Autoprobe failed pg: No ATAPI device detected paride: version 1.06 installed (parport) pg: pg version 1.02, major 97 pg0: Autoprobe failed pg: No ATAPI device detected paride: version 1.06 installed (parport) pg: pg version 1.02, major 97 pg0: Autoprobe failed pg: No ATAPI device detected paride: version 1.06 installed (parport) pg: pg version 1.02, major 97 pg0: Autoprobe failed pg: No ATAPI device detected paride: version 1.06 installed (parport) pg: pg version 1.02, major 97 pg0: Autoprobe failed pg: No ATAPI device detected paride: version 1.06 installed (parport) pg: pg version 1.02, major 97 pg0: Autoprobe failed pg: No ATAPI device detected I searched on google and LQ.org I can't find any answers. Does anybody know what steps I am missing? Thanks |
try (as root)changing the user group on the sg devices (the numeric ones) ,eg sg0 sg1 etc,to enable cdrom group to use them and then change permissions to enable read/write access to the cdrom group..making sure you are in the cdrom group of course.Also make sure your cdrom drive links to /dev/sr0.Im sure the info on how to do all this is to be found under linux howtos,at least it was under slackware 10.1.hope this gets you going.
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Thanks, I'll check it out.
In case anybody else are having the same problems, I'll post the solution as soon as I get it working. |
O.K. now, I have found my problem and everything works fine. Here is what went wrong.
A few weeks ago I had changed my lilo.conf file so my computer would shutdown automatically (instead of having to wait and hit the power button my PC). So my lilo.conf file was this: image = /boot/vmlinuz root = /dev/hda2 append="hdc=ide-scsi" label = Linux read-only append="apm=power-off" # Linux bootable partition config ends When I ran lilo got a message something like this: Double append on lines 39 and 42 It didn't say it was an error, it just mentioned that append was mentioned twice. I rewrote my lilo.conf file to this: image = /boot/vmlinuz root = /dev/hda2 label = Linux read-only append="apm=power-off hdc=ide-scsi" # Linux bootable partition config ends Ran lilo, rebooted, and everything works fine. I hope this is helpful to somebody else in the future Note: I also changed my permissions on sr0 device, I don't think that this was the problem though because I tried use cdrecord under root, and it still did not work before the change in my lilo.conf file. However, I guess it could've been the combination of the two. |
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