July 2002 - Roundtable

SCSI emulation returns... burner works
by millward 08 Jul '02

08 Jul '02

In grub.conf I added hdc=ide-scsi and Red Hat automatically updated fstab during boot. cdrecord -scanbus showed a device at 0,0,0 I had prepared a file in /usr/LTSP using mkisofs -r -J -o /usr/LTSP/ltsp.iso /usr/LTSP ( got this from an English Linux magazine. I can never understand man documents ) So I tried to burn a CD using cdrecord -v dev=0,0,0 speed=4 /usr/LTSP/ltsp.iso and it looked good. I booted into ms windows and the CD is readable under DOS too. Thanks for all the advice. I would never have figured this out on my own. Strange that in 7.2, grub didn't need the statement hdc=ide-scsi, but I quess things change all the time. Thanks again!

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Re: [RndTbl] lost SCSI emulation - burner no work
by gedetil＠cs.umanitoba.ca 08 Jul '02

08 Jul '02

According to millward: > I upgraded from Red Hat 7.2 to 7.3 and lost my SCSI emulation, > so now cdrecord -scanbus can't find any SCSI devices and > I can't use my burner. > fstab has not changed from 7.2 > /etc/rc.d/rc.local has > /sbin/modprobe ide-scsi > /sbin/modprobe sg This should not even be required anymore, but it can't hurt. In any case, if this is the only thing you've got in there to load the drivers, then it's not enough, since at the point rc.local is run, your IDE drives have already been allocated to the IDE driver, so ide-scsi will just ignore them. > I've looked, and there is no ide-scsi in sbin No, it's a kernel module, and would be here... /lib/modules/`uname -r`/scsi/ide-scsi.o > In /etc/modules.conf I've got > append="hdc=ide-scsi" I hope you meant /etc/lilo.conf here... But are you still using LILO to boot your new Linux version, or have you switched to grub? In that case, you'd need to do the equivalent thing on the "kernel" line in /boot/grub/grub.conf, e.g. something like... kernel /boot/vmlinuz-2.4.18-5 ro root=/dev/hda2 hdc=ide-scsi (Your kernel version and root device may vary.) > I've done > chmod 666 /dev/scd0 > chmod 666 /dev/scd1 ( This is just a home machine so > don't have to worry about security) > The burner is the secondary master in the BIOS so hdc looks OK. > Does this mean I'll have to do a dreaded "kernel compilation"? > I've installed the 2.4.18-3 kernel source in /usr/src/ just in case, > but I'm not excited about compiling kernels. Kernel recompilations are rarely ever needed anymore with Red Hat Linux, since most drivers are set up as loadable modules. Don't recompile your kernel unless you really know what you're doing and really need some feature that's not otherwise available, otherwise you may just break other things that are working fine as is. > Is there anything else I can do to get back my scsi emulation > without compiling the kernel ? Absolutely. Try the above, and if that still doesn't work, there may be another approach to loading the ide-scsi driver which will work (similar to the way Red Hat pre-loads other SCSI drivers via ramdisk). -- Gilbert E. Detillieux E-mail: <gedetil(a)cs.umanitoba.ca> Dept. of Computer Science Web: http://www.cs.umanitoba.ca/~gedetil/ University of Manitoba Phone: (204)474-8161 Winnipeg, MB, CANADA R3T 2N2 Fax: (204)474-7609

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lost SCSI emulation - burner no work
by millward 08 Jul '02

08 Jul '02

Did a lsmod and got Module Size Used by sg 32612 0 ( unused ) ide-scsi 9312 0 scsi_mod 103904 2 [ sg ide-scsi ] Duh? What does this mean? It looks to me that I already have SCSI emulation but its not working the way it should for the burner. The burner is the secondary master. For cdrecord dev=0,1,0 used to work before the upgrade. cdrecord -scanbus finds nothing. cat /proc/scsi/scsi attached devices=none Any information would be most appreciated.

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lost SCSI emulation - burner no work
by millward 07 Jul '02

07 Jul '02

I upgraded from Red Hat 7.2 to 7.3 and lost my SCSI emulation, so now cdrecord -scanbus can't find any SCSI devices and I can't use my burner. fstab has not changed from 7.2 /etc/rc.d/rc.local has /sbin/modprobe ide-scsi /sbin/modprobe sg I've looked, and there is no ide-scsi in sbin In /etc/modules.conf I've got append="hdc=ide-scsi" I've done chmod 666 /dev/scd0 chmod 666 /dev/scd1 ( This is just a home machine so don't have to worry about security) The burner is the secondary master in the BIOS so hdc looks OK. Does this mean I'll have to do a dreaded "kernel compilation"? I've installed the 2.4.18-3 kernel source in /usr/src/ just in case, but I'm not excited about compiling kernels. Is there anything else I can do to get back my scsi emulation without compiling the kernel ?

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FTP problems
by S/C Conway 02 Jul '02

02 Jul '02

G'Day, I have been trying for months to connect to a vendors FTP site using my Linux box (RH7.2), with no success. I can connect to the site but when I issue a command (e.g cd or get <filename> I recieve ENTERING PASSIVE MODE (IP ADDRESS) and after some time connection timeout. I know the box at the other end is NT4.0. If I use a windows 98 O/S no problems. Does anyone have some suggestions to analyize the problem? I can use some links to do some reading if you have them. Sean

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