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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
mounting/unmounting scsi

Posted by tommaco (tommaco), 22 December 2006
I'm attempting to create a small GUI using SpecTcl which would simplify mounting and unmounting scsi drives.  Currently I am using the command

exec echo "scsi add-single-device 1 0 1 0" > /proc/scsi/scsi
and
exec echo "scsi remove-single-device 1 0 1 0" > /proc/scsi/scsi

The add part will work like this, but unmounting the drive brings up and error on how the drive does not exist.  The line still works, and will unmount but the error causes the rest of the function to quit out.

I've narrowed it down to exec which I seem forced to use while in tcl.  Any help on this would be greatly appreciated.  

Posted by admin (Graham Ellis), 22 December 2006
You can probably catch the error so that the function doesn't quit. There's an example of catch here



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