michael wrote: > PJ wrote: >> Why is it that the manual pages, as thorough as they may be, are very, >> very confusing. >> Perhaps I am being too wary, but I find that too many >> instructions/examples are stumbling blocks to appreciation of the whole >> system: >> for instance, let's look at the instructions for changing disk labels >> with glabel or is it tunefs ? >> man glabel(8): >> >> for UFS the file system label is set with >> tunefs(8) >> <http://www.freebsd.org/cgi/man.cgi?query=tunefs&sektion=8&apropos=0&manpath=FreeBSD+7.2-RELEASE>. >> >> what happened to glabel? >> man tunefs(8) >> The *tunefs* utility cannot be >> run on an active file system. To change an active file system, it must >> be downgraded to read-only or unmounted. >> >> So, you have to run tunefs from an active file system to modify another >> disk? >> but from man tunefs: >> BUGS >> This utility should work on active file systems. >> What in hades does this mean--just above it says cannot be run on active >> file systems. ??? >> To change the root file >> system, the system must be rebooted after the file system is tuned. >> >> You can tune a file system, but you cannot tune a fish. >> How cute... And fish eat bugs. >> >> Seriously, now to the manual: >> To create a permanent label for a UFS2 file system without destroying >> any data, issue the following command: >> # tunefs -L /home/ /dev/da3 >> >> Oh? home is what? What does this have to do with the partitions? >> Here's from man glabel(8): >> >> EXAMPLES >> The following example shows how to set up a label for disk ``da2'', cre- >> ate a file system on it, and mount it: >> glabel label -v usr /dev/da2 >> newfs /dev/label/usr >> mount /dev/label/usr /usr >> [...] >> umount /usr >> glabel stop usr >> glabel unload >> >> The next example shows how to set up a label for a UFS file system: >> tunefs -L data /dev/da4s1a >> mount /dev/ufs/data /mnt/data >> >> Am I to understand that glabel is only for a new system? What's with the >> newfs... I'm trying to set labels on an system that is already set up. >> And, the glabel examle above is not for UFS file systems? Oh, that's for >> tunefs? >> So why are we even dealing with this glabel? >> >> from manual: >> # tunefs -L /home/ //dev/da3/ >> A label should now exist in /dev/ufs which may be added to /etc/fstab: >> /dev/ufs/home /home ufs rw 2 2 >> >> Why? Is this necessary? and somewhere I saw "tunefs -L volume >> /dev/da0s1a" or something like that. Does that mean that each partition >> should be tunefsd? Maybe the guys who programmed this stuff understand; >> I sure don't. I just want to be able to set the labels according to what >> they say can be done... so shy not have a clear and concise explanation? >> >> Do people who write this stuff ever read it? Tell me that its clear and >> simple and to the point... so far, I have been running back and forth >> between half a dozen web pages trying to understand what is going >> on... and doing things through a dense fog does not produce creative >> results! >> _______________________________________________ >> firstname.lastname@example.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-questions >> To unsubscribe, send any mail to >> "freebsd-questions-unsubscr...@freebsd.org" >> > ok, in short since i didn't see anyone answer this directly, your > question of tunefs vs glabel: > > tunefs is for UFS: it labels a UFS filesystem, no matter the device, > ie: ad or da. tunefs is part of the filesystem utilities for UFS. > good example, can't tunefs -L SWAP /dev/ad0s1b if it is a swap. you > can glabel it. > > glabel is for labeling a device itself. you can glabel an ntfs > filesystem or ext2, whatever. > > Thanks for that, Michael. But can you explain what this means? It just is not clear for me. "# tu;nefs -L home /dev/da3" This puts a label on that disk? So now it can be referred to as home? da3 = home ?
I'll try to delve into the man glabel further... but things still look murky. _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"