On Monday 31 January 2005 13:33, Pedro Fernandes Macedo wrote: > Paul F. Almquist wrote: > >Labeling does introduce a problem: What happens if 2 partitions have the > > same label? Which one does mount choose? I do not know the algorithm > > but I do know that mount does not know which one you want to use. In the > > technical college where I taught Unix/Linux system administration we had > > removable IDE drives in our lab machines. (standard IDE drives in a tray > > that slides into a bay the in cabinet. works good. I use them at home > > too) I had a removable drive bay on my office machine. A couple of times > > I had to make some repairs to corrupted student drives. Since the drives > > are not hot-swappable I would power down my machine, insert the > > student's drive, power up and boot. Their partition labels were the same > > as on my internal IDE drive and as a result would bet mounted instead of > > my partitions. After a couple time of messing with that I changed the > > /etc/fstab file on my system to use device names instead of labels. > > > >fsck also recognizes the labels, probably other disk related commands > > too. > > > >paul > > In such cases , I strongly suggest changing the labels. Here I used to > have FC2 and FC3 test releases (during FC3 test) installed. > The root for FC2 was labeled / , the one for FC3 was labeled fc3/ . And > the same way for other partitions. > Now , if you need to insert another disk with the same labels , you can > always change the root=LABEL=/ part on grub to point to the right device. > This change can be done at boot time (just press "a" on grub screen) and > it probably will fix the issue, since the kernel will know exactly which > partition to use on boot time. That would take care of getting the right root partition but what about the case where, for example, /usr was in a separate partition on each disk with the same labels? Fortunately I rarely had to deal with the problem and since I retired last May I won't likely run into to it again. paul -- Paul F. Almquist paul@xxxxxxxxxxxxx Eau Claire, WI USA
