On Sat, 28 Dec 2002, Michel Lanners wrote: > On 27 Dec, this message from Jessica Blank echoed through cyberspace: > > On Fri, 27 Dec 2002, Michael D. Crawford wrote: > > > >> Could the original drive still be terminated after you have installed the > >> other > >> drives? It is probably worse to have extra termination than to have none > >> at > >> all. Make sure you've got it right. > > > > The original drive was NOT installed at the end of the chain. (The > > original Apple-branded CD-ROM drive was...) So I don't think termination > > would be an issue for this drive, no? > > How did you install two more drives in the 7300? Did you remove the > CDRom?
Yes... > > Anyway, your SCSI chain needs to _physically_ look like this: > > Host--------------------------------------------last device > | | | .....| > Device Device Device Device > > Only the last device must have termination, none of the others must have > (well, the Host does, but that's automatic). > > So, verify your SCSI cabling in the first place. All other devices > except the physically last one (i.e. at the end of the flat cable) need > to have termination switched off. Verify that with the help of the > manufacterer's jumper info. > > Then, you can try to use another drive providing termination, in case > that specific drive has problems with its termination. That means > physically rearranging drives. > > > How do I know if I got it right? I wish there was a "scsidiag" program > > that would say "Your termination sucks, try this; your SCSI IDs have a > > conflict, try this..." > > There is no other way than to open the case and have a look, sorry... > > > The thing that confuses me is thus: There are several termination options > > for the drive I placed at the end of the SCSI chain (read the Web page I > > referred to: http://www.seagate.com/support/disc/scsi/st15150n.html ). I > > do not know which ones are correct. "Terminate power from drive"? > > "Terminate power to SCSI bus"? I know nothing of these things. > > Ah, Seagate. They have a jumper to enable termination: that is putting > 'the plug on the cable'. This 'plug' needs power, and the other jumpers > specify where this power comes from. 'Term power from drive' uses the > driv'es power for this. 'Term power to bus' is independant of the > on-board terminator; it serves to provide termination power to the > reserved wire in the SCSI cable. Thank you. Which one should I use though? > > But, there is something else you need to make sure. > > The error messages you describe _may_ indicate that the filesystems you > created are larger than the actual drive. This can happen when > partitioning with some (older?) versions of mac-fdisk (aka pdisk). > I seriously doubt this. This is on a fresh install of Woody (Debian 3.0). Everyone keeps saying that I have problems with the filesystems. I've re-created the filesystems a billion times. I doubt that is it... Do you know which versions of mac-fdisk had these problems? > Try using badblocks to verify the drives are OK. Or try using 'dd' to > read the entire drive (something like dd if=/dev/sd<x> of=/dev/null > bs=512 count=<number of blocks>). > > If this is your problem, you need to specify the correct drive size when > creating a partition map with mac-fdisk. > > Cheers > > Michel > > ------------------------------------------------------------------------- > Michel Lanners | " Read Philosophy. Study Art. > 23, Rue Paul Henkes | Ask Questions. Make Mistakes. > L-1710 Luxembourg | > email [EMAIL PROTECTED] | > http://www.cpu.lu/~mlan | Learn Always. " > -- J e s s i c a L e a h B l a n k
