Re: Raw device questions... OR Tech support says we are wrong

In article <58kgil$22d@ncar.ucar.edu>, Eddie Roberts <nws@stout.atd.ucar.edu> wrote: >I've been following the numerous threads about setting up an Informix >database (v7.20UC2) on a HP workstation (J200 running hpux 10.20) and >was hoping someone has the definitive answer to the question: > > "Do you need to specify an offset into a logical > volume when using the logical volume managers raw > device (ie. rlvolN)?" > > OR > > "Does HP-UX write partition (ie logical volume) information > or disk drive information on the drive that could be destroyed > when using the raw device driver (ie. rlvolN)?" > >HP tech support said absolutely not!! > >Informix tech support said this was dependent on the OS and the way the >OS manages disk drives and partitions. > >Now, I'm a little confused and a lot nervous!!!! The tech support from both >companies said no offset is needed in the raw disk partition when using >the LVM's character device driver under HP-UX 10.20, BUT I've read several >posts where DBAs have destroyed their disks under this scenario. > With HP-UX you do not need to specify an offset when using raw LVM disk partitions. I do this all of the time with Informix, Sybase, and Oracle databases. Listen to what the tech support from each company says. --Chris