lhotka@incstar.com (06/01/91)
I have an ST251N which was connected to my A500. I got an A3000 and
plugged in the drive. My second partition shows up just fine (after
running the 2.0 HD configure program), but I can't get the first partition
to show up.
I know why - in the HD config program it won't let me specify the first
partition to start at a cylinder lower than 2, but on the 500 in my
mountlist I had it starting at cylinder 0.
Why won't the HD config program let me use cylinders 0-1?? Is there a way
to make this work for me?
I realize that I can just reformat the first partition to the new size, but
my intent is to mount it as is and copy it's contents to the 3000's
internal drive... More importantly, I am wondering why the system appears
to be forcing two cylinders to be basically wasted on the drive.
Thanks!
Rockford Lhotka INCSTAR Corp
Applications Project Leader 1990 Industrial Blvd
lhotka@incstar.com PO Box 285
612/779-1701 Stillwater, MN 55082
>>>Amiga - The computer for the creative mind<<<yurkon@CYCVAX.NSCL.MSU.EDU (06/03/91)
In article <2655.2847ab57@incstar.com>, lhotka@incstar.com writes... >I have an ST251N which was connected to my A500. I got an A3000 and >plugged in the drive. My second partition shows up just fine (after >running the 2.0 HD configure program), but I can't get the first partition >to show up. > >I know why - in the HD config program it won't let me specify the first >partition to start at a cylinder lower than 2, but on the 500 in my >mountlist I had it starting at cylinder 0. > >Why won't the HD config program let me use cylinders 0-1?? Is there a way >to make this work for me? > It thinks it is a bootable partition. I believe that if you change the configuration so that its not bootable it should work. John
rzv30@cccvm.ccc.amdahl.com (Rene' A. Vega) (06/12/91)
Be very careful when configuring your existing external hard drive with the Amiga 3000 HDTools program. The reason you're not allowed to specify a partition beginning at cylinders 0 and 1 is because the configuration program uses those first two cylinders to house the partition map. One of the last things it does is WRITE to those cylinders. Fortunately for me, both of my external hard drives had an expendable partition beginning on cylinder 0, and so it wasn't a disaster that those first two cylinders were overwritten. Rene' A. Vega Computer & Systems Architecture
rzv30@cccvm.ccc.amdahl.com (Rene' A. Vega) (06/12/91)
Many cautions regarding the HDconfig program. It uses cylinders 0 and 1 to house the partition map, which is why a partition cannot be defined to begin at less than cylinder 2. Rene' A. Vega Computer & Systems Architecture
carolyn@cbmvax.commodore.com (Carolyn Scheppner - CATS) (06/14/91)
In article <5bEB02Zw08Nj01@JUTS.ccc.amdahl.com> rzv30@cccvm.ccc.amdahl.com (Rene' A. Vega) writes: >Be very careful when configuring your existing external hard drive with the >Amiga 3000 HDTools program. The reason you're not allowed to specify a >partition beginning at cylinders 0 and 1 is because the configuration program ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ >uses those first two cylinders to house the partition map. One of the last >things it does is WRITE to those cylinders. Fortunately for me, both of my >external hard drives had an expendable partition beginning on cylinder 0, and >so it wasn't a disaster that those first two cylinders were overwritten. I would just like to note that this use of the initial cylinders is not an arbitrary choice made by HDTools. The standard Amiga specification for Rigid Disk Block, which was developed by Commodore-Amiga in conjunction with a number of 3rd party Amiga hard disk controller manufacturers (I believe over two years ago), specifies that partitioning information, softloaded filesystems, bad block maps, and other information be stored in a particular format in the initial cylinders of the drive. (see Amiga RKM Libs and Devs, Expansion Library chapter for more info) This is what makes it possible to move many Amiga harddrives not only between systems but even between different brands of controllers that support Rigid Disk Block, and have all of your partitions come up magically. -- ========================================================================== Carolyn Scheppner -- Tech. Mgr. CATS - Commodore Amiga Technical Support PHONE 215-431-9180 {uunet,rutgers}!cbmvax!carolyn carolyn@commodore.com Pad with zeros for a light, airy program. ==========================================================================