Quantum 105S Specs
8 messages in this thread
George,
I looked the drive up today…it's a "zoned" drive, that is on some
tracks…it has 26 sectors per track, on other tracks, it has 36.
It does have 6 heads.
Larry Glamb left you a configuration that should work:
6 heads
20 sectors per track
1708 cylinders (numbered 0 thru 1707)
Again, the exact configuration doesn't matter, only the number of
total sectors. However ALL partitions MUST show the same numbers for their
configuration…the only difference would be the starting and ending
cylinder numbers. If you don't do that, you'll end up with overlapping
partitions and eventuall you will run into problems.
Don
Don, thanks for the information. I am work but I will try it as soon as I
get home this evening. This has really been a learning excercise. I
understand that the number of total sectors it what's important for a SCSI.
One question though, in reading through the information on the A2090a about
adding a SCSI drive, it mentions PREPing the drive then formating the
drive. The PREPing is done on a partition of tracks 0 and 1 (I called it
RES2:). Then the remaining tracks (2 through 1707) are formated as a
different partition (DH2:). Is this correct?
George
George,
PREP will ask you how many cylinders for the default filesystem
(dh2:). I always make that partition as small as possible (1 cylinder)
because it has to be the old filesystem (not FFS). I then create a
mountlist for the rest of the drive under the fast file system and mount it
during my startup.
Don
Don, when you say default file system, is that beyond the first two tracks
of the drive which if I understand correctly are needed by amigados? In
other words, I set up a partition RES2: on the first two tracks and mount
this and then do a PREP RES2: to input the information about the hard disk.
I then have a separate partition called DH2: in the mountlist which I
didn't realize could not be formatted with FFS. Are RES2: and DH2: suppose
to be the same partition or do they need to be different? I hope I am
clear.
George
George:
This gets confusing. RES2: (SCSI address 0) is not a 'real' partition.
It is A) the location of the 'hardblocks' that tell the controller what the
drive is at boot time, and B) tells prep the location (SCSI address) of the
drive. The partition prep asks you about will be auto-mounted at boot. If
you have an A2090A (you poor guy!), this partition MUST be OFS, as the fast
file system isn't available till Dos is alive, and that happens MUCH later
in the sequence. Also, the name the drive gets is fixed, IE, if you have 2
drives, the auto-mount partitions are DH0: and DH1:, and you can't do
anything about it. I got screwed on this, as I named my second partition
DH1: on my original disk (most utilities don't know from FH1:) when I put a
second drive on, my partition vanished! (Actually, failed to mount) I ended
up with 2 different mount lists, depending on if I have the second drive
connected . (It isn't, most times) YUCK!
Dave, thanks for your explanation. This is beginning to make sense. By
the way, with everyones help I have managed to format and partition my
drive and modify my startup sequence to mount the partitions. This has
taught me a LOT about hard drives!
George
George,
RES2: is ONLY used once, during PREP. After preping, (and yes, it
[res2:] should be 2 cylinders long), it is not necessary to mount it again.
What res2: is used for is so on boot up, the system knows you
drive's configuration, bad blocks, and the size of the auto-mount partition
(dh2:). However, since the automount partition (at least currently) MUST
be the old filesystem, I make it as small as possible, 1 cylinder long.
During PREP, it will ask you to give it some information about that
first partition (actually 2nd…since res2: is the first) that it is going
to create as the automount partition. The answers I give are 1 buffer, and
last cylinder of 2.
I then create a mountlist for cylinders 3 thru the last cylinder on
the drive as a fast file system drive.
res2: is not a filesystem, it's a configuration storage area only.
Make sense?
Don
Don, thanks. Yeah! It does make sense. I have the drive formated,
partitioned and the partitions mounted. I followed your example and kept
DH2: at only one cylinder. Again, thanks.
George