8 Dec
2015
8 Dec
'15
9:50 a.m.
Connecting a scsi dlt or dat drive is something i had not considered. I
thought i would have had to buy and use DEC branded tape drives.
I already have a scsi dat and DLT drive in use on my SGI octane. I could
probally write the image with the octane and then move the drive over to
the microvax to install.
Hopefully the DLT drive will be supported. the dat drive i have seems
finicky at it's best.
On Tue, Dec 8, 2015 at 12:44 PM, Mark G. Thomas <Mark at misty.com> wrote:
Hi,
On Mon, Dec 07, 2015 at 02:25:25PM -0500, Christian Gauger-Cosgrove wrote:
I had mixed results with some QBUS SCSI adapters. Some played well
with the AztecMonster and some did not. Oddly, I think my Emulex UC07
was one that did not, but the CQDs and maybe one other model work fine.
On 6 December 2015 at 13:24, Mark G. Thomas
<Mark at misty.com> wrote:
> As much as I love old CPUs, I've lost my patience with hard disk
drives.
> I've been using AztecMonster (search
ebay) CF-SCSI adapters, with
several-GB
> CF cards instead of spinning disks. The
KA660 and several PDP-11/83s
> here run reliably from CF storage. I see now there are SCSI2SD cards
for
half the
price of the AztecMonster CF adapters I've been using. These
might be an alternative, if they play okay with whatever q-bus SCSI
controller you find. Installing from SCSI CDROM and using flash
storage is definitely the way to go if you can get the parts.
That's great news to hear that the AztecMonster works on QBUS PDP-11s.
I now know exactly what my future plans are... But I have a "random" question for
those here. I know some of the QBUS
(and UNIBUS) SCSI controllers can act both as an MSCP and TMSCP
controller. (CMD CQD-220A/TM for one example.) And I know that several
of the PDP-11 operating systems install from tape, and can install
from TMSCP tape (hello RSTS/E). What I'd like to know is: Is there
anything out there that can emulate a SCSI tape device on a CF card/SD
card/USB stick/what-have-you?
So far, I've been using a DLT8000 when I've needed a sequential tape
device,
such as for the BSD2.11 install. It's been convenient to write the tape on
a Linux or Sun box, then plug it into the PDP11. All my older SCSI tape
drives (Exabyte and DAT) have developed problems, but this DLT8000 drive
works great.
Mark
--
Mark G. Thomas (Mark at Misty.com), KC3DRE