Glenn,

Your comments seem to imply you do NOT have a DDS drive in your 957.  Am I
right or wrong ?  If you have one, forget the following and sorry for
bandwidth waste.

If you don't have a DDS drive, then your DLT4000 would be your only tape
device on system once 7980XC removed ?  If so, I would be very careful with
that ?  On which device will you create SLTs and boot system from in case of
ldev 1 failure ?  Also, not all DTL4000 are "made equal".  If you take a
DLT4000 coming from PCs, firmware may not be up to date for HP3000
backups...  As far as I remember, there were some issues with older DLT4000
drives with old firmware versions...
--
=========================================
Denis  (Remove "removeit." from email address)
=========================================
"Glenn Mitchell" <[log in to unmask]> wrote in message
news:bf93b1c2.0304301100.625bf201@posting.google.com...
> My 957 has been humming along running MPE/iX 6.0 for quite some time
> now with little or no help from me :-)  (So my configuration skills
> have gotten somewhat rusty; hence my plea to the list.)
>
> We dropped hardware and software maintenance on the system some while
> back as we continue to expect this system to be phased out "soon" and
> bucks are tight here.  Unfortunately, we've been running into some
> problems with our old 7980XC tape drives.  I think it's time to get
> rid of them (the last HP-IB stuff we've got).  We've got some DLT4000
> tape drives lying around and I'd like to connect one or two to the 957
> and use them for database, incremental, and full backups.
>
> My questions:
>
> Can I simply hook a DLT4000 drive to the SE-SCSI port on the MFIO
> card, set its SCSI address, and add the device as an HPC1521B?  I
> currently have LDEV 1 and the DDS tape on the internal SCSI bus.  Yes,
> I know I'd likely get better performance with the DLT connected to a
> separate SE-SCSI card, but I'd have to buy one and install it.
>
> Are there known problems running ROC RoadRunner 5.0.2 with DLT drives?
>
> I've always taken the system down before fooling with anything on the
> same bus as LDEV 1.  I assume that's still the appropriate thing to
> do?
>
> I'm assuming performance on a DLT4000 will be much better than with a
> basic DDS drive?
>
> Are there other gotchas I need to know about?
>
> TIA.
>
> Glenn Mitchell
> 3GM Associates, Inc
> for Maine Medical Center

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