RP8400

[dan_156]

I could be missing something, but can I connect a DLT 7000 to the internal LVD card on a RP8400? I can't seem to see the device and wondering what I missed. The ioscan shows:

fiserv (root) [/:]ioscan -fnH 0/0/0/3/1
Class I H/W Path Driver S/W State H/W Type Description
======================================================================
ext_bus 3 0/0/0/3/1 c720 CLAIMED INTERFACE SCSI C896 Fast Wide Di
fferential
target 6 0/0/0/3/1.7 tgt CLAIMED DEVICE
ctl 3 0/0/0/3/1.7.0 sctl CLAIMED DEVICE Initiator
/dev/rscsi/c3t7d0

[Pete Randall · Accepted solution]

Dan,

I think the DLT7000 is HVD(High Voltage Differential) SCSI and your interface is LVD (low Voltage Differential). That won't work.

Pete

[melvyn burnard]

What I/F does the DLT have?
Single Ended. F&W Diff? LVD? HVD?

They may be SCSI, but they are all different ;-]

[Brian M Rawlings]

Dan: one other question... is this the only device on the SCSI bus connected to the built-in SCSI port? Normally, there is also either a DAT or a DVD and DAT attached to this bus.

If you have an SE DLT7000 (rare, but you might), it would actually work on the built-in SCSI bus, since the UltraSCSI LVD ports are dual-mode, and will autodetect and autoswitch into SE mode, if they see an SE device attached. In that case, they'd only work in SE mode, so all devices on the bus would have to be SE.

Most DLT7000s were FWD/HVD SCSI, and, like earlier posters, I would guess that LVD/HVD incompatibility is your problem. But, if you have an LVD or SE DLT7000, and there are any other devices on the bus, pare it down to just the DLT7000, a cable, and a terminator, to troubleshoot.

Later... --bmr

[dan_156]

Great info. I have gotten responses faster here than on the 800 phone line. Still on hold as I write this. I have tried DLT 7000 (differential) one device at a time. I was guessing these built in cards are LVD/SE type. The LVD light goes off when I plug devices in, but don't know what they switch to. Again these are not used and nothing is connected externally on this RP8400. Part of my ioscan looks like this and note that nothing is on the 0/0/0/3/1 card

0/0/0/2/1 ext_bus SCSI C87x Fast Wide Single-Ended
0/0/0/2/1.2 target
0/0/0/2/1.2.0 disk HP DVD-ROM 305
0/0/0/2/1.7 target
0/0/0/2/1.7.0 ctl Initiator
0/0/0/3/0 ext_bus SCSI C896 Fast Wide Single-Ended
0/0/0/3/0.6 target
0/0/0/3/0.6.0 disk HP 36.4GST336752LC
0/0/0/3/0.7 target
0/0/0/3/0.7.0 ctl Initiator
0/0/0/3/1 ext_bus SCSI C896 Fast Wide Differential
0/0/0/3/1.7 target
0/0/0/3/1.7.0 ctl Initiator

[Pete Randall]

And we work for peanuts (points, that is), too!

;^)

Pete

[Brian M Rawlings]

Dan, what exactly is the DLT7000 you are trying to use? Are there any model numbers, part numbers, is it HP? We've seen lots of these, and can probably just tell you 'it should work', or 'no way, Jose'. Is it in an enclosure, or standalone? That could tell us what it is just as well, if you can give us some detail on the enclosure.

Regards, --bmr (peanuts, shmenuts... macadamias at least)

[Brian M Rawlings]

Dan: one other thought, since you state that the LVD LED goes off when you plug in the DLT (get out your TLA reference PDQ, or you'll be SOL, LOL).

I notice that the bus in your latest ioscan shows that it is still in 'fast wide differential' mode, not 'fast wide single ended' mode:

0/0/0/2/1 ext_bus SCSI C896 Fast Wide Single-Ended (for internal SE DVD drive)
...
0/0/0/3/1 ext_bus SCSI C896 Fast Wide Differential (bus with ext. DLT7000 drive)
...

The internal devices are running in SE mode, and so their bus/driver is flipping into SE mode to match.

The 0/0/0/3/1 bus is NOT flipping to SE mode, however, and not running in LVD mode either (even though the driver thinks it's running 'differential'). This pretty much nails it that your DLT7000 is HVD, and the autosense circuitry can't flip to that mode.

Let us know what model and manufacturer the DLT7000 is, and we'll nail this one shut.

If you still want to run this FWD/HVD drive on your RP8400, you will need an HVD-capable SCSI HBA.

The P/N for a single-port FWD/HVD PCI card is A4800A (has the normal HD68 SCSI plug on it).

There is also a dual-port HVD SCSI card, A5159B (or previous A5159A, if you have one in a drawer somewhere). The dual-port card has the mini 'Very High Density (VHD) connectors, like the built-in port does.

Let me also suggest that you get a HD68 HVD terminator, so that particular issue doesn't bedevil you: C2905A.

C2924A is a 2.5m M/M HD68 (both ends) cable you will need need, if you get the A4800A. C2925A is the 10m version, same ends.

For the VHD68-to-HD68 cable on the A5159B or A5159A, use C2365B (2m) or C2368B (5m).

Since the terminator goes on the DLT7000, use C2905A regardless of HBA used.

Best Regards, --bmr

[dan_156]

The DLT 7000s are in a STK Tape Library unit and are quantum type drives. I believe now as well that they are not compatible with the LVD cards. We are trying to get the proper cards now. Thanks to all for the feedback it was very helpful.