To chime in on the paralan comment, we had nothing but trouble with the two that we tried. (HVD in filer to LVD drives/library).

We ended up purchasing an FC-AL tape adapter for our filers and a Chapparal FC-SCSI bridge. We haven't had a problem since. This setup also provides the ability to offline and online the FC-AL adapter. If you need to do maintenance on your library (stuck tape, replace a drive, etc.), it can easily be done with the filer up and without interrupting service.

My .02, Jeff Mery, MCP National Instruments

------------------------------------------------------------------------- "Allow me to extol the virtues of the Net Fairy, and of all the fantastic dorks that make the nice packets go from here to there. Amen." TB - Penny Arcade -------------------------------------------------------------------------

ravi ravi_tiger@rocketmail.com Sent by: owner-toasters@mathworks.com 09/27/2003 11:27 PM

To: Duncan Greenwood duncan.greenwood@btinternet.com, Robert Borowicz rbaus@swbell.net, toasters@mathworks.com cc: Subject: Re: Attaching 4700 to an FAS940

HI Guyz,

You may have to use lvd to hvd converter from paralan. It works. We had the same problem with 940, in which we had to hook up a hvd autoloader to 940. We used paralan because acording to ntap their pci is pci-x and there isnt't any hvd adapters for pci-x.

good luck..and shoot to www.paralan.com...

rgds, rvk --- Duncan Greenwood duncan.greenwood@btinternet.com wrote:

Rob,

Oops - the manual for this library tells me it has a *differential* SCSI interface which I'm almost certain requires an HVD or (old-style) diff adapter on the host. It probably won't work with an LVD adapter in the filer.

Limited specs are in the Sun systems handbook at:

http://sunsolve.sun.com/handbook_pub/Systems/L280/L280.html

and the manual is online at:

http://sunsolve.sun.com/data/805/805-3958/pdf/805-3958-10.pdf

See page 1-2 (p26 of the PDF) which says "SCSI-2 high density wide differential".

The L280 is an oem from HP (model 718) who offered it with either SCSI type, so if you've got a real HP one you might be lucky.

Otherwise you're stuck. I've never had much luck with SCSI converters, but others may disagree. NetApp don't seem to offer a differential adapter according to the parts finder on NOW.

hth

Duncan # ----- Original Message ----- From: Robert Borowicz To: toasters@mathworks.com Sent: Friday, September 26, 2003 11:25 PM Subject: Attaching 4700 to an FAS940

I'm coming in on Sunday to cable two Sun L280 (4700?) DLT 7000 7 tape stackers to my FAS940.

Support told me that the system will probe the SCSI controller and yield the correct device types.

Here's my sysconfig -v output:

slot 8: SCSI Host Adapter 8a (Adaptec AIC7899A) HW Version 0.0 Ultra160 SCSI, Low Voltage Differential slot 8: SCSI Host Adapter 8b (Adaptec AIC7899A) HW Version 0.0 Ultra160 SCSI, Low Voltage Differential

Anything I should know to get these bad boys to work? I'll be configuring them as NDMP devices from my Legato 6.1.3 server next week.

Thanks in advance!

-Rob

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Duncan,

Thanks for the post. It made me double check with Sun on this. One of my Unix admins (since retired) researched putting one of these L280's on his Tru64 Alpha box some time ago. His research came up the the HP version LVD to which I was going on. But after seeing your post and calling Sun, sure enough they verified HVD.... Ick....

So my game plan now is to rewire a dual DLT8000 (Sun L40, yes also OEM'd from HP) routing one of the DLT8000's (LVD I'm pretty damn sure) to the Filer and dedicate it as a NDMP drive. I didn't want to cohabitate NDMP tapes with non-NDMP tapes in the 40 slot stacker but I HAVE to direct attach to the filer or life will get LOOONG here.

I'll migrate the backups formally done by the DLT 8000 to these L280 DLT 7000's attached to a dual processor E3000 I've got sitting around. Hey its the fastest thing I've to that has an Sbus in it. :-\

Thanks for the heads up!

-Rob

Duncan Greenwood wrote:

Rob,

Oops - the manual for this library tells me it has a *differential* SCSI interface which I'm almost certain requires an HVD or (old-style) diff adapter on the host. It probably won't work with an LVD adapter in the filer.

Limited specs are in the Sun systems handbook at: http://sunsolve.sun.com/handbook_pub/Systems/L280/L280.html

and the manual is online at: http://sunsolve.sun.com/data/805/805-3958/pdf/805-3958-10.pdf http://sunsolve.sun.com/handbook_pub/Systems/L280/L280.html

See page 1-2 (p26 of the PDF) which says "SCSI-2 high density wide differential".

The L280 is an oem from HP (model 718) who offered it with either SCSI type, so if you've got a real HP one you might be lucky.

Otherwise you're stuck. I've never had much luck with SCSI converters, but others may disagree. NetApp don't seem to offer a differential adapter according to the parts finder on NOW.

hth

Duncan #

----- Original Message -----
From: Robert Borowicz <mailto:rbaus@swbell.net>
To: toasters@mathworks.com <mailto:toasters@mathworks.com>
Sent: Friday, September 26, 2003 11:25 PM
Subject: Attaching 4700 to an FAS940

I'm coming in on Sunday to cable two Sun L280 (4700?) DLT 7000 7
tape stackers to my FAS940.

Support told me that the system will probe the SCSI controller and
yield the correct device types.

Here's my sysconfig -v output:

slot 8: SCSI Host Adapter 8a (Adaptec AIC7899A)
                HW Version 0.0
                Ultra160 SCSI, Low Voltage Differential
        slot 8: SCSI Host Adapter 8b (Adaptec AIC7899A)
                HW Version 0.0
                Ultra160 SCSI, Low Voltage Differential

Anything I should know to get these bad boys to work? I'll be
configuring them as NDMP devices from my Legato 6.1.3 server next week.

Thanks in advance!

-Rob


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