Re: Chaining tape drives?

["Mike Shaw" <mshaw@xxxxxxxxxxxxxx>]

Quazy,

 

Its one IOP to one port on the 3590 (There are two ports available on a B11).  The issue is that the SCSI card, in our case a 6501 cannot address more than one device.  We had a couple of 6501 cards from a de-install of EMC disk units a couple of years ago so we have 2 ea, 6501 cards in one AS/400 to connect to two 3590 tape drives. 

 

RS/6000's can have addressable SCSI chains of devices because they use a more sophisticated SCSI adapter card.  They are doing it here as well.  Then there's the mainframe interface to 3590 that is ESCON based which through a protocol converter gets converted back to SCSI........Believe me, there are differences depending on what platform the 3590 is attaching to!  And, they are probably better than what we have on the AS/400 right now!  :-)

 

HTH,

 

Mike Shaw

Senior AS/400 Technical Support

North American Mortgage

Santa Rosa, CA

 

----- Original Message -----

From: Quazy

To: MIDRANGE-L@midrange.com

Sent: Wednesday, March 08, 2000 11:25 AM

Subject: Chaining tape drives?

Can you Chain more than 1 3590 tape drive from one IOP on the as/400?

 

I was told you can't, but we can do it from the RS/6000.  Or is the architecture just to different?