| Title: | Ask the Storage Architecture Group | 
| Notice: | Check out our web page at http://www-starch.shr.dec.com | 
| Moderator: | SSAG::TERZA N | 
| Created: | Wed Oct 15 1986 | 
| Last Modified: | Fri Jun 06 1997 | 
| Last Successful Update: | Fri Jun 06 1997 | 
| Number of topics: | 6756 | 
| Total number of notes: | 25276 | 
    Can two TZ88N/TZ89N drives be put into one BA356 shelf set up in split
    bus mode so that each TZ tape is connected to a different system?
    
    Customer is setting up a VMS cluster in a 4000 cabinet and space is
    getting to be an issue.
| T.R | Title | User | Personal Name | Date | Lines | 
|---|---|---|---|---|---|
| 6681.1 | HOUNDD::BASSETT | Bill | Mon May 12 1997 15:01 | 22 | |
|     yes....  just make certain that the drives are adjacent (no gap in
    between) when they are the same...  If they are different (TZ89N vs.
    TZ88N/TZ87N) you NEED the gap!!!
    
      5   4   3    2   1   0 		  5   4   3    2   1   0
    +-----------++-----------+		+-----------++-----------+
    | * |   |   || * |   |   |		|   | * |   ||   | * |   |
    | * |   |   || * |   |   |		|   | * |   ||   | * |   |
    | * |   |   || * |   |   |		|   | * |   ||   | * |   |
    +-----------++-----------+		+-----------++-----------+
      Bus B	   Bus A		  Bus A	       Bus B
    
    Front View 				Front View
    TZ87, TZ87N, TZ88N			TZ89N
    Connector location			Connector location
    and what bus drive would be on.	and what bus drive would be on.
    
    Since the BA356 Shelf is split "even/odd," a three slot SBB
    automatically shifts you to the other bus with the like drives.
    [Even slots are always on Bus A, odd on Bus B.]
    
    				Bill
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| 6681.2 | BA35X-ME | JOBURG::HARRIS | Tue May 13 1997 02:22 | 4 | |
|     Remember to order a BA35X-ME jumper (Not provided with the BA356)
    
    Ivan
    
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