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Conference decwet::networker

Title:NetWorker
Notice:kits - 12-14, problem reporting - 41.*, basics 1-100
Moderator:DECWET::RANDALL.com::lenox
Created:Thu Oct 10 1996
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:750
Total number of notes:3361

363.0. "2 servers sharing the same tape robot" by BRSADV::BUGGENHOUT () Thu Jan 30 1997 02:46

hi

we saw (without details) a configuration proposed by Storagetek and Legato
what made me wondering :

NSR serverA connected to robot TL812 serving a few clients

SAP/UNIX systemB also connected to the same robot


1. could it be that server B is also an NSR server sharing the same robot, i
  never heard about this 
2. perhaps they would just use the robot for backup from within SAp but sharing 
  this robot seams asking for management problems

Any comments ?


regina

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363.1Any comments ? (You bet...)DECWET::EVANSBe a Point Of Light!Thu Jan 30 1997 09:5810
all the typical ones.

 your instincts are correct: 2 servers trying to drive the same robot could
 potentially "drive it crazy". Conflicts will occur (not could, will).

  It would be *very helpful* to get specifics of who, what, when, where:
 which customer, who in Legato, so we might be pro-active on this, if required.

  Who knows, Legato may have something we need to know about so we can do it
 too...
363.2DECWET::ONOSoftware doesn't break-it comes brokenThu Jan 30 1997 10:0014
.1 is correct if you are proposing a typical library with 
relatively unsophisticated robotics.

However, if Legato and STK are proposing one of the ACSLS
(Automated Cartridge Storage Library Subsystem) silos, then this
should work fine. 

The ACSLS has a silo control processor that manages the silo, 
accepts silo commands from multiple hosts, and keeps track of
which cartridges "belong" to which host.

However, Digital doesn't support this.

Wes
363.3DECWET::MORRISThis mind left intentionally blankMon Feb 10 1997 09:132
    If you saw a slide on this, as opposed to actual demonstration, it was
    probably with the use of the OpenVault software proposed from SGI.