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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

398.0. "cloning /archive/backup" by BRSADV::BUGGENHOUT () Mon Feb 10 1997 09:12

Hi

we try to support the following and are wondering if this could work :

1. cloning of backup : can this be done at a choosen time or is the
  clone always taken immediatly after the backup ?
  Can cloning be done to another tapedrive connected to another system or
  must the 'clone' tape drive be connected to the same system as the
  'backup' tape drive ?

2. cloning and archive : in fact the same question; we would like to have
  archiving done on 2 optical disks , 1 connected on system1 and 1 connected
  on system2. Or is any other form of replication of the optical disk 
  containing the archive possible ?

3. archive on optical disk : how/what is the difference for NSR of write
   once or write many optical disks ?  Can write many disks be overwritten
   as is done for tapes by putting them recycable ?

Thanks


regina
T.RTitleUserPersonal
Name		DateLines
398.1DECWET::ONOSoftware doesn't break-it comes brokenMon Feb 10 1997 09:5124
>1. cloning of backup : can this be done at a choosen time or is the
>  clone always taken immediatly after the backup ?
>  Can cloning be done to another tapedrive connected to another system or
>  must the 'clone' tape drive be connected to the same system as the
>  'backup' tape drive ?

  You can do either automatic cloning or clone on demand.

  Both devices must be connected to the NetWorker server.  
  NetWorker does not use remote devices.

>2. cloning and archive : in fact the same question; we would like to have
>  archiving done on 2 optical disks , 1 connected on system1 and 1 connected
>  on system2. Or is any other form of replication of the optical disk 
>  containing the archive possible ?

  See above.

>3. archive on optical disk : how/what is the difference for NSR of write
>   once or write many optical disks ?  Can write many disks be overwritten
>   as is done for tapes by putting them recycable ?

  I think NetWorker does not make a distinction between write-once
  and write-many optical disks.
398.2SPD, support, WORM vs WMRM opticalsDECWET::EVANSBe a Point Of Light!Mon Feb 10 1997 10:008
in the SPD, the HP opticals jukeboxes (and the Digital equivalent) are
 supported by NetWorker since they behave like disks... they are random access.
 This allows labelling to be done correctly (eg, in a known spot/sector)

I suspect (but cannot prove) labelling a WORM platter is more like tape,
 since you can only write a sector once.

I know of no WORM drives supported by NetWorker.
398.3DECWET::RWALKERRoger Walker - Media ChangersMon Feb 10 1997 13:3511
	Opticals are access by NetWorker as raw devices, a simple set
	of X bytes in a row.  We haven't been testing with WORM media in 
	the RWZ drives so there could be hidden problem.  Without any
	current demand it hasn't been worth buying the media since it's
	only good for one test.

	For standard R/W media you do the same recycling that would be
	done with tape.  The label function will write a new header to	
	the first of the drive effectively erasing the old data.  If this
	is in a jukebox NetWorker will do this for you automatically
	when the volumes expire and are needed.
398.4Thanks !!BRSADV::BUGGENHOUTTue Feb 11 1997 00:170