Hi all,

we have installed following hard- and software.
Two clustered NetApp Filer FAS960, one Nearstore R200 for disk2disk-backup,
one directly to nearstore R200 connected DLT7000 drive via HP Surestore 4/1
Bridge (FC-SCSI2 Converter) Legato NetWorker Backupserver is an Windows 2000
System with NetWorker Version 7.2.1 .
ONTAP release for host filer and R200 is V7.0.2R1 .
In future we will serve up to 4 drives for NDMP backup.

+----------+           +-----------+             +---------------------+
|  FAS960  |  <------> |  FAS960   | ----------> |      R200           |
+----------+   Cluster +-----------+  snapvault  +---------+-----------+
                                                           | (via FC/SCSI2)
                                                           v
                                                       +---------+
                                                       | DLT7000 |
                                                       +---------+

For example, on R200 is an volume /vol/v1001 . This Volume has an qtree
/lv1001 . This volume is the same volume an on one host filer. On the host
filer this volume has an snap sched of 
'Volume v1001: 4 31 8@8,10,12,14,16,18,20'.

On R200 this volume will be snapvaulted with the schedule of
create v1001  0@-
xfer   v1001 sv_v1001 62@mon-sun@21

and the snap list for this volume on R200 looks like:
Volume v1001
working...

  %/used       %/total  date          name
----------  ----------  ------------  --------
  6% ( 6%)    0% ( 0%)  Feb 14 22:05  sv_v1001.0
  6% ( 1%)    0% ( 0%)  Feb 14 22:05  hbg1n005(0050417737)_v1001-base.0 (busy,
snapmirror)
 12% ( 6%)    0% ( 0%)  Feb 13 22:05  sv_v1001.1
 16% ( 6%)    0% ( 0%)  Feb 12 22:05  sv_v1001.2
 20% ( 6%)    0% ( 0%)  Feb 11 22:05  sv_v1001.3
 24% ( 6%)    0% ( 0%)  Feb 10 22:05  sv_v1001.4
 28% ( 6%)    0% ( 0%)  Feb 09 22:05  sv_v1001.5
 31% ( 6%)    0% ( 0%)  Feb 08 22:05  sv_v1001.6
 34% ( 6%)    0% ( 0%)  Feb 07 22:05  sv_v1001.7
 37% ( 6%)    0% ( 0%)  Feb 06 22:05  sv_v1001.8

-------------------------------------------------------------------------

Now my question:
----------------
Collegues who make backups via HP dataprotector from NetApp R200 do this way:
1.  rename all two weeks schedule sv_v1001.0 to backup.0
2.  make a fullbackup of this snapshot
3.  delete the renamed snapshot
In this case they use a savesetname of /vol/v1001/.snapshot/backup.0

Our Legato supporter prefers backups by the following way:
1.  NW-Client is the R200, backup-type NDMP
2.  saveset: /vol/v1001
3.  make a fullbackup every weekend and differential backups between weekends

We want to keep weekend data for 1 Year offline. The snapvaulted data we wants
to hold 8 weeks online on R200.

Which is the best way (volume or snapshot backup) backing up the snapvaulted
backup-data from nearstore R200 and when (all weekend or every 8 weekends)
should we backup to tape ?

-------------------------------------------------------------------------

Other backups, e.g. windows backup, with a lot of data we backup with the
following schedule:

dow   S S M T W T F S S M T W T F S S M T W T F S S M T W T F S S
#     1.            2.            3.            4.            1.
lvl   f s 5 5 5 5 5 3 s 5 5 5 5 5 3 s 5 5 5 5 5 3 s 5 5 5 5 5 f s



with kind regards, mit freundlichen Gruessen,  met vriendelijke groet

Rainer Wagner
Systemmanager, Philips Semiconductors GmbH   ICT-SSC DACH

Stresemannallee 101,  22529 Hamburg, Germany
Tel: +49 (0)40 5613-2365,  Fax: +49 (0)40 5613-6-2365
Email: rainer.wagner AT philips DOT com   http:\\www.philips.de\semiconductors

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