David,
Of course the one big problem with this approach is you no longer have
the "data" onsite if you need to do a recovery. I have not heard of
this approach before. The more common method is to have an onsite and
an offsite tape pool and use backup stgpool to update the offsite copy.
This gives us two completely independant copies of the same data, and
either pool (or individual) tapes can be regenerated if required.
DRM is brilliant for managing all the tape movements, and when starting
from scratch like we just have, it has saved a lot of headaches, even
if it is over priced (for what it is)!
Cheers,
Simon
----------
| From: ADSM-L AT VM.MARIST DOT EDU; david AT BGUMAIL.BGU.AC DOT IL
| From: ADSM-L AT VM.MARIST DOT EDU; david AT BGUMAIL.BGU.AC DOT IL
| To: ADSM-L AT VM.MARIST DOT EDU
| Subject: Re: ADSM OFFSITE media data
| Date: Wednesday, 22 July, 1998 10:09PM
|
| Hi Gary,
|
| We are using "move data" to store only a few tapes on offsite.
|
| Suppose X0001 is in the safe. I am running my backup to X0002.
|
| a. I bring in X0001 from the safe, change access mode to "readwrite"
|
| b. I run "move data X0002". This will copy all material from X0002
| to X0001.
|
| c. I change the access for X0001 to "offsite"
|
| d. X0002 will be empty now, and used for next copy backups.
|
| Of course the same method can be used to bring in any number of backup
| tapes from the safe, "move data" to other tapes, and reuse the
| tapes.
|
| David
| ------------------------------------------------------------------------
| internet: david AT bgumail.bgu.ac DOT il __o David de Leeuw
| phone: +972-7-6 403 124 _`\<,_ Head, Medical Computing Unit
| phone BGU: 62-3124 Soroka: 3124 (_)/ (_) Ben Gurion Univ. of the Negev
| fax: +972-7-6 277 342 POB 653 Beer Sheva Israel
| ------------------------------------------------------------------------
| save the environment and your health: re- and bi- cycle !
| ------------------------------------------------------------------------
|
|
| On Wed, 22 Jul 1998, Gary Harrison wrote:
|
| > I have ADSM V3.1.01 set up to run a copy of my main tape storage
| > pool to a Copy storage pool on a daily basis. This is then set as
| > ACCESS=OFFSITE and taken to our remote safe.
| >
| > When I run Q VOL against these offsite tapes, I notice that some
| > tapes are 0.8% utilised.
| > My understanding of the way ADSM manages these tapes is that at
| > some point it should recopy the data on these tapes and set the
| > tapes as Empty and ready to return.
| > Is there some parameter which decides at what point these files are
| > copied and the tapes Freed ?
| > Is it based on percentage of tape used or on the number of files on
| > the tapes ?
| >
| >
| > NB. I am not using DRM and would like to avoid it if at all possible
| > !
| >
| >
| >
| > Gary Harrison
| > Gary.Harrison AT Arcadiagroup.co DOT uk
| >
|
|
