|
View previous topic :: View next topic
|
| Author |
Message |
deepak.kec
New User
Joined: 26 Feb 2007
Posts: 71
Location: bangalore
|
|
|
|
| Once the dataset is deleted --- Can they be recovered again? How? |
|
| Back to top |
|
 |
expat
Global Moderator
Joined: 14 Mar 2007
Posts: 8797
Location: Welsh Wales
|
|
|
|
Only if a backup exists.
The recovery method is dependant entirely on the backup method used. |
|
| Back to top |
|
|
dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
|
|
|
|
Hello,
If you talk with your sdtorage management people, they can tell yo if there is a backup and how to retrieve it. |
|
| Back to top |
|
|
Ranjanapai
New User
Joined: 21 Mar 2007
Posts: 3
Location: India
|
|
|
|
| Try giving HRECOVER command followed by th data set name in ispf screen. if the back up is not available, the recovery process will b failed. this command works if u try this immediately with in a day after deleting the dataset. |
|
| Back to top |
|
|
dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
|
|
|
|
Hello,
This works only if the file has been backed up. . . The best hope is that the file was created long enough ago that it made it to the volume backups (if the site does volume backups).
The amount of time since deletion will not make a difference. |
|
| Back to top |
|
|
expat
Global Moderator
Joined: 14 Mar 2007
Posts: 8797
Location: Welsh Wales
|
|
|
|
The volume dumps can be funny little critters ...... if they are specifically offsite dumps, then they are usually defined as not eligible for dataset restore. If the dataset is on one of these dump volumes and the dump was processed by HSM with DFdss specified as the default datamover, then you could feed the dump volume(s) into a DFdss job to recover it. You might have to get the tapes brought back onsite first though.
| Quote: |
| The amount of time since deletion will not make a difference. |
That depends on how frequently the storage people process the EXPIREBV function of HSM, or if your shop uses another ILM software how the backup retention is defined. |
|
| Back to top |
|
|
dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
|
|
|
|
Hello,
My bad - the intended point was that a recent deletion is not related to recurring backups (actually what i might also have added was that if the file was new, and had not yet been backed up, there may be no way to get it back).
As far as restore eligible, i've not yet had a dataset that was on backup media that could not be gotten back - might take a bit of work, but was always retrievable.
Indeed, would a backup that could not be recovered be a write-only file?
As a complete aside, i was in a meeting once where several (senior corporate manager) folks voiced their concern that a particular bit of data was extremely needing of protection. A good friend suggested that it be put in a write-only file that could not be re-read. A few of the "big suits" took the bait and the meeting degraded from there when realization struck that they'd been had. . .  |
|
| Back to top |
|
|
expat
Global Moderator
Joined: 14 Mar 2007
Posts: 8797
Location: Welsh Wales
|
|
|
|
| Quote: |
| As far as restore eligible, i've not yet had a dataset that was on backup media that could not be gotten back - might take a bit of work, but was always retrievable. |
Yes, that was the point I was making. The reason that offsite dump volumes are marked as not eligible for dataset restore is that otherwise HSM would attempt to use them if a dataset restore was required for a dataset on those dump volumes.
Of course the easiest way would be for the tapes to be brought back onsite, the storage people change the dump class definition to eligable and then run the restore. |
|
| Back to top |
|
|
|
|
