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Verifying a Storage Checkpoint using the command line

After creating a Storage Checkpoint and before using it to back up or restore a database, you can verify that the Storage Checkpoint is free of errors.

See Creating Storage Checkpoints using dbed_ckptcreate

See Mounting Storage Checkpoints using dbed_ckptmount

 To verify that a Storage Checkpoint is error-free using the command line

1. Create and mount a Storage Checkpoint:

   $ /opt/VRTS/bin/dbed_ckptcreate -S PROD -H /oracle/product \

   -o online

   Storage Checkpoint Checkpoint_903937870 created.

   $ mkdir /tmp/ckpt_ro

   $ /opt/VRTS/bin/dbed_ckptmount -S PROD -c Checkpoint_903937870 \

   -m /tmp/ckpt_ro

   If the specified mount point directory does not exist, then dbed_ckptmount creates it before mounting the Storage Checkpoint, as long as the Oracle DBA user has permission to create it.

2. Examine the contents of the Storage Checkpoint:

   $ ls -l /tmp/ckpt_ro/dbvol_82/dbinst1

   drwxr-xr-x 3 oracle dba 1024 Nov 11 2000 .

   drwxr-xr-x 3 oracle dba 512 Nov 16 11:00 ..

   -rw-r--r-- 1 oracle dba 209747968 Nov 16 10:58 .tstmp

   -rw-r--r-- 1 oracle dba 209747968 Nov 16 10:58 .tstab

   lrwxrwxrwx 1 oracle dba 18 Nov 11 2000 tstmp ->
   .tstmp::cdev:vxfs:

   lrwxrwxrwx 1 oracle dba 18 Nov 11 2000 tstab ->
   .tstab::cdev:vxfs:

3. Run dbv tool against Quick I/O file tstmp:

   $ dbv file=/tmp/ckpt_ro/db01/tstmp

   DBVERIFY: Release 9.2.0.2.0 - Production on Mon Mar 7 11:48:35 \

   2005

Storage Checkpoints can only be used to restore from logical errors (for example, a human error). Because all the data blocks are on the same physical device, Storage Checkpoints cannot be used to restore files due to a media failure. A media failure requires a database restore from a tape backup or a copy of the database files kept on a separate medium. The combination of data redundancy (disk mirroring) and Storage Checkpoints is recommended for highly critical data to protect them from both physical media failure and logical errors.