OPS raw device backup

[kris123]

Hi Friends,

OS - AIX 4.3.2
DB - 8.1.5 OPS

Our Oracle Consultant have created backup scripts for OPS raw
devices, and i'm trying to study and understand it. We have a large
DB (around 600Gb) so he is compressing the file before transferring
to DLT tapes. A line in the script that backup the raw device looked
this this:

dd if=/dev/rlvlg001p01 bs=4k skip=1 | compress > lg001p01.Z

I understand that "dd" command syntax has "if" for input and "of"
for output. So I assumed that the "of" was substituted by the
"| compress ". Unfortunately, I can't find his scripts for restoring
the backup files. And I was tasked by my boss to check, test
our backup by restoring it to development server.

I tried restoring the files by reverting the command like:

uncompress lg001p01.Z > | dd of=/dev/rlvg001p01 seek=1 bs=4k

but it did not work. Has anybody made similar procedure in
backing up raw devices?

Thanks.

[alenz]

uncompress needs to go to std out. (">" is used to redirect std out, uncompress does not write to std out by default, use -c)

try

uncompress -c lg001p01.Z | dd of=/dev/rlvg001p01 seek=1 bs=4k

Andrew
OCP, EMC

[tamilselvan]

dd command for hot backup is very slow.

BMC's SQLBACKTRACK is really very fast. Buy it, Use it. Your life will be smooth.

Thanks
Tamil

[stmontgo]

try rman, it backups up our 70gb db in 8 minutes to disk, we keeo a copy on disk for 24 hours and then archive it to tape