raw device

[djaouida]

Hi everyone,

I am trying to convert adatafile from a raw device to a Unix filesystem. I
began with a test on aplateform having the same verions of OS and DB as my
production DB.
I used the dd command
dd if=<my inpout raw device> of=<my output datafile> bs=4096iseek=16
count=12801
db_block_size for our DB is 4K
The file has been copiedsuccessfully but when I try to bring the associated
tablespace online (afterrenamed the file), I am having this errors :
ORA-01122: database file 5 failed verificationcheck
ORA-01110: data file 5: '/prod7/law7/DB2ux2fsc/convert01.dbf'
ORA-01251:Unknown File Header Version read for file number 5

Thank you
Djaouida

[rcaballe]

Extracted from Note 23037.1
6.0 How to convert file systems to raw partitions the only supported way.

The following is the only supported way to convert an instance from a
file system to use raw partitions:

i. Export the tablespace

ii. Recreate them on raw device

iii. Import the tablespace

Sorry!

[djaouida]

Thanks for your reply, but I need to convert From Raw device to Filesystem, not the opposite,
Thank you

[bberg@rtnyc.com]

If you used Vertias file system for Oracle you could have implemented a Veritas format, allowingyou to turn the DBF into a raw space.

this might have helped.

[pwoneill]

Can't you do it the same way? Export everything in the tablespace on the raw device, re-create the tablespace to a file, and import? I'll admit I have no raw device experience but that seems like it should work.