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тАО05-23-2003 05:32 AM
тАО05-23-2003 05:32 AM
I have following problem, I need to backup oracle raw devices using dd.
Like dd if=/dev/vgxxx/rlxxx of=/fs/file.
I don`t know how many blocks on HP-UX raw device must I skip to succesfull backup.
Thanks for advice.
Regards.
Solved! Go to Solution.
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тАО05-23-2003 05:52 AM
тАО05-23-2003 05:52 AM
Solutiondd if=/dev/vgXX/rlvolYY of=/dev/rmt/0m
So if you need to recover you just do the reverse.
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тАО05-23-2003 06:00 AM
тАО05-23-2003 06:00 AM
Re: How to backup oracle raw devices using dd on HP-UX
If you are backing up to tape (or anything else for that matter) I would use a fairly large block size (e.g. bs=1024k).
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тАО05-23-2003 06:08 AM
тАО05-23-2003 06:08 AM
Re: How to backup oracle raw devices using dd on HP-UX
512 bytes is the default raw block size and if 'dd' is the only process on /dev/vg##/rlvol# when you're backing up (* and it should be *) then go really big like bs=5120k.
dd if=/dev/vg##/rvol# of=... bs=5120k
Use factors of 512 for other block sizes.
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тАО05-23-2003 06:30 AM
тАО05-23-2003 06:30 AM
Re: How to backup oracle raw devices using dd on HP-UX
Best regards
Frantisek
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тАО05-28-2003 01:56 AM
тАО05-28-2003 01:56 AM
Re: How to backup oracle raw devices using dd on HP-UX
dd if=/dev/dsk/c1t15d0 of=/dev/c5t1d0 bs=8192
or simply dd to tape.