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file on tape
Hi,
I use the following commands on Solairs to backup my Oracle db file to tape: mt -t /dev/rmt/0 rew exp ..... file= /dev/rmt/0n Q1: how can I copy this file back onto my disk? (ufsrestore doesn't work) Q2: I found that /dev/rmt/0n is linked to /devices/ssm@0,0/pci@1d,600000/pci@1/SUNW,isptwo@4/st04,0:n and the size of that file shows 33279. This filesize seems too small for my database file. So what does this number mean? (btw, I got the number 33279 by ls -l /devices/ssm@0,0.......) Thanks. James. |
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Its not clear to with backup command you are using.
When you want to restore with `ufsrestore` you need to make your backup with `ufsdump` The file you mentiond in Q2 is NOT the database file, it is just the tape device. `mt -t /dev/rmt/0 rew` is just doing a rewind of your tape. `exp ..... file= /dev/rmt/0n ` I do not know what you mean with this. Hereby the man page of ufsdump/ufsrestore http://docs.sun.com/db/doc/805-3727/...ufsdump&a=view |
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Sorry that my wording 'backup' was misleading.
My ex-co-worker extracted some data in an Oracle database by using the Oracle "exp" utility and directly write data onto the tape device(hence the command exp ....... file=/dev/rmt/0n ....). by looking at the script I thought the data would be stored in the filename /dev/rmt/0n, which is the same as the tape device, so I try 'cp' it but it didn't work. Is there a default filename for data stored on the tape device? I want to copy the file back to a disk to I can ftp it to somewhere else. Also, I did a 'ls -l /dev/rmt/0n' and it showed a link to /devices/ssm@0,0/pci@1d,600000/pci@1/SUNW,isptwo@4/st04,0:n and then I did a 'ls -l ' on the file and it showed 33279 as the filesize. Does this number represent how much data that is currently stored on the tape device? Thanks. |
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Try dd
Hi,
You can use the `dd` command to read blocks from tape to disk. hereby the SUN manpage of dd http://docs.sun.com/db/doc/806-0625/...kv?q=dd&a=view |
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