How to recover data and log

Hello, everyone
I re-installed my windows XP due to virus with the maxdb data and log files left. After that I reinstalled maxdb 7.6 again. How can I recover the db with the existed data and log ? I did not backup the db. I can not figure out a way. Please help me.
Chu

Hi Chu,
creating a MaxDB instance from the data- and logvolumes is not difficult, but some requirements have to be fullfilled:
- you still have the parameter file left
- you still know the password of the database manager operator (DBM in OpenSource or CONTROL for SAP instances)
That given, all you've to do is to re-register the database, via the db_create command:
dbmcli -R "
So, let's go for an example.
I've a database called DB77, the dbm operator is called control, password is also control.
I'll drop the database but keep the files (just like you have it ... hopefully) and re-register the database afterwards:
>dbmcli db_enum
OK
DB77    C:sapdbdb77db                        7.7.02.16       fast    offline
DB77    C:sapdbdb77db                        7.7.02.16       slow    offline
>dir c:sapdbdataconfig
Datenträger in Laufwerk C: ist Boot
Volumeseriennummer: 08C7-EC59
Verzeichnis von c:sapdbdataconfig
24.03.2008 13:37    <DIR>          .
24.03.2008 13:37    <DIR>          ..
25.10.2007 14:11            12.739 .M770216
25.10.2007 14:11            97.900 .M770216.pah
25.10.2007 14:11             1.536 .M770216.upc
14.02.2008 02:21            20.579 .M770323
14.02.2008 02:21           201.850 .M770323.pah
14.02.2008 02:21             1.536 .M770323.upc
14.03.2008 02:23            20.795 .UMDB
14.02.2008 02:24            20.795 .UMDB.01
25.10.2007 14:24            20.795 .UMDB.02
14.03.2008 02:23                26 .UMDB.cfg
14.02.2008 02:24           207.625 .UMDB.pah
25.10.2007 14:24             2.048 .UMDB.upc
14.03.2008 09:23            13.405 DB77
13.03.2008 23:51            13.405 DB77.01
11.03.2008 20:10            13.405 DB77.02
14.02.2008 02:21            13.405 DB77.03
14.02.2008 02:17            13.405 DB77.04
24.01.2008 19:06            13.405 DB77.05
11.01.2008 18:57            13.405 DB77.06
31.12.2007 01:40            13.405 DB77.07
26.12.2007 14:40            13.404 DB77.08
26.12.2007 14:20            13.181 DB77.09
26.12.2007 14:01            13.181 DB77.10
14.03.2008 09:23                75 DB77.cfg
02.12.2007 18:24               648 DB77.mmm
11.03.2008 20:16           343.475 DB77.pah
24.03.2008 13:37             2.048 DB77.upc
14.02.2008 02:20    <DIR>          install
              27 Datei(en)      1.101.476 Bytes
               3 Verzeichnis(se), 20.064.083.968 Bytes frei
Ok, the database is currently correctly registered and the parameter file is present. Now let's drop the database:
>dbmcli -d db77 -u control,control db_drop withoutfiles
OK
>dir c:sapdbdataconfig
Datenträger in Laufwerk C: ist Boot
Volumeseriennummer: 08C7-EC59
Verzeichnis von c:sapdbdataconfig
24.03.2008 13:37    <DIR>          .
24.03.2008 13:37    <DIR>          ..
25.10.2007 14:11            12.739 .M770216
25.10.2007 14:11            97.900 .M770216.pah
25.10.2007 14:11             1.536 .M770216.upc
14.02.2008 02:21            20.579 .M770323
14.02.2008 02:21           201.850 .M770323.pah
14.02.2008 02:21             1.536 .M770323.upc
14.03.2008 02:23            20.795 .UMDB
14.02.2008 02:24            20.795 .UMDB.01
25.10.2007 14:24            20.795 .UMDB.02
14.03.2008 02:23                26 .UMDB.cfg
14.02.2008 02:24           207.625 .UMDB.pah
25.10.2007 14:24             2.048 .UMDB.upc
14.03.2008 09:23            13.405 DB77
13.03.2008 23:51            13.405 DB77.01
11.03.2008 20:10            13.405 DB77.02
14.02.2008 02:21            13.405 DB77.03
14.02.2008 02:17            13.405 DB77.04
24.01.2008 19:06            13.405 DB77.05
11.01.2008 18:57            13.405 DB77.06
31.12.2007 01:40            13.405 DB77.07
26.12.2007 14:40            13.404 DB77.08
26.12.2007 14:20            13.181 DB77.09
26.12.2007 14:01            13.181 DB77.10
14.03.2008 09:23                75 DB77.cfg
02.12.2007 18:24               648 DB77.mmm
11.03.2008 20:16           343.475 DB77.pah
24.03.2008 13:37             2.048 DB77.upc
14.02.2008 02:20    <DIR>          install
              27 Datei(en)      1.101.476 Bytes
               3 Verzeichnis(se), 20.064.083.968 Bytes frei
>dbmcli db_enum
OK
As we see, the database is gone - but due to the withoutfiles flag all files are left in place. Therefore we can reregister the database rightaway:
>dbmcli -R C:sapdbdb77db db_create DB77 control,control
OK
>dbmcli db_enum
OK
DB77    C:sapdbdb77db                        7.7.02.16       fast    offline
DB77    C:sapdbdb77db                        7.7.02.16       slow    offline
>dir c:sapdbdataconfig
Datenträger in Laufwerk C: ist Boot
Volumeseriennummer: 08C7-EC59
Verzeichnis von c:sapdbdataconfig
24.03.2008 13:42    <DIR>          .
24.03.2008 13:42    <DIR>          ..
25.10.2007 14:11            12.739 .M770216
25.10.2007 14:11            97.900 .M770216.pah
25.10.2007 14:11             1.536 .M770216.upc
14.02.2008 02:21            20.579 .M770323
14.02.2008 02:21           201.850 .M770323.pah
14.02.2008 02:21             1.536 .M770323.upc
14.03.2008 02:23            20.795 .UMDB
14.02.2008 02:24            20.795 .UMDB.01
25.10.2007 14:24            20.795 .UMDB.02
14.03.2008 02:23                26 .UMDB.cfg
14.02.2008 02:24           207.625 .UMDB.pah
25.10.2007 14:24             2.048 .UMDB.upc
14.03.2008 09:23            13.405 DB77
13.03.2008 23:51            13.405 DB77.01
11.03.2008 20:10            13.405 DB77.02
14.02.2008 02:21            13.405 DB77.03
14.02.2008 02:17            13.405 DB77.04
24.01.2008 19:06            13.405 DB77.05
11.01.2008 18:57            13.405 DB77.06
31.12.2007 01:40            13.405 DB77.07
26.12.2007 14:40            13.404 DB77.08
26.12.2007 14:20            13.181 DB77.09
26.12.2007 14:01            13.181 DB77.10
14.03.2008 09:23                75 DB77.cfg
02.12.2007 18:24               648 DB77.mmm
11.03.2008 20:16           343.475 DB77.pah
24.03.2008 13:42             2.048 DB77.upc
14.02.2008 02:20    <DIR>          install
              27 Datei(en)      1.101.476 Bytes
               3 Verzeichnis(se), 20.064.083.968 Bytes frei
>dbmcli -d db77 -u control,control db_online
OK
Database reregistered, all files are OK, database online. We're done.
Anyhow, you should in any case perform a backup before you reinstall your machine the next time. I don't know if you've still got all the files I mentioned, but if not - it's not possible to get your database back easily - if at all.
Hope that helps,
Lars

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