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Can't restore ASE log

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I have ASE backup every day and log backup every hour. then I get the backup file like:

....

-rw-r--r--  1 sybase sybase 5332286485 Apr 12 20:31 mydb.dmp

-rw-r--r--  1 sybase sybase      18048 Apr 12 21:01 my_log_20140412_02.dmp

-rw-r--r--  1 sybase sybase     229836 Apr 12 22:01 my_log_20140412_03.dmp

-rw-r--r--  1 sybase sybase     173399 Apr 12 23:01 my_log_20140412_04.dmp

-rw-r--r--  1 sybase sybase     408999 Apr 13 00:01 my_log_20140412_05.dmp

.....

 

then I try to restore it on another box. firstly, restore mydb.dmp and it is fine with message:

Backup Server: 3.42.1.1: LOAD is complete (database mydb).

Caution:  You have set up this database to include space on disk 19 for both

data and the transaction log.  This can make recovery impossible if that disk

fails.

Caution:  You have set up this database to include space on disk 20 for both

data and the transaction log.  This can make recovery impossible if that disk

fails.

Started estimating recovery log boundaries for database 'mydb'.

Database 'mydb', checkpoint=(11742880, 11), first=(115975859872, 11),

last=(11742913, 5).

Completed estimating recovery log boundaries for database 'mydb'.

Started ANALYSIS pass for database 'mydb'.

Completed ANALYSIS pass for database 'mydb'.

Started REDO pass for database 'mydb'. The total number of log records to

process is 471.

Redo pass of recovery has processed 30 committed and 5 aborted transactions.

Completed REDO pass for database 'mydb'.

Use the ONLINE DATABASE command to bring this database online; SQL Server will

not bring it online automatically.

 

then I try to restore next log backup my_log_20140412_02.dmp and got message:

 

Backup Server session id is:  23.  Use this value when executing the

'sp_volchanged' system stored procedure after fulfilling any volume change

request from the Backup Server.

Backup Server: 4.132.1.1: Attempting to open byte stream device:

'compress::1::/home/mydump/my_log_20140412_02.dmp::00'

Backup Server: 6.28.1.1: Dumpfile name 'mydb14102135A2' section number 1

mounted on byte stream

'compress::1::/home/mydump/my_log_20140412_02.dmp::00'

Msg 4305, Level 16, State 1:

Server 'MYSYB', Line 1:

Specified file 'dump device' is out of sequence. Current time stamp is Apr 12

2014  6:01:01:433PM while dump was from Apr 12 2014  9:19:54:890PM.

 

Not sure why. It said out of sequence. but  the backup sequence is right. after mydb.dmp, the next backup is my_log_20140412_02.dmp. why have this error? how to resolve it?


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