restore failed, how come?

Hi, I am trying to restore a backup machine manually, in case the production machine down, I can switch to the backup machine. We run Online 5 on the machines. After a level 0 archive restored, I fed the backup machine with logical log backup tapes daily. But after a while, "tbtape -r" told me "logical logs are fulled." The online log shows: 13:23:14 ERROR: logread() - loguniq 7399 logpos 0x124740 13:23:14 INFORMIX-OnLine Must ABORT Log Error 'logread() - logsearch() FAILED' us 0xca7d6ec0 pid 0 us_flags 0x101 tx 0xca7e40d0 tx_flags 0x86403 tx_loguniq 7399 tx_logpos 0x124740 13:23:14 -- Online Aborting -- us=ca7d6ec0, pid=8074, uid=213 Seems tbtape wanted to read log 7399, but it's gone. 7399 was not in the list produced by "tbstat -l", the oldest one is 7400. It takes me 10 hours to do a test:( Hope any of you can give me a hint. Thsnks. -- Sincerely yours Uen-Jiun OO------------------------------------------------------------+ || \\ NAME : Tzeng, Uen-Jiun '''Ŷv \\ || > e-mail : ujtzeng@csie.nctu.edu.tw > OO------------------------------------------------------------+