Help with Informix mirror problem??

I am running Online 5.01 on an HP9000/735 with HPUX 9.01. I have two dbspaces, rootdbs and dbspace1, mirrored using Informix mirroring. I am using a RAID in independent mode, four mechs as two primary chunks and two mirror chunks. Like this: rootdbs devices chunk1 and mirror1, each one RAID mech. dbspace1 devices chunk2 and mirror2, each one RAID mech. The computer crashed while I was on vacation, a hard crash. We had corrupt data on the root filesystem. The Unix sysadmins thought one of the RAID mechs (chunk2) was bad, so they replaced it. Actually the problem was the root disk, a F/W SCSI disk. Eventually they got it going and data restored where necessary to the filesystems. This is a development system, so my cohorts decided to leave Online offline until I got back (thanks!). I got back, brought Online up. It knew about the tables in dbspace1, since it could read the system tables fine, but was not able to read data from dbspace1, and gave me the following error: SYSTEM error number -135. ISAM error: tblspace does not exist I tried marking chunk2 down, and then recovering it. No go. I tried dropping dbspace1, and it wouldn't let me ("bad isam file format"). I found my friendly Unix sysadmin and he rummaged around until he found the original mech, put it back in the RAID, and all was well. Before turning on Informix mirroring, we tested this scenario thoroughly (we thought). Marked chunks down, recovered them, turned off mechs, on, etc etc, with no problems. Needless to say, this has made me very nervous. What if a production RAID mech fails and Online won't read from the mirror? WHY wouldn't it read from the mirror in this case? Does anyone have any ideas? Thanks, --Joan joana@vcd.hp.com -- ............................................................. Joan Armstrong joana@vcd.hp.com Hewlett Packard, Vancouver Dogs: Copper Canyon's Belle Starr (aka Frannie) JHD (Aussie) Zoie Amazing Jumping Dog and Couch Potato (AussieXAirdale)