Re: Help, tbtape is trashing my rootdbs!

In article <jgabriel.724605386@academ01> jgabriel@academ01.mty.itesm.mx (Ing. Juan Gabriel Ruiz) writes: >davek@informix.com (David Kosenko) writes: >>What you should do is run a low-level disk surface check on the devices you >>are using for your chunks. Typically, this problem is caused by bad blocks >>present on the device. > >>As per bringing your system back up after a "bad block experience": if you >>edit your tbconfig file and set MIRROR to 1, you will be able to restart >>your system even though the chunk is marked as down. > >I don't understand your information, you're saying that we need a very >clean hard disk to make Informix work, and I understand with this that >Informix doesn't have a bad block rellocation schema and I think this >is elemental. >In other way, you said that if we set MIRROR=1 we'll be able to restart >the system, but at what cost, doble disk space needed?? The price is that you are risking data integrity. If you are not using mirroring, and a chunk is marked off-line because data integrity cannot be assured, the system is not supposed to go into the on-line mode until you have restored an archive or rebuilt the system. Bug 11351 is the bug that systems with the MIRROR flag set to 1, but no real mirroring, will come on-line because OnLine mistakenly believes it can use a mirror instead of the off-line chunk. Craig > >-- >Juan Gabriel Ruiz Pinto Internet: jgabriel@mtecv2.mty.itesm.mx >Soporte Equipos UNIX NeXT-mail: jgabriel@roxette.mty.itesm.mx >Depto. de Tecnologia Computacional >I.T.E.S.M. Campus Monterrey -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Craig Browning Regency Support Informix Software, Inc.