Re: Chunk down

Carroll, Kevin wrote: > > The Online Admin guide for Informix says that if a chunk is down, to "Use > UNIX utilities to determine what is wrong with the down chunk and then to > correct the problem and bring the chunk back to on-line mode." Can someone > expand on this and suggest what UNIX utilities are pertinent. As always, > thanks for your time. Your post is dated but I do not remember having seen it before, so... You can use 'dd' to make sure the disk is readable. Pipe that into 'od -x' and look to see that the pagenumbers and timestamps make sense (the first 2 pages of a chunk are not formatted, the first word of each 2K page is the page's physical address, second word is header timestamp and should match the last word on each page). Remember that od -x still shows offsets in octal. If you are using a volume manager use its utilities to verify that the disk stripe/mirror/RAID sets are still properly constructed. Check the system logs (usually /var/adm/messages) to see if there are any complaints about bad drives, power supplies or controllers. Art S. Kagel