Recover a bad chunk
musman asked how to recover a bad chunk or copy one chunk to another. PC User (Art S. Kagel) said to replace the drive, relink the chunk path and restore the dbspace from archives, and to use mirroring or RAID1/3/4/10 in future, not RAID5. Tim Schaefer asked why Informix mirroring; Art said it was easiest to implement for a site with no redundancy.
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Hi If one chunk goes bad, what are the various methods to recover the chunk or how to copy one chunk to another. Any suggestions? regards usman musman@iffco.com Sent via Deja.com http://www.deja.com/ Before you buy.
musman@my-deja.com wrote: > Hi > > If one chunk goes bad, what are the various methods to recover the > chunk or how to copy one chunk to another. > The best you can do is replace the bad drive, relink the chunk path link to the new partition/device, and restore the entire dbspace from the latest archive(s). > > Any suggestions? Several: Informix Mirroring! OS Mirroring! RAID1! RAID3! RAID4! RAID10! Art S. Kagel PS - Notice the conspicuous absence of RAID5.
Art, I'm curious why you recommend Informix mirroring. Thanks in advance... Tim PC User wrote: > > musman@my-deja.com wrote: > > > Hi > > > > If one chunk goes bad, what are the various methods to recover the > > chunk or how to copy one chunk to another. > > > > The best you can do is replace the bad drive, relink the chunk path link > to the new > partition/device, and restore the entire dbspace from the latest > archive(s). > > > > > Any suggestions? > > Several: > > Informix Mirroring! > OS Mirroring! > RAID1! > RAID3! > RAID4! > RAID10! > > Art S. Kagel > > PS - Notice the conspicuous absence of RAID5. -- . .- .-- .--- .---- Tim Schaefer .----- tschaefe@bellsouth.net .---- http://www.inxutil.com .--- .-- .- .
Tim Schaefer wrote: > Art, > > I'm curious why you recommend Informix mirroring. I's a viable option. If M. Musman lost data when a chunk went south, obviously the site is not using ANY redundancy and Informix mirror is the quickest and easiest to implement. Most of the other redundancy options would require reconfiguring their entire disk farm. Therefore I placed that option at the top of the list. Looking back I probably placed the options in order of increasing preference. Art S. Kagel > > > Thanks in advance... > > Tim > > PC User wrote: > > > > musman@my-deja.com wrote: > > > > > Hi > > > > > > If one chunk goes bad, what are the various methods to recover the > > > chunk or how to copy one chunk to another. > > > > > > > The best you can do is replace the bad drive, relink the chunk path link > > to the new > > partition/device, and restore the entire dbspace from the latest > > archive(s). > > > > > > > > Any suggestions? > > > > Several: > > > > Informix Mirroring! > > OS Mirroring! > > RAID1! > > RAID3! > > RAID4! > > RAID10! > > > > Art S. Kagel > > > > PS - Notice the conspicuous absence of RAID5. > > -- > . > .- > .-- > .--- > .---- Tim Schaefer > .----- tschaefe@bellsouth.net > .---- http://www.inxutil.com > .--- > .-- > .- > .