Oninit cdi / Archive
Talk to an expert →

I/O bad request chunk 0

Posted in 2007

Topics: Installation, Setup & Upgrades, Storage & Space Management, Migration, Import/Export & Data Conversion

Abdullah Akoglu — — source: IIUG Forums & Mailing Lists

Hi, We have an Informix Dynamic Server 7.31.UD3 on a HP/UX 11.11 system. Recent days during onunload process (to a local file) informix started to generate the messages below in online.log file. I/O bad request chunk 0, pagenum 456, pagecnt 1 I/O bad request chunk 0, pagenum 464, pagecnt 1 I/O bad request chunk 0, pagenum 472, pagecnt 1 But the onunload ends successfully with no warnings in command prompt. We restored the database from this file on another system with onload. No warning in terminal or online.log. It restored the database. So there seems no problem. I have made a little search about this error and found this link. http://www-1.ibm.com/support/docview.wss?uid=swg21209432 IBM says this is a known deffect and recommends upgrade to UD4 or a higher version. Due to the restrictions of our application using informix, it is difficult for us to upgrade the Informix version. I want to know how this error affect our daily work. Especially the backup process. Anyone facing the same problem? Can we say that the backup taken with onunload is healthy without any doubt? Thanks Abdullah AKOGLU Bu e-posta mesaji kisiye ozel olup, gizli bilgiler iceriyor olabilir. Eger Bu e-posta mesaji size yanlislikla ulasmissa, icerigini hic bir sekilde kullanmayiniz ve ekli dosyalari acmayiniz. Bu durumda lutfen e-posta mesajini kullaniciya geri gonderiniz ve tum kopyalarini mesaj kutunuzdan siliniz. Bu e-posta mesaji, hicbir sekilde, herhangi bir amac icin cogaltilamaz, yayinlanamaz, para karsiligi satilamaz . Bu e-posta mesaji virus koruma sistemleri ile kontrol ediliyor olsa bile virus icermedigini garanti etmez ve meydana gelebilecek zararlardan dogacak hicbir sorumlulugu kabul etmez.Bu e-posta mesajindaki gorusler Vadeli Islem ve Opsiyon Borsasi A.S.'nin goruslerini yansitmayabilir ve kurumu baglayici degildir.

↪ replying to Abdullah Akoglu
ART KAGEL, BLOOMBERG/ 731 LEXIN — — source: IIUG Forums & Mailing Lists

Upgrade to v7.31UD4+ (I'd recommend going all the way to the current release (UD8 I believe) because of other interrum bug fixes, but if UD4 fixes your particular problem, makes you more comfortable, and you can pry it out of IBM's vaults, do that. xD4 is a maintenance release over xD3 so there will be no functional changes and never any change in disk structures. That means three things: 1- Upgrading to cD4+ will have no potential to harm your existing data. 2- Your software will not even know the difference. 3- If you install the new version in a different INFORMIXDIR, then if you do feel a need to rollback the upgrade for some reason, the rollback will be very fast (just shutdown, change INFORMIXDIR to point to the xD3 directory, and restart the instance). Art S. Kagel ----- Original Message ----- From: Abdullah Akoglu <ids@iiug.org> At: 7/05 6:59:05 Hi, We have an Informix Dynamic Server 7.31.UD3 on a HP/UX 11.11 system. Recent days during onunload process (to a local file) informix started to generate the messages below in online.log file. I/O bad request chunk 0, pagenum 456, pagecnt 1 I/O bad request chunk 0, pagenum 464, pagecnt 1 I/O bad request chunk 0, pagenum 472, pagecnt 1 But the onunload ends successfully with no warnings in command prompt. We restored the database from this file on another system with onload. No warning in terminal or online.log. It restored the database. So there seems no problem. I have made a little search about this error and found this link. http://www-1.ibm.com/support/docview.wss?uid=swg21209432 IBM says this is a known deffect and recommends upgrade to UD4 or a higher version. Due to the restrictions of our application using informix, it is difficult for us to upgrade the Informix version. I want to know how this error affect our daily work. Especially the backup process. Anyone facing the same problem? Can we say that the backup taken with onunload is healthy without any doubt? Thanks Abdullah AKOGLU Bu e-posta mesaji kisiye ozel olup, gizli bilgiler iceriyor olabilir. Eger Bu e-posta mesaji size yanlislikla ulasmissa, icerigini hic bir sekilde kullanmayiniz ve ekli dosyalari acmayiniz. Bu durumda lutfen e-posta mesajini kullaniciya geri gonderiniz ve tum kopyalarini mesaj kutunuzdan siliniz. Bu e-posta mesaji, hicbir sekilde, herhangi bir amac icin cogaltilamaz, yayinlanamaz, para karsiligi satilamaz . Bu e-posta mesaji virus koruma sistemleri ile kontrol ediliyor olsa bile virus icermedigini garanti etmez ve meydana gelebilecek zararlardan dogacak hicbir sorumlulugu kabul etmez.Bu e-posta mesajindaki gorusler Vadeli Islem ve Opsiyon Borsasi A.S.'nin goruslerini yansitmayabilir ve kurumu baglayici degildir. ******************************************************************************* Forum Note: Use "Reply" to post a response in the discussion forum.

↪ replying to ART KAGEL, BLOOMBERG/ 731 LEXIN
Jonathan Leffler — — source: IIUG Forums & Mailing Lists

I'd also look at the physical health of the disks - is there any indication of problems down at the hardware level (IDS logs; system logs). I might also look to run oncheck on the system. On 7/5/07, ART KAGEL, BLOOMBERG/ 731 LEXIN <kagel@bloomberg.net> wrote: > Upgrade to v7.31UD4+ [...] > > ----- Original Message ----- > From: Abdullah Akoglu <ids@iiug.org> > We have an Informix Dynamic Server 7.31.UD3 on a HP/UX 11.11 system. > Recent days during onunload process (to a local file) informix started > to generate the messages below in online.log file. > > I/O bad request chunk 0, pagenum 456, pagecnt 1 > I/O bad request chunk 0, pagenum 464, pagecnt 1 > I/O bad request chunk 0, pagenum 472, pagecnt 1 > > But the onunload ends successfully with no warnings in command prompt. > We restored the database from this file on another system with onload. > No warning in terminal or online.log. It restored the database. > So there seems no problem. > I have made a little search about this error and found this link. > http://www-1.ibm.com/support/docview.wss?uid=swg21209432 > IBM says this is a known deffect and recommends upgrade to UD4 or a > higher version. > Due to the restrictions of our application using informix, it is > difficult for us to upgrade the Informix version. > I want to know how this error affect our daily work. Especially the > backup process. > Anyone facing the same problem? > Can we say that the backup taken with onunload is healthy without any doubt? > Thanks > > Abdullah AKOGLU -- Jonathan Leffler #include <disclaimer.h> Email: jleffler@earthlink.net, jleffler@us.ibm.com Guardian of DBD::Informix v2007.0226 -- http://dbi.perl.org/ NB: Please do not use this email for correspondence. I don't necessarily read it every week, even.

↪ replying to Jonathan Leffler
Abdullah Akoglu — — source: IIUG Forums & Mailing Lists

I made an oncheck -cr and searched the system logs for disk problems. There seems no problem. I think this is something about informix memory area where system catalogs reside. Because chunk 0 is not a real chunk. I will contact the informix support. Art and Jonathan, thanks for your help -----Original Message----- From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of Jonathan Leffler Sent: Thursday, July 05, 2007 9:13 PM To: ids@iiug.org Subject: Re: I/O bad request chunk 0 [9519] I'd also look at the physical health of the disks - is there any indication of problems down at the hardware level (IDS logs; system logs). I might also look to run oncheck on the system. On 7/5/07, ART KAGEL, BLOOMBERG/ 731 LEXIN <kagel@bloomberg.net> wrote: > Upgrade to v7.31UD4+ [...] > > ----- Original Message ----- > From: Abdullah Akoglu <ids@iiug.org> > We have an Informix Dynamic Server 7.31.UD3 on a HP/UX 11.11 system. > Recent days during onunload process (to a local file) informix started > to generate the messages below in online.log file. > > I/O bad request chunk 0, pagenum 456, pagecnt 1 > I/O bad request chunk 0, pagenum 464, pagecnt 1 > I/O bad request chunk 0, pagenum 472, pagecnt 1 > > But the onunload ends successfully with no warnings in command prompt. > We restored the database from this file on another system with onload. > No warning in terminal or online.log. It restored the database. > So there seems no problem. > I have made a little search about this error and found this link. > http://www-1.ibm.com/support/docview.wss?uid=swg21209432 > IBM says this is a known deffect and recommends upgrade to UD4 or a > higher version. > Due to the restrictions of our application using informix, it is > difficult for us to upgrade the Informix version. > I want to know how this error affect our daily work. Especially the > backup process. > Anyone facing the same problem? > Can we say that the backup taken with onunload is healthy without any doubt? > Thanks > > Abdullah AKOGLU -- Jonathan Leffler #include <disclaimer.h> Email: jleffler@earthlink.net, jleffler@us.ibm.com Guardian of DBD::Informix v2007.0226 -- http://dbi.perl.org/ NB: Please do not use this email for correspondence. I don't necessarily read it every week, even. ************************************************************************ ******* Forum Note: Use "Reply" to post a response in the discussion forum. Bu e-posta mesaji kisiye ozel olup, gizli bilgiler iceriyor olabilir. Eger Bu e-posta mesaji size yanlislikla ulasmissa, icerigini hic bir sekilde kullanmayiniz ve ekli dosyalari acmayiniz. Bu durumda lutfen e-posta mesajini kullaniciya geri gonderiniz ve tum kopyalarini mesaj kutunuzdan siliniz. Bu e-posta mesaji, hicbir sekilde, herhangi bir amac icin cogaltilamaz, yayinlanamaz, para karsiligi satilamaz . Bu e-posta mesaji virus koruma sistemleri ile kontrol ediliyor olsa bile virus icermedigini garanti etmez ve meydana gelebilecek zararlardan dogacak hicbir sorumlulugu kabul etmez.Bu e-posta mesajindaki gorusler Vadeli Islem ve Opsiyon Borsasi A.S.'nin goruslerini yansitmayabilir ve kurumu baglayici degildir.

Glossary