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Operating Systems AIX IO queue maxtime over 1 minute Post 303010776 by agent.kgb on Saturday 6th of January 2018 05:53:47 PM
Old 01-06-2018
you don't show all the errors. SC_DISK_ERRs, you see, are SCSI timeout. They can be caused by SAN bottlenecks (such as lack of buffers) as well as by AIX settings. Storage device can cause such problems too. The easiest (and I think the fastest) way to solve the problem is to open a PerfPMR at IBM. You have IBM server, IBM operating system and IBM storage. They're interested in solving the problem as fast as possible.

If you'd like to analyze the problem further, you must first provide the information about the operating system and the storage.

  • which version do you have? oslevel -s
  • which version of storage drivers?
  • settings of the FC adapters? (for i in $(lsdev -l fcs* -F name) ; do echo $i ; lsattr -El $i ; lscfg -l $i; done
  • settings of FSCSI devices? lsattr -El fscsiX
  • Output of fcstat command for each FC HBA
  • full errpt output, because you provided just a short excerpt


It is just a small amount of questions I can remember after celebrating russian Christmas. IBM will ask more questions for sure, and will ask to run some scripts to gather the necessary information.

Moderator's Comments:
Mod Comment edit by bakunin: surrounded commands with ICODE-tags. Please use them for code-snippets so that they stand out better. Thank you!

Last edited by bakunin; 01-08-2018 at 09:59 AM..
 

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euctoibmj(1)							   User Commands						      euctoibmj(1)

NAME
euctoibmj, ibmjtoeuc - Code conversion between Japanese EUC and IBM-Japanese SYNOPSIS
euctoibmj [-t] [-u code] [-U] [filename...] ibmjtoeuc [-u code] [-U] [filename...] AVAILABILITY
SUNWjfpu DESCRIPTION
euctoibmj converts the contents of the specified filenames from ASCII/ Japanese EUC to EBCDIC/IBM-Japanese. ibmjtoeuc converts the con- tents of the specified filenames from EBCDIC/IBM-Japanese to ASCII/ Japanese EUC. The both commands write the resultant code to stdout. If filename is not given, input characters are read from the standard input. For Japanese language handling, the euctoibmj/ibmjtoeucj pair of commands provide conversion only between the two code standards. Code con- version among Japanese EUC, JIS, and PC kanji are supported by another set of commands, jistoeuc(1) family or iconv(1). OPTIONS
-u code With this option specified, characters in one code set that do not have corresponding characters in the other are mapped to the code given in four-digit hexadecimal HOST CODE of IBM Japanese (for euctoibmj) or in four-digit JIS Ku-Ten code (for ibmjtoeuc). Without this option, such characters are mapped to HOST CODE 4040 (for euctoibmj) or JIS Ku-Ten code 0101 (for ibmjtoeuc). -U The output is not buffered (The default is buffered output). -t With this option specified, euctoibmj translates Half-Size Katakana (Code Set 2) in Japanese EUC to the corresponding characters in Code Set 1 prior to conversion. Without this option, Code Set 2 characters in Japanese EUC are processed to the illegal charac- ter. ENVIRONMENT VARIABLES
The environment variables LC_CTYPE and LANG control the character classification throughout these commands. For euctoibmj and ibmjtoeuc to work correctly, one or both of the environment variables must be set to ja or an equivalent locale. On entry to these commands, these envi- ronment variables are checked in the following order: LC_CTYPE and LANG. When a valid value is found, remaining environment variables for character classification are ignored. FILES
/usr/lib/jcodetables/ibmj-euc Code conversion table for IBM Japanese. SEE ALSO
iconv(1), jistoeuc(1), iconv_ja(5) DIAGNOSTICS
unexpected data encountered in input. Illegal character code is found in input file. BUGS
The ASCII/EBCDIC conversion table are taken from the 256 character standard in the CACM Nov, 1968. The conversion, while less blessed as a standard, corresponds better to certain IBM print train convertions. There is no universal solution. The Japanese EUC/IBM Japanese conversion table is based on the IBM Kanji codebook (4th edition - September 1987), JIS X 0201, and JIS X 0208-1983. If JIS X 0212 caracter set is specified as input, euctoibmj can not support the conversion correctly. SunOS 5.10 10 Jan 2003 euctoibmj(1)
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