Integrated File System Introduction

 

Using *TYPE2 directories in OS/400 V5R1

The "root" (/), QOpenSys, and user-defined file systems (UDFS) in the integrated file system support the *TYPE2 directory format in OS/400 V5R1. The *TYPE2 directory format is an enhancement of the original *TYPE1 directory format. *TYPE2 directories have a different internal structure from *TYPE1 directories and provide improved performance and reliability.

If you have V5R1, you can convert your V5R1 directories to the *TYPE2 directory format. It is recommended that you convert to the *TYPE2 directory format before installing a new release of OS/400. This is necessary because the directory conversion may automatically be done during the installation. The impact of an automatic conversion during install is that the time required for the installation will be significantly increased.

If you upgrade to OS/400 V5R1 or V5R2, automatic conversion to the *TYPE2 directory format does not take place. You do not need to convert your directories prior to these installs.

The support for *TYPE2 directories in V5R1 is available through fixes (PTFs). The conversion utility is slightly different from the V5R2 version. Refer to the informational APAR II13161 for complete documentation on *TYPE2 directories in V5R1. Use one of the following methods to access the APAR:

  1. Download the informational APAR to your iSeries server and view it. Use the following commands: 
    SNDPTFORD PTFID((II13161))
DSPPTFCVR LICPGM(INFOAS4) SELECT(II13161)
  2. Go to http://www-912.ibm.com www site Web site to view the informational APAR online. Select Authorized Program Analysis Reports (APARs) --> V5R1 APARs --> APAR number II13161.

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