Seems a tad risky for "convert on next mount" -- not to presume there is a current/BEFORE backup, just in case...
With one client, we are considering a manual migration task-activity - monitoring progress (with version-info listed) using current-state / inventory command: zfsadm aggrinfo -long Scott Barry SBBWorks, Inc. On Wed, 6 Jun 2018 12:24:21 -0700, Lizette Koehler <[email protected]> wrote: >List - > >Just thought I would share this information should you want to move from v4 to >v5 zFS files. This is for z/OS V2.1. You would need to check for your level >of >z/OS. > > > >There is a parm you can use to set the default format of a zFS filesystem to V5 >in IOEFSPRM. > >format_aggrversion=4 Sets the default format for new zfs datasets to v4 >format_aggrversion=5 Sets the default format for new zFS datasets to v5 > > >I am afraid there is no mass conversion utility, but there is something you >might find useful and that is the > >change_aggrversion_on_mount > >IOEFSPRM option. With this option enabled zFS v4 datasets would be converted to >v5 then next time they are mounted. This can also be done with the converttov5 >configuration option in IOEPRMxx or with CONVERTTOV5 on the mount command >itself. To maximize the conversion I would enable both > >change_aggrversion_on_mount and > >CONVERTTOV5. > >See this manual on z/OS Moutn command: https://ibm.biz/BdrTcb > >CONVERTTOV5 | NOCONVERTTOV5 > Specifies whether a zFS read/write file system is assigned the converttov5 >attribute. If it is assigned the converttov5 attribute and the aggregate is a >version 1.5 aggregate, zFS automatically converts directories from v4 to >extended (v5) as they are accessed. If the converttov5 attribute is assigned at >primary mount time, a version 1.4 aggregate is changed to a version 1.5 >aggregate. > > If automatic directory conversion for a directory fails, the conversion is >not attempted again until the file system is unmounted and mounted again. > > The converttov5 attribute can also be assigned if the MOUNT option is not >specified but the converttov5 specification in the IOEFSPRM file is on when the >file system is mounted or remounted. > > The default is NOCONVERTTOV5. However, the converttov5 attribute can also > be >assigned if the converttov5 specification in the IOEFSPRM file is on when the >file system is mounted or remounted. > > > > >Lizette Koehler >statistics: A precise and logical method for stating a half-truth inaccurately > >---------------------------------------------------------------------- >For IBM-MAIN subscribe / signoff / archive access instructions, >send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
