[Info-vax] ODS-5 to ODS-2 Data Migration

[Stephen Hoffman]

On 2018-02-22 15:50:44 +0000, Zane H. Healy said:

> Is there a good way to determine if a directory structure contains data 
> that requires an ODS-5 filesystem?  Basically I want to find what data 
> on a disk requires ODS-5, and what can be moved to an ODS-2 drive.

I'm not aware of a tool that will scan for uses of the file name length 
or the permissible character set or the permissible directory depth.    
Maybe do a BACKUP and then do a diff of the files and names on the 
source and the target, as BACKUP can revert to ODS-2.   But given I 
acquired a half-dozen 300 GB SCSI drives a month or two back for US$125 
for a migration project, my whole approach to storage on OpenVMS 
servers also tends to get skewed...  Or just upgrade the target disk to 
ODS-5, as that's transparent to all but a very few ODS-2 apps.  
Interestingly. PCSI was one of the few apps that was sensitive to ODS-2 
and ODS-5, too.  Whoops.


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