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

[Zane H. Healy]

Stephen Hoffman <seaohveh at hoffmanlabs.invalid> wrote:
> 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.

Mounting on SIMH VAX seems to work pretty well for finding the data.  Using
directory sizes seen works fairly well.  As it turns out basically all of
the ODS-5 data is nothing I want to migrate.  

I have some newer, and significantly larger drives, and will very likely
also copy the data to them.  Part of the purpose of this exercise is to get
copies of the data before I start messing with the XP1000's configuration.

Zane