[Info-vax] Looking for suggestions for new $GETDVI item codes

[Simon Clubley]

On 2015-01-15, JF Mezei <jfmezei.spamnot at vaxination.ca> wrote:
> On 15-01-15 20:29, Simon Clubley wrote:
>
>> For example, the filesystem needs to know the location of files by
>> LBA. You can work around that by using blocklets,
>
> How do other opearting systems handle devices with different physical
> block sizes ? Do they use virtual block addresses ?
>

In the case of ext2 and friends I don't have a full answer but they have
always decoupled the filesystem block size from the underlying physical
block size and having that support appears to have helped them here.

As for other filesystems the effort involved appears to vary enormously
by filesystem but I have not explored any specific low level details.

Having to explore 4096 byte sectors at a very low level is not something
I have (yet) had to do. :-)

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Microsoft: Bringing you 1980s technology to a 21st century world