[stgt] [PATCH 1/2] tgt-admin: check if direct-device exists before allocating it

[ronnie sahlberg]

On Fri, Sep 12, 2008 at 12:25 AM, Tomasz Chmielewski <mangoo at wpkg.org> wrote:
> I will if it's not fixed when I send a bigger patch.
>
> To not duplicate work, the changes I'm working on currently are:
>
> - allow setting write caching per lun,
> - allow setting scsi_id, scsi_sn, product_id etc. other parameters, per lun
> - useful if one uses multipathd, but not only
>
> Any users of these features out there?
>

Excellent. I will use these features!

I would also like to be able specify the LUN for each backingstore,
not just that they always start at 1 and increment one by one.

I would like to specify the device type to use for each backingstore.
It currently assumes everything is a disk device.


later I would also like to be able to configure for individual LUNs
things like :
    Only these initiators can see/access this particular LUN.
    These particular initiators can see/access this LUN   but the LUN
is read-only for them.



When you design the algorithms for setting the serial numbers
automatically,    leave some reserved space in the field for
snapshots.
If in the future STGT gets the ability to snapshot a lun or a set of
luns, the snapshots should have different serial numbers than the
original production lun.
Maybe leaving the last 2 digits/characters in the serial number as 00
for all LUNs, later if snapshots are added they automatically get 01
02 03...



regards
ronnie sahlberg
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