[Stgt-devel] VTL - tgtadm syntax additions (Long)

[FUJITA Tomonori]

From: "Mark Harvey" <markh794 at gmail.com>
Subject: [Stgt-devel] VTL - tgtadm syntax additions (Long)
Date: Mon, 26 Mar 2007 10:19:21 +1000

> As the idea of hijacking the 'backing file' for use as a configuration
> file has not received the most positive resonse, I have put together
> some ideas for adding to the syntax of tgtadm to allow the
> configuration and customization of SSC and SMC devices.
> 
> I have not attempted to implement any of the syntax, but am posting to
> the list for comments before putting any effort into coding.
> 
> Here goes....
> 
> 
> tgtadm --lld iscsi --mode logicalunit --op update --tid=[] --lun=[]
> --value=[value]
> 
> Where value is:
> 
> If device_type == 1 (SSC)
> 
>  VendorIdent="SONY"
>  ProductIdent="SDX-900V"
>  ProductRev="5401"
>  SerialNumber="XYZZY_10"
> 
> If device_type == 8 (SMC), in addition to SSC values...
>  VendorIdent="STK"
>  ProductIdent="L700"
>  ProductRev="5400"
>  SerialNumber="XYZZY"
> 
> To configure
>  (Reserve address space)
>  ElementType=[1|2|3] StartAddress=[number] Quanity=[number]
> Sides=[1|2] (Single/double sided)
> 
>  (To reserve address space for 'drives')
>  ElementType=4 StartAddress=[number] Quanity=[number] Type="ssc|smc|sbc"
> 
>  (To 'tie' a previously known SerialNumber to this Address..)
>  ElementType=4 Address=[Within Range from above] SerialNumber="xxxxx"
> 
> To 'populate' slots with 'media'
>  ElementType=[2|3] BarCode="string"
> 
> where   ElementType 1 == Medium Transport (picker arm)
>        ElementType 2 == Storage Element (Slots in robot)
>        ElementType 3 == Import/Export Element (mailslots/Cartridge Access Port)
>        ElementType 4 == Data Transport (SSC/SBC/MMC device - Tape,
> Optical, CD/DVD)
> 
> Limits:
> VendorIdent, ProductIdent, ProductRev & SerialNumber can all be on one line...
> 
> For Medium changers
>  - We first need to 'reserve' number of slots for each element type:
>  - Then Tie device S/No to a slot
>  - Next fill Storage Slots and Import/Export with 'media'
> 
> 
> tgtadm --lld iscsi --mode logicalunit --op update --tid=[] --lun=[]
> VendorIdent="QUANTUM"
> tgtadm --lld iscsi --mode logicalunit --op update --tid=[] --lun=[]
> ProductIdent="SDLT600"
> tgtadm --lld iscsi --mode logicalunit --op update --tid=[] --lun=[]
> ProductRev="0001"
> tgtadm --lld iscsi --mode logicalunit --op update --tid=[] --lun=[]
> SerialNumber="XYZZY_10"

tgtadm adopts a syntax similar to open-iscsi. That is, it can do
something like:

tgtadm --lld iscsi --mode target --op update --tid 1 --name MaxRecvDataSegmentLength --value 16384

So why can't we do:

tgtadm --lld iscsi --mode logicalunit --op update --tid=1 --lun=0 --name VendorIdent --value QUANTUM