As per STK currently, IBM LTO drive firmware 27Q1 is the only available
supporting code.
Also ATK recommended to keep a record of the dWWN configuration should be kept.
It is essential with the dWWN feature to eiminate system issues in the case
of an MPC/MPCL failure.What is meant by MPC/MPCL failure?
Rag
-------------- Original message --------------
> We are using this "feature". It has an advantage if you need to
> replace a drive for some reason. The WWNs are configured into
> the drives when the library IPLs (Resets). This way you do not
> have to configure any zoning or drive to WWN bindings on the host.
>
> The problem we have at present, is that if the drive is power
> cycled, it does not configure itself correctly. (I suspect,
> although I have not determined conclusively, that the WWN is
> not set under this condition). If I reset the library the
> drive comes on line with the library-assigned WWNs.
>
> My library firmware is
>
> Code Version: 3.07.00
> Build Date: Feb 6 2004 17:24:09
>
> And the drives are IBM LTO Ultrium 1
>
> Vendor SCSI Product ID Rev Device Type
> ---------- ------------------ ------ ---------------
> 'IBM ' 'ULTRIUM-TD1 ' '4561' 1 = Sequential Access (Tape)
>
> I am getting a firmware upgrade next week, so I might find if the
> problem disappears.
>
>
> On 30/09/2005, at 1:22 AM, Maiello, Robert wrote:
>
> > I'll ask my engineer also. It may be dependent on what type of
> > HBAs your
> > using and how they are
> >
> > zoned. What library firmware are you using? I must not have this
> > enabled because all my drives
> >
> > have a port WWN and a node WWN..both of which are similar; both are
> > from the
> > FC drive itself
> >
> > and change with the drive.
> >
> >
> >
> > You could check the WWN cache of your switch to see what number it is
> > seeing. It would be really
> >
> > neat to override the tape drive's WWN and have the library present
> > the same
> > ones all the time.
> >
> >
> >
> >
> >
> >
> >
> > Robert Maiello
> >
> > Pioneer Data Systems
> >
> >
> >
> > _____
> >
> > From: kraghava AT comcast DOT net [mailto:kraghava AT comcast DOT net]
> > Sent: Thursday, September 29, 2005 10:36 AM
> > To: Maiello, Robert; NETWORKER AT LISTSERV.TEMPLE DOT EDU; Raghava Karu
> > Subject: Re: Dynamic WWNs for FC tape drives
> >
> >
> >
> > Yes, we were told by Storagetek Engineers on L700e it is possible, if
> > library IPL'd. What IPL mean ? When dWWN was enabled on library, we
> > are
> > seeing two wwns for each drive in library front panel. But don't
> > know which
> > wwn will be recognised by SAN switch?
> >
> >
> >
> > Thanks
> >
> > Rag
> >
> >
> >
> > -------------- Original message --------------
> >
> >
> >> Is this possible on the L700? Our drives go right to the switch. Can
> >> the library override/rewrite the WWN of a drive?
> >>
> >> Robert Maiello
> >> Pioneer Data Systems
> >>
> >> On Fri, 23 Sep 2005 15:58:18 +0000, Raghava Karu wrote:
> >>
> >>
> >>> Hi,
> >>> We want to enable the dynamic WWN feature on L700 and for LTO II FC
> >>>
> > drives.
> >
> >> How do I enable it on L700 and what are the configurations needs
> >> to be
> >>
> > made
> >
> >> on backup server, storagenodes.
> >>
> >>>
> >>> Each drive should be shared by backup server, and 4 storagenodes
> >>> in SAN
> >>>
> >> environment. Please also share me if you are noticing any issues
> >> with dWWN
> >>
> >
> >
> >> feature.
> >>
> >>>
> >>> Thanks in advance,
> >>> Raghava
> >>>
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