It seems this solution will only cause trouble ..!
So, I want to avoid having all app servers fight for
bandwidth by using the existing fiber. The document
José referred to (thanks!) says don't use the same HBA
as for disks because you kill it with a reboot, plus a
lot of other warnings.
But there are at least 2 people using it out there, I
don't know how similar a configuration but you said it
worked, maybe at least the storage node on a cluster
and not necessarily with DDS.
I am just frustrated because Legato announced DDS
support on MSCS last year and turns out it is under so
many restrictions. SCSI definitions, lack of OS
support, lack of compatibility between FC products
manufacturers, call them what you want but things are
just not ready.
I thought on going around it by making just one
physical member a storage node and share with the
server, hoping a reboot of this new storage node will
not corrupt my data. If it's not up, I'll let its
backup crowd my net.
Thanks for your suggestions and specially for your
warnings.
Best regards,
Aure.
--- Carolina Garcia Santacruz
<carolina.garcia.santacruz AT proact DOT dk> escribió: >
Aure,
>
> Regarding the SCSI reserve release issue, you find
> it in the release notes
> from 6.1 (and up), page 21:
> "Bus Reset Can Rewind Tape on Devices Shared by
> Multiple Computers"
>
> I think it is important that you read it and take it
> into consideration. You
> are going to share your tape drive with at least
> another server, plus you
> are carrying SCSI commands for your disks from the
> same HBA. One important
> line there is that Microsoft does not support
> attaching any tape drive
> to any shared SCSI bus that also hosts
> cluster-controlled disks.
>
> Some tape devices (IBMs LTO at least) include this
> control and the rest are
> planning on implementing it. SCSI 3 definition will
> include it. Some OS can
> handle it --not MicroSoft AFAIK--. The patch I
> mentioned will prevent the
> tapes from being overwritten, but does not work on
> the problem itself. I
> don't see it as something that should stop you, but
> take some preventive
> action.
>
> Hope this helps,
> Carolina
>
> -----Original Message-----
> > From: Aurea Cruz [mailto:aurecruz AT YAHOO DOT COM]
> > Sent: 30. juni 2003 10:38
> > To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
> > Subject: Re: clustered storage nodes installation
>
> <<...>>
>
> > I have been trying to find something about SCSI
> reserve in Legato's
> > knowledge base but there doesn't seem to be much
> written. Is this really
> > still an issue? The admin guide on 6.1.x does not
> mention it, have not
> > checked in that for version 7. Should I stay out
> of it because of that? I
> > can't afford dedicating a drive to this cluster.
> >
> <<...>>
>
>
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