Re: Bridging fc to scsi for NetApp filer backups

"Faeandar" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Is that a per stream rate?  How many streams?

Yes its per stream. Is that good or can it be tweaked further?
We use Netbackup NDMP. not sure if increasing the stream would improve
performance, I think 18995 KB/s is near the rated capacity of an LTO drive,
(15MB/second native, 30MB/second compressed)?

>In all but the first
> case the switch has bnever been part of the problem.  We do dwdm for
> some of the filers hence the fc switches.  Also, all the local filers
> won't fit directly onto the bridge.
We don't backup the filers directly, all of them snapvault to the R150 and
we then backup the R150 to tapes monthly.

>
> Can you post the firmware version you're using?
Firmware of FC bridge model: StorageTek SN3250 Router Version: 3.06 2009j
> Are you chaining any
> drives off the bus?
No. R150 has a  FC adaptor connected to one crossroad bridge. which has 2
LTO SCSI LVD drives attached to it in a L700. Robot controlled by the
netbackup master server running on solaris.

>Question bombardment I know, but it's nice to
> hear someone is able to use it and I'd like to be able to duplicate
> that....
>
> Thanks.
>
> ~F
>
> On Wed, 19 Nov 2003 02:13:50 GMT, "Net Worker" <[EMAIL PROTECTED]>
> wrote:
>
> >We have a filer (R150) that uses fiber to connect to an L700 via a
crossroad
> >bridge (1 Gig 1/f).
> >No problems so far, but we don't have  a fiber switch in between,
> >just R150-> crossroad.-> tape drives
> >Performance averages 18995 KB/s
> >-G
> >
> >"Faeandar" <[EMAIL PROTECTED]> wrote in message
> >news:[EMAIL PROTECTED]
> >> On Tue, 18 Nov 2003 21:06:09 +0100, "Rene Koehnen-Wiesemes"
> >> <[EMAIL PROTECTED]> wrote:
> >>
> >> >> Performance blows, every weekend when we run fulls something goes
into
> >> >> the weeds, and everytime (but once) it's been the bridge.
> >> >>
> >> >
> >> >Please provide us with more details about the problems you have.
> >> >
> >> >Rene
> >> >
> >>
> >> Well, they're all over the board but they always start with
> >> performance dropping to it's knees.  The bridge has very little in the
> >> way of online diags so inevitably the solution is reboot the bridge.
> >> Everything from buffer overflows to mis-presenting scsi id's.
> >>
> >> I'm looking more for information from people who already have this
> >> sort of setup and what they think of it.  Not necessarily a bridge but
> >> filers using fiber to backup.
> >> Ideally I'd go stright to fiber drives but SDLT has no native fiber
> >> yet.
> >>
> >> ~F
> >
>