I rebooted and determined the DLT drive is on the 2nd controller on the R=
AID perc 3/di card it is the only item on the 2nd controller and it is on=
scsi id 6.
The problem was that the active terminator had been pressed on (at the fa=
ctory) and had fallen off actually the terminator was permanently attache=
d but it had become disconnected. So I replaced the scsi cable and them =
the dd command worked great. =
Thanks goes out to all the people who read the post and provided some gre=
at insight. =
Jim
> =
> From: "der.hans" <PLUGd@LuftHans.com>
> Date: 2003/08/02 Sat PM 03:19:56 EDT
> To: plug-discuss@lists.plug.phoenix.az.us
> Subject: Re: Re: DLT and Debian
> =
> Am 01. Aug, 2003 schw=E4tzte elemint@cox.net so:
> =
> > I tried the dd command although I got a error message: "/dev/st0': In=
put/output error"
> >
> > dd if=3D/dev/zero of=3D/dev/st0 count=3D1 bs=3D32768
> > 1+0 records in
> > 1+0 records out
> > dd: closing output file `/dev/st0': Input/output error
> =
> Does status show the tape as readonly?
> =
> The previous status you posted didn't.
> =
> What kernel are you using? ( uname -a )
> =
> > Is it possibly because the scsi id of the tape appears to be the same=
as
> > the scsi card. Although there are multiple scsi cards on the machine =
so
> =
> How does the ID of the tape drive appear to be the same as the ID of th=
e
> card? If it was you wouldn't be able to see the drive :).
> =
> In /proc/scsi there are subdirectories for each of the controllers. The=
> filenames in the controller subdirectories are numbers reflecting which=
SCSI
> controller it is.
> =
> > I am not sure if the tape drive is on the same card that has scsi id =
6;
> > although it appears to be.
> >
> >
> =
> Do you only have one SCSI controller on the box?
> =
> The tape drive should generally not be on the same controller as the ha=
rd
> drives you're backing up.
> =
> > Attached devices:
> > Host: scsi3 Channel: 00 Id: 06 Lun: 00
> > Vendor: DELL Model: 1x6 U2W SCSI BP Rev: 5.35
> > Type: Processor ANSI SCSI revision: 02
> > Host: scsi3 Channel: 01 Id: 06 Lun: 00
> > Vendor: QUANTUM Model: DLT7000 Rev: 2561
> > Type: Sequential-Access ANSI SCSI revision: 02
> =
> scsi3 means it's the 4th SCSI controller. Not sure where the first thre=
e
> are. Maybe it's due to loading the driver, unloading the drive, loading=
the
> driver, unloading the driver, etc. Channel 01 means the controller has
> multiple SCSI chips in it and you're on the second chip. The SCSI ID fo=
r the
> tape drive is 6. The controller is normally ID 7. LUN is important if y=
ou
> have multiple devices that all share one SCSI ID.
> =
> grep "Target IDs" /proc/scsi/*/3
> =
> That will show you which SCSI IDs are in use on that controller and sho=
w you
> which ID the controller is using.
> =
> grep "Target IDs" /proc/scsi/*/?
> =
> That'll get ID info for all of your SCSI controllers.
> =
> > Host: scsi3 Channel: 02 Id: 00 Lun: 00
> > Vendor: MegaRAID Model: LD0 RAID5 34556R Rev: 1.01
> > Type: Direct-Access ANSI SCSI revision: 02
> =
> Your RAID device is on a different SCSI chip on the same controller as =
the
> tape drive. I'm not sure if that's an issue. They should have their own=
> bandwidth. As long as the controller can handle both chips getting maxe=
d out
> you should be fine. I haven't done any testing with this type of scener=
io,
> so I'm not certain. Controller docs might let you know.
> =
> ciao,
> =
> der.hans
> -- =
> # https://www.LuftHans.com/ http://www.AZOTO.org/
> # The Internet is the front line of the battle
> # to protect our freedom. -- Nathaniel Borenstein
> =
> =
> =
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