Subject: Re: scsi DLT tape drives
To: Patrick Welche <>
From: Andy Ruhl <>
List: port-i386
Date: 07/07/2004 08:46:00
On Wed, 7 Jul 2004 15:58:54 +0100, Patrick Welche <> wrote:
> I just put together a box with:
>   mpt0 at pci2 dev 3 function 0: LSI Logic 53c1030 Ultra320 SCSI
> and two
>   sd0 at scsibus1 target 0 lun 0: <FUJITSU, MAS3735NP, 5B08> disk fixed
>   sd0: 70007 MB, 27094 cyl, 8 head, 661 sec, 512 bytes/sect x 143374650 sectors
>   sd0: sync (6.25ns offset 127), 16-bit (320.000MB/s) transfers, tagged queueing
> When I plugged the
>   st0 at scsibus1 target 6 lun 0: <BNCHMARK, DLT1, 5032> tape removable
> in, sd0 and sd1 disappeared. Tech support is claiming this is normal,
> and that the tape has to be the only scsi device on the bus. I am
> incredulous. What do you think?
> Agreed the disks can cope with 320MB/s rather than 20MB/s transfers...
> Trying the tape drive on its own, I get:
> st0: sync (100.00ns offset 15), 16-bit (20.000MB/s) transfers
> st0(mpt1:0:6:0): command timeout
> mpt1: timeout on request index = 0xfe, seq = 0x000000a7
> mpt1: Status 0x00000000, Mask 0x00000001, Doorbell 0x24000000
> mpt1: request state: On Chip
> st0: error 16 trying to rewind
> st0: WARNING: cannot revert to default density
> Is bad tape drive (communications) a possibility? or more to do with
> the medium?

I'd be more inclined to think that this is a termination problem.
Check your jumpers.

You REALLY don't want to be running a tape drive and a disk drive on
the same channel. If your card has another channel, use it. If not,
invest in another card.