Re: SCSI write errors with Onstream ADR50 drive

From: Tom Sedge (tom@cognality.com)
Date: Mon Apr 03 2000 - 12:24:49 EST

On Mon, 3 Apr 2000, Ha Quoc- Viet wrote:

> Tom Sedge wrote:
> >
> > Hi,
> >
> > We've installed a new Onstream ADR50 drive (SCSI Ultra 3 LVD bus). It is
> > sitting in a machine with the following spec:
> >
> > ASUS P2DS motherboard
> > 2 x Dual PII 400Mhz
> > 384RAM
> > Onboard Adaptec 2940U2W SCSI Ultra 3 LVD bus
> > 1 x Seagate Cheeta 9.1Gb SCSI drive
> > 3 x Seagate Cheeta 18.2Gb SCSI drives
> > D-link DFE530TX 10/100 Ethernet PCI
> > RedHat Linux 6.1 patched to kernel 2.2.13 + ac3 (SMP).
> > Software raid 5 across the 3 18.2Gb drives (not the boot drive)
> >
> > The drive is properly recognised and reported on startup, and assigned to
> > /dev/st0.
> >
> > All is well until we try reading or writing to a tape. The drive starts
> > to show write/read behaviour and then nothing happens for a minute or so
> > until a large number of SCSI write errors are reported by the kernel. At
> > this point the SCSI bus seems to go bananas an the hard drive light goes
> > fully on. The machine then stops responding and a reset is needed (to
> > reset the SCSI bus). After coming back up the machine is fine, and no
> > problems occur unless we try accessing the drive. Nothing is logged in
> > the system logs and there are no 'oopses'.
> >
> > We've checked for SCSI Id conflicts and termination of the bus. Both seem
> > to be ok. Could this be an SMP problem? The addition of the ADR drive is
> > the only change to this machine recently.
> >
> > If anyone can help, I'd be most grateful.
>
> Have a look at Documentation/configure.help
> grep for "OnStream".
> it's written that no support is available for the SC-30
> and SC-50 versions. DI-30 is working though (minus a few glitches)
> but it's IDE ...
>
> don't know how recent is this document though ...

Thanks for the helpful advice but I'm afraid you're out of date here.
The onstream ADR50 is designed to work seamlessly with the Linux SCSI
layer - that's the whole point about their new rane. SC-30 and SC-50 are
older drives.

Thanks anyway.

Best Regards,

Tom. 

--
Cognality Ltd.      tom@cognality.com   Where dreams become reality....

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