[CentOS] Mixing SCSI devices on a single i/f

Will McDonald wmcdonald at gmail.com
Wed Sep 21 15:06:16 UTC 2005

On 21/09/05, James B. Byrne <ByrneJB at harte-lyne.ca> wrote:
> I have an external HP SureStore DLT VS80 with a SCSI LVD 68 pin
> interface and an external HP SureStore DAT24 with a SCSI Centronics
> 50 pin Narrow SE interface.  The cable for the DAT has a Centronics
> connector at one end and a 68 Pin Wide to Narrow terminated
> connector at the other. The cable for the DLT has a LVD/SE 68 pin
> connector at both ends.  I have terminator blocks for both devices.
> If I connect the devices thus:
> terminator --> DAT --> DLT --> scsi_hostadapter (boot hangs)
> Then the system hangs when booting.  I can get the system to boot
> up form this point by turning off both external tape drives.  If I
> connect the devices individually then the host boots and the system
> can access which ever is attached to the host.
> terminator --> DLT --> scsi_hostadapter (boots, device accessible)
> terminator --> DAT --> scsi_hostadapter (boots, device accessible)
> My question is: Is it possible to daisy-chain these two devices to
> the host in manner that permits the system to boot and access both;
> and if so, how does one accomplish this?

Are you mixing HVD and LVD cabling? What are the SCSI IDs for each of
the tape drives?


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