DF / SE confusion

[Enno Baars]

Hello!

Looking at the disk modules installed in our A3311A "Jamaica" HA Storage System I stubled over some strange fact:

* All disk modules are labeled "DF" and are connected to a "DF" Interface on our server
So these are "differential SCSI" modules.

* ioscan reports these disks to be of type "Seagate ST19171N". According to Seagate these drives have a "SE" interface.
So the bare drives are "single-ended SCSI".

Now how can this be?
Does the module case (which encloses the bare drive) do some SE <-> DF conversion?

Any information is appreciated!

Cheers,
Enno.

p.S. This thread has been moved from Disk to Disk array. - Hp Forum moderator

[Robert_Jewell]

HP may be able this better, but I have seen this same thing in these drives (an ST34573WC can be either SE or DF). I had taken the module apart (not recommended by the way) and there was an adapter of sorts attached to the drive.

-Bob

[Vincent Fleming]

As I recall, the product number reported in the response to the SCSI Inquiry command that ioscan issues does not distinguish the bus type in Seagate drives.