I found a nice website explaining the different types of SCSI, it's at:
http://www.cablingdirectory.com/techinfo/scsiinfo/scsi.htm

Check if you can find a small symbol next to the connector on the SCSI card
indicating what type of SCSI it is. The LVD and HVD/Differential symbols
differs (see the webpage for a picture).

Regards, Hans

-----Original Message-----
From: Loon, E.J. van - SPLXM [mailto:[EMAIL PROTECTED]]
Sent: Monday, February 11, 2002 12:42 PM
To: [EMAIL PROTECTED]
Subject: Re: 3584 amd SDG R03


Hi Arnoud!
Let me first say this: I'm not a SCSI expert!
The difference between LVD and HVD SCSI is hardware related.
LVD, which stands for Low Voltage Differential, is also called Ultra 2 or
Fast-40 SCSI. It uses 3 volt instead of 5 volt logic level and is not
directly compatible with the "old" differential (HVD) SCSI. LVD doubles SCSI
data throughput. Cable lengths are 12 m (40 ft). Single initiator-single
target applications may use up to 25 m (82 ft) of cable.
I don't know if there is a way you can physically see if you have a LVD or a
HVD drive or card. As far as I know the SAN Data Gateway comes with 4 HVD
connectors by default. The LVD adapter is a separate feature (FC 2840).
Kindest regards,
Eric van Loon
KLM Royal Dutch Airlines

-----Original Message-----
From: PAC Brion Arnaud [mailto:[EMAIL PROTECTED]]
Sent: Monday, February 11, 2002 11:11
To: [EMAIL PROTECTED]
Subject: Re: 3584 amd SDG R03


Hi Erick,

I saw your last mail, and I'm wondering how you can check if you're
using HVD or LVD interfaces. Is it related to the SDG's hardware, or
just a question of microcode ? Could you please give us some
informations ?
Thanks in advance.

Arnaud

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