Hi Daniel! The SAN Data Gateway uses High Voltage Differential SCSI interfaces by default. If your are using the default SCSI interfaces, your drives will probably be also HVD drives. They perform considerably less then the Low Voltage Differential drives. The specs on the IBM pages (sustained data transfer rate 15MB/sec native) are LVD transfer rates. You will never achieve this with HVD SCSI. However, 2.5 MB/sec is very slow. What's the SAN Data Gateway's microcode level? Kindest regards, Eric van Loon KLM Royal Dutch Airlines
-----Original Message----- From: Daniel Sparrman [mailto:[EMAIL PROTECTED]] Sent: Monday, February 11, 2002 06:58 To: [EMAIL PROTECTED] Subject: 3584 amd SDG R03 Hi We have a 3584 with 3 drives; 2 are SCSI attached through a San Data Gateway R03, and one drive is direct FC attached to a switch. We're using this library with a IBM P-Series 610 with one FC adapter. The problem is that the performance of the 2 SCSI drives attached to the SDG is very poor. The FC drive has a good performance and can reach speeds up to 27MB/s, but the SDG will only reach about 4-5MB/s, which shoulod mean 2-2.5MB/s per drive. The 3584 drives(both SCSI and FC) are upgraded to the last level of firmware(was done a week ago), and the library is at level 2250. Is this a know problem with the San Data Gateway? We should at least be able to reach about 10-15MB/s thought the SAN Data Gateway. Appreciates any help I can get. Best Regards Daniel Sparrman ********************************************************************** For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. **********************************************************************
