Hi Orville! I don't think this is really necessary since LTO2. LTO1 performance does suffer when you can't keep the drive streaming, but LTO2 and 3 adjust their tape speed if they detect that the amount of incoming data is too low. So there should not be any back-hitching here... Kindest regards, Eric van Loon KLM Royal Dutch Airlines
-----Original Message----- From: Orville Lantto [mailto:[EMAIL PROTECTED] Sent: Tuesday, February 08, 2005 21:33 To: ADSM-L@VM.MARIST.EDU Subject: Re: Number of HBA's Don't forget drive compression when making throughput calculations! 80 MB/sec * 4 (compression of text data) =320 MB/second as the maximum available bandwidth per LTO-3 drive. Good Luck keeping ONE of these beasts streaming with high compression! Orville L. Lantto Datatrend Technologies, Inc. (http://www.datatrend.com) IBM Premier Business Partner 121 Cheshire Lane, Suite 700 Minnetonka, MN 55305 Email: [EMAIL PROTECTED] CONFIDENTIALITY NOTICE: This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. Ben Bullock <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> 02/08/2005 02:10 PM Please respond to "ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> To ADSM-L@VM.MARIST.EDU cc Subject Re: Number of HBA's The documents say you are supposed to NOT have SAN and tape devices running on the same HBAs. I would expect you would use 2 HBAs to connect to the SAN and 2 to connect to the tape drives. 2 cards have more than enough bandwidth to support the 4 LTO3 drives. Ben -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Stef Coene Sent: Tuesday, February 08, 2005 1:03 PM To: ADSM-L@VM.MARIST.EDU Subject: Number of HBA's Hi, For a setup with: - 4 x LTO3 drives in a IBM 3583 library - 1 oracle database server: 40GB/1hr archives that needs to backuped (AIX LPAR) over the SAN - 1 TSM server (AIX LPAR) What with the HBA's? Is it needed to split the tape and disk activity and to put 4 HBA's in the oracle DB (2 HBA's for disk activitiy and 2 for tape)? Idem for the TSM server. 2 HBA's or 4 HBA's? Stef ********************************************************************** 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. **********************************************************************
