3584 amd SDG R03
HiWe 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 RegardsDaniel Sparrman
Re: 3584 amd SDG R03
How long are the SCSI Cables, are you sure the termination is ok. Might be a bad cable. Differential SCSI is really picky. -Original Message- From: Daniel Sparrman [mailto:[EMAIL PROTECTED]] Sent: Monday, February 11, 2002 12:58 AM 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
Re: 3584 amd SDG R03
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. **
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 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= | Arnaud Brion, Panalpina Management Ltd., IT Group | | Viaduktstrasse 42, P.O. Box, 4002 Basel - Switzerland | | Phone: +41 61 226 19 78 / Fax: +41 61 226 17 01 | =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= -Original Message- From: Loon, E.J. van - SPLXM [mailto:[EMAIL PROTECTED]] Sent: Monday, 11 February, 2002 10:34 To: [EMAIL PROTECTED] Subject: Re: 3584 amd SDG R03 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. **
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 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= | Arnaud Brion, Panalpina Management Ltd., IT Group | | Viaduktstrasse 42, P.O. Box, 4002 Basel - Switzerland | | Phone: +41 61 226 19 78 / Fax: +41 61 226 17 01 | =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= -Original Message- From: Loon, E.J. van - SPLXM [mailto:[EMAIL PROTECTED]] Sent: Monday, 11 February, 2002 10:34 To: [EMAIL PROTECTED] Subject: Re: 3584 amd SDG R03 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. **
Re: 3584 amd SDG R03
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 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= | Arnaud Brion, Panalpina Management Ltd., IT Group | | Viaduktstrasse 42, P.O. Box, 4002 Basel - Switzerland | | Phone: +41 61 226 19 78 / Fax: +41 61 226 17 01 | =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Confidentiality Notice The content of this e-mail is intended only for the confidential use of the person(s) to whom it is addressed. If the reader of this message is not such a person, you are hereby notified that you have received this communication in error and that reading it, copying it, or in any way disseminating its content to any other person, is strictly prohibited. If you have received this message in error, please notify the author by replying to his e-mail immediately.
Re: 3584 amd SDG R03
Hi Tab! Is that compressed? I spoke about native, so uncompressed. Kindest regards, Eric van Loon KLM Royal Dutch Airlines -Original Message- From: Tab Trepagnier [mailto:[EMAIL PROTECTED]] Sent: Monday, February 11, 2002 23:14 To: [EMAIL PROTECTED] Subject: Re: 3584 amd SDG R03 Eric, Our 3583 uses HVDS drives and we see peak rates of over 12 MB/s per drive as reported by topas. Tab Trepagnier TSM Administrator Laitram Corporation "Loon, E.J. van - SPLXM" <[EMAIL PROTECTED]>@VM.MARIST.EDU> on 02/11/2002 03:33:50 AM Please respond to "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] cc: Subject: Re: 3584 amd SDG R03 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. **
Re: 3584 amd SDG R03
Eric, That with "drive compression" turned on - device class format = drive. That number comes from "topas" which is measuring OS activity and reports physical bytes, not TSM's logical bytes. Thanks. Tab "Loon, E.J. van - SPLXM" <[EMAIL PROTECTED]>@VM.MARIST.EDU> on 02/12/2002 03:06:18 AM Please respond to "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] cc: Subject: Re: 3584 amd SDG R03 Hi Tab! Is that compressed? I spoke about native, so uncompressed. Kindest regards, Eric van Loon KLM Royal Dutch Airlines -Original Message- From: Tab Trepagnier [mailto:[EMAIL PROTECTED]] Sent: Monday, February 11, 2002 23:14 To: [EMAIL PROTECTED] Subject: Re: 3584 amd SDG R03 Eric, Our 3583 uses HVDS drives and we see peak rates of over 12 MB/s per drive as reported by topas. Tab Trepagnier TSM Administrator Laitram Corporation "Loon, E.J. van - SPLXM" <[EMAIL PROTECTED]>@VM.MARIST.EDU> on 02/11/2002 03:33:50 AM Please respond to "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] cc: Subject: Re: 3584 amd SDG R03 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. **
Re: 3584 amd SDG R03
How do use "topas" to report on Tape drive throughput? I have topas on AIX 4.3.3 ML9 and TSM server 4.2.1.9 and IBM 3584 library through McData switches. David Longo >>> [EMAIL PROTECTED] 02/13/02 07:13PM >>> Eric, That with "drive compression" turned on - device class format = drive. That number comes from "topas" which is measuring OS activity and reports physical bytes, not TSM's logical bytes. Thanks. Tab "Loon, E.J. van - SPLXM" <[EMAIL PROTECTED]>@VM.MARIST.EDU> on 02/12/2002 03:06:18 AM Please respond to "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] cc: Subject: Re: 3584 amd SDG R03 Hi Tab! Is that compressed? I spoke about native, so uncompressed. Kindest regards, Eric van Loon KLM Royal Dutch Airlines -Original Message- From: Tab Trepagnier [mailto:[EMAIL PROTECTED]] Sent: Monday, February 11, 2002 23:14 To: [EMAIL PROTECTED] Subject: Re: 3584 amd SDG R03 Eric, Our 3583 uses HVDS drives and we see peak rates of over 12 MB/s per drive as reported by topas. Tab Trepagnier TSM Administrator Laitram Corporation "Loon, E.J. van - SPLXM" <[EMAIL PROTECTED]>@VM.MARIST.EDU> on 02/11/2002 03:33:50 AM Please respond to "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] cc: Subject: Re: 3584 amd SDG R03 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. ** "MMS " made the following annotations on 02/13/02 19:44:55 -- This message is for the named person's use only. It may contain confidential, proprietary, or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it, and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. Health First reserves the right to monitor all e-mail communications through its networks. Any views or opinions expressed in this message are solely those of the individual sender, except (1) where the message states such views or opinions are on behalf of a particular entity; and (2) the sender is authorized by the entity to give such views or opinions. ==
Re: 3584 amd SDG R03
David, Check the FILE/TTY Readch and Writech numbers while only one drive is active on the system. Our system is small enough that we get that one-drive-active condition. Thanks. Tab David Longo <[EMAIL PROTECTED]>@VM.MARIST.EDU> on 02/13/2002 06:31:54 PM Please respond to "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] cc: Subject: Re: 3584 amd SDG R03 How do use "topas" to report on Tape drive throughput? I have topas on AIX 4.3.3 ML9 and TSM server 4.2.1.9 and IBM 3584 library through McData switches. David Longo >>> [EMAIL PROTECTED] 02/13/02 07:13PM >>> Eric, That with "drive compression" turned on - device class format = drive. That number comes from "topas" which is measuring OS activity and reports physical bytes, not TSM's logical bytes. Thanks. Tab "Loon, E.J. van - SPLXM" <[EMAIL PROTECTED]>@VM.MARIST.EDU> on 02/12/2002 03:06:18 AM Please respond to "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] cc: Subject: Re: 3584 amd SDG R03 Hi Tab! Is that compressed? I spoke about native, so uncompressed. Kindest regards, Eric van Loon KLM Royal Dutch Airlines -----Original Message- From: Tab Trepagnier [mailto:[EMAIL PROTECTED]] Sent: Monday, February 11, 2002 23:14 To: [EMAIL PROTECTED] Subject: Re: 3584 amd SDG R03 Eric, Our 3583 uses HVDS drives and we see peak rates of over 12 MB/s per drive as reported by topas. Tab Trepagnier TSM Administrator Laitram Corporation "Loon, E.J. van - SPLXM" <[EMAIL PROTECTED]>@VM.MARIST.EDU> on 02/11/2002 03:33:50 AM Please respond to "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] cc: Subject: Re: 3584 amd SDG R03 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. ** "MMS " made the following annotations on 02/13/02 19:44:55 -- This message is for the named person's use only. It may contain confidential, proprietary, or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard cop
