Hi Andy! Thank you for your reply! I guess I will go for the option of sharing the same bus for SSA and SCSI, except I will use the SCSI adapter with one SCSI chain. The double paired SCSI adapter I will put in the FC adapter bus. Kindest regards, Eric van Loon KLM Royal Dutch Airlines
-----Original Message----- From: Wilcox, Andy [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 27, 2004 18:09 To: [EMAIL PROTECTED] Subject: Re: AIX adapter placement Hiya Eric, Just checked out the link to see the differences for myself. Something that is in your favour is that slots 5 and 7 are also 64-bit. This about the only thing the 11 Edition and 2? edition agree on!!! This is where my query on your network ustilisation comes from. Slots 1 & 2 are 33/50MHz slots which could provide bandwidth advantages should you really throw the data at your GB ethernet interface. If you are not throttling the GbE, you can always ignore the suggestion of leaving slot 2 free. In an ideal world you need to have your tape interfaces on different buses (which you have suggested) and it wouldn't hurt to keep your network away from the tapes and disks as well (again which you have done). I suppose the big question is what you rely on more, is it: 1)network->disk, 2)network->tape, or 3)disk->tape throughput. I would have said your configuration is ideal for the first two and not so much for the third, but in all honesty I have never known disk->tape migrations to utilise the sort of bandwith you will have available anyway. If I were in your shoes, and after looking at the revised placement guide I would have to go with something pretty similar to what you have suggested too. Hope this helps. Andy Wilcox UNIX Systems Administrator Aquila Networks -----Original Message----- From: Loon, E.J. van - SPLXM [mailto:[EMAIL PROTECTED] Sent: 27 January 2004 16:11 To: [EMAIL PROTECTED] Subject: Re: AIX adapter placement Hi Andy! The 2969 Ethernet adapter is a 64-bit adapter and slot 1 and 2 are the only 64-bit slots in a H70. The manual I used is SA38-0538-23 (http://publib16.boulder.ibm.com/pseries/en_US/infocenter/base/hardware_docs /pdf/380538.pdf) which I assume is the 23rd edition... I have 6 LTO1 drives which are daisy-chained in pairs. The 6203 adapter has two SCSI connectors, so drive 1 and 2 are daisy-chained to connector 1 of card 1, drive 3 and 4 are daisy-chained to connector 2 of card 1 and drive 5 and 6 are daisy-chained to connector 1 of card 2. Kindest regards, Eric van Loon KLM Royal Dutch Airlines -----Original Message----- From: Wilcox, Andy [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 27, 2004 16:32 To: [EMAIL PROTECTED] Subject: Re: AIX adapter placement Always a pig this one but in terms of number of buses the H70 only has one PCI bus according to the 11th edition of the adapter Placement Guide, although I have worked with them in the past and I though there were two buses, with the at least the first two PCI slots on a different bus to the 6 remaining. If there is only bus though, then you don't really have much choice about "bunching" your SSA and SCSI adapters together, as it will make no difference where you put them. What I wouldn't mind knowing is how your 6 LTO drives are connected. I am guessing that you have 4 SCSI, with 2 attached to each SCSI adapter, and two FC drives off the FC adapter. Also it will be worth knowing what you Ethernet traffic is like in terms of volume. The reason I ask about this is (subject to my assumption of having two buses) where can you place the GbE card. According to my old 11th Ed. of the guide you can put the Ethernet card in IBM order of preference in slot 1, 5, then 2, followed by 7, so in essence you could put split your SCSI and SSA cards across busses. Many thanks Andy Wilcox UNIX Systems Administrator Aquila Networks -----Original Message----- From: Loon, E.J. van - SPLXM [mailto:[EMAIL PROTECTED] Sent: 27 January 2004 14:08 To: [EMAIL PROTECTED] Subject: AIX adapter placement Hi *SM-ers! Maybe this post is a little bit off-topic for some of you, if so: sorry... I have to reconfigure my H70 in the very near future. It's badly configured now (incorrectly placed adapters, incorrect SSA loops, too low on memory, etc.) which results in rather poor performance. The box will be equipped with the following adapters with their requirements (source: Adapter Placement Reference for AIX, SA38-0538-23): 1) Gigabit Ethernet adapter (FC 2969) (must be in slot 1, slot 2 empty if possible) 2) 2 SCSI adapters (FC 6203) (any slot) 3) 2 SSA adapters (FC 6215) (any slot) 4) Gigabit Fibre Channel Adapter (FC 6227) (must be in slot 3 or 4) I was thinking about the following layout: Slot 1: Gigabit Ethernet adapter Slot 2: empty Slot 3: Gigabit Fibre Channel Adapter Slot 4: empty Slot 5: SSA adapter 1 Slot 6: SCSI adapter 1 Slot 7: SSA adapter 2 Slot 8: SCSI adapter 2 I'm a little bit worried about the placement of the SSA and the SCSI adapters on one PCI bus. Will this cause a bottleneck (for instance, during migration from disk to tape (6 LTO drives in a 3584))? If so, do you suggest a better layout? Thank you very much in advance for your reply! Kindest regards, Eric van Loon KLM Royal Dutch Airlines ********************************************************************** 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. 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