ADSM-L

AIX adapter placement

2004-01-27 09:09:08
Subject: AIX adapter placement
From: "Loon, E.J. van - SPLXM" <Eric-van.Loon AT KLM DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Tue, 27 Jan 2004 15:07:36 +0100
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


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