I have few of these exapnders:
HPE 12G SAS Expander Card (QuickSpecs/c04346272.pdf)
And they are not so cooperative (expander dropouts for a second every 10-30 seconds) with IBM and/or LSI 12GB/s RAID controllers. Expander seems to work better if speed is manually lowered to 6GB/s and raised back to 12GB/s thru MSM, and then things start to work as they should. Expander and controllers are on the most recent firmwares I found.
(( However, expander behaves properly with 6 GB/s HBAs (but in that case speed is negotiated immediately to 6GB/s so I don't know if this proves anything))
Can you guys share your experiences with this Expander here, I'd like to know which problems you have, and how you solve them.... I am bit lost about what's wrong.
PS: I didn't see appropriate thread for this topic, so I created one, sorry if this was inappropriate, admins feel free to move/merge if necessary.
HPE 12G SAS Expander Card (QuickSpecs/c04346272.pdf)
And they are not so cooperative (expander dropouts for a second every 10-30 seconds) with IBM and/or LSI 12GB/s RAID controllers. Expander seems to work better if speed is manually lowered to 6GB/s and raised back to 12GB/s thru MSM, and then things start to work as they should. Expander and controllers are on the most recent firmwares I found.
(( However, expander behaves properly with 6 GB/s HBAs (but in that case speed is negotiated immediately to 6GB/s so I don't know if this proves anything))
Can you guys share your experiences with this Expander here, I'd like to know which problems you have, and how you solve them.... I am bit lost about what's wrong.
PS: I didn't see appropriate thread for this topic, so I created one, sorry if this was inappropriate, admins feel free to move/merge if necessary.
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