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Hi,
We are going to migrate / replace our existing CX3-20 SAN to a CX4-240. We are currently using DAE3P Enclosure.
However, the vendor persuades us to replace the DAE3P Enclosure with DAE4P by stating that "It will not be capable of being upgraded to FC8 due to the DAE OS (FLARE OS) as it was the original FC4 DAE OS from the CX3-20".
From my previous postings, fellows have advised that the backend is still running 4Gbps while the front end is running 8Gbps. Does the saying from vendor is valid ? If yes, does it mean the backend will be upgraded from 4Gbps to 8Gbps in the future ?
Moreover, what is the difference between DAE4P and DAE3P ?
Thanking you in anticipation.
Message was edited by: TonyJK
Dear Parks,
We have talked to them but they insist that they are different. Is there any way for us to find out the part number ?
Besides, will there be any possiblity that DAE4P be upgraded to backend of 8Gbps. Anyhow, even the answer is YES, I think the backend of CX4-240 has to be upgraded as well.
Thanks again
The DAE3P and DAE4P are both 4 Gb/s Fibre Channel enclosures. Both the CLARiiON CX3 and CX4 series have the same 4 Gb/s Fibre Channel 'back end'. It cannot be upgraded to 8 Gb/s. The CLARiiON's internal, in most cases multiple back-end Fibre Channel buses should not be confused with the external Fibre Channel front-end interface.
The DAE4P is shipped with the CX4-series and has some minor hardware differences from the DAE3P. I believe the major difference is a revision of the enclosure's LCC which does not affect performance over the DAE3P.
The CLARiiON's backend buses, and the general architecture of a DAE are discussed in the 'DAEs and storage' and 'Drives and buses' sections of the EMC CLARiiON Storage System Fundamentals for Performance and Availability. This document is available on Powerlink.
weiw1
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Posted September 16th, 2010 00:00
Actually DAE3P/DAE4P is the same enclosure. It's the UltraPoint 4Gb DAE running at 4Gb/sec backend speed.
Your performance won't be downgraded.
Thanks.