This post is more than 5 years old
252 Posts
0
1369
Migrating from CX300 to CX3-40c - question about existing DAE's
I am getting ready to migrate from a CX300 to a CX3-40c in February.
The CX300 has a DAE2p (300GB 10k FC 2Gbps) and a DAE2 (500GB SATA).
Can I use these in addition to the DAE4p's that I am purchasing with the CX3-40c?
What is the downside? Will I lose my 4Gbps speed on my new SAN?
I hate for the arrays to go to waste since I purchased them within the last 18 months.
The CX300 has a DAE2p (300GB 10k FC 2Gbps) and a DAE2 (500GB SATA).
Can I use these in addition to the DAE4p's that I am purchasing with the CX3-40c?
What is the downside? Will I lose my 4Gbps speed on my new SAN?
I hate for the arrays to go to waste since I purchased them within the last 18 months.
Allen Ward
2.1K Posts
0
December 4th, 2007 08:00
If you can't afford an outage then you will have to do some kind of data migration from frame to frame, otherwise you should seriously look at the upgrade in place option. None of your existing drives have to change and none of your data is touched.
One thing you do have to look out for though is if you use space on the first 5 drive to assign to hosts. You will require some additional space on these drives for the FLARE. If they are full now you will have to migrate something off. I can't tell you exactly how much additional space is required (although it is minimal) but your Dell/EMC folks should be able to give you details.
Allen Ward
2.1K Posts
1
November 29th, 2007 11:00
Were you aware that you could do an inplace upgrade?
The DAEs should be reusable, but you just need to be aware that any back end bus you plug one of the old DAEs into will be forced down to 2GB. You could always keep one 2GB bus and one 4GB (if I remember correctly the CX3-40 only has two back end busses). You would just need to make sure they configure your new array initially only using one bus so you can add your old DAEs to the other one.
We actually did this with a CX500 which we upgraded in place to a CX3-80. We now have the original two backend busses running at 2GB and the two new backend busses running the higher performance stuff at 4GB.
DGM3
238 Posts
0
December 2nd, 2007 23:00
The CX3-40c has two backend busses, while the CX3-40f has four backend busses.
The 'c' variant supports both iSCSI and Fibre Channel host connectivity, while the 'f' variant supports only Fibre Channel host connectivity.
Regards,
DGM
RRR
1 Rookie
1 Rookie
•
5.7K Posts
0
December 4th, 2007 02:00
DeaconZ28-2015
252 Posts
0
December 4th, 2007 05:00
What is involved in the process?
DeaconZ28-2015
252 Posts
0
December 4th, 2007 05:00
http://www.dell.com/content/products/productdetails.aspx/pvaul_cx3-40?c=us&cs=555&l=en&s=biz
Front End Connectivity
Dell/EMC CX3-40f
8 Fibre Channel front end ports (4 per Storage Processor)
Dell/EMC CX3-40c
4 Fibre Channel and 8 iSCSI front end ports (6 per Storage Processor)
Back End Connectivity
Dell/EMC CX3-40f
4 Fibre Channel ports per Storage Processor
4 redundant back end loops per array
Dell/EMC CX3-40c
2 Fibre Channel ports per Storage Processor
2 redundant back end loops per array
RRR
1 Rookie
1 Rookie
•
5.7K Posts
0
December 4th, 2007 07:00
DeaconZ28-2015
252 Posts
0
December 4th, 2007 07:00
RRR
1 Rookie
1 Rookie
•
5.7K Posts
1
December 4th, 2007 07:00
Allen Ward
2.1K Posts
0
December 4th, 2007 08:00
The only other thing you have to think about on the upgrade (non technical consideration) is the cost of maintenance on an upgraded array as opposed to maintenance (with the new array warranty) on a replacement array.
Ignoring money I can tell you the inplace upgrade is worth the savings in time and effort.
DeaconZ28-2015
252 Posts
0
December 4th, 2007 08:00
And the first five drives in my current CX300 are not assigned to hosts.
Thank you both for your answers.
DeaconZ28-2015
252 Posts
0
December 4th, 2007 09:00
RRR
1 Rookie
1 Rookie
•
5.7K Posts
0
December 4th, 2007 09:00
Lucky for you, all space is still available !
DGM3
238 Posts
0
December 4th, 2007 19:00
like a CX700 or CX3-80 I guess.... I thought all
CX3-40's only had 2 busses.
The 'f' variant of the CX3-40, which provides 4 backends, became available after the initial introduction of the CX3-series. The data sheet on EMC.com notes both offerings (FC only, and FC/iSCSI);
http://www.emc.com/products/systems/clariion_cx3/pdf/C1147_ClariionCX3_40_SS_ldv.pdf
Regards,
DGM
RRR
1 Rookie
1 Rookie
•
5.7K Posts
0
December 5th, 2007 06:00