We have a remote site running Exchange 2007 in SCC - Active/Active/Passive on Windows 2008 Server. The environment was sized for about 1500 users and we worked with vendors on SAN disk configuration etc. We're now going to deploy BES there to keep them inline with company policy. I understand there will be an increase in IOPS - roughly about 4 times the IOPS for each user we BES-enable. We haven't gone into the details, so this question is more hypothetical really, but is the solution to increased IOPS more disks in the SAN array? What if the array has no more space for disks? Is there anything else I can do? Secondly, what would we expect if we didn't take any action to deal with the increased IOPS needed? Slow Exchange servers?

Which version of BES? If you are deploying BES 5.02 then the hit has significantly decreased. It is is closer to 1:1 now, rather then 4x which is old information with the older versions. If you aren't deploying BES 5.02 then you would need a good reason on a fresh deployment! Simon.Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me.

The best thing for you will be to take the sizing calculator you did when you initially sized the solution and edit it to change one (or more?) of the profiles to put an IOPS multiplier in. For BES5 were working on 2.3 as a multiplier so thats essentially the user, (1), his BB (1) and a bit (.3) because, as Simon says, its more like 1:1 but isnt quite. Remember the 2.3 / 2.4 number is a MULTIPLIER and is not a number of IOPS per user. If the user came out at 0.4 then with the BB youre looking at about 1.0, not 2.3 + 0.4 (i.e. 2.7 or thereabouts) RIM have best practices for all their BES versions. Use those numbers and if you need to, call them to get the most current advice. Look at the number of active data disks in your array. Assume about 160 IOPS for 15K SAS/FC, 120 for 10K and 60 for 7.2 (SATA). If you took no action you would see increased read/write latencies. Exchange will get a sad if you push it over 20ms, but it wont totally break. "Chuck_P2101" wrote in message news:05c3d604-fac7-4771-8252-157b49e0b606... We have a remote site running Exchange 2007 in SCC - Active/Active/Passive on Windows 2008 Server. The environment was sized for about 1500 users and we worked with vendors on SAN disk configuration etc. We're now going to deploy BES there to keep them inline with company policy. I understand there will be an increase in IOPS - roughly about 4 times the IOPS for each user we BES-enable. We haven't gone into the details, so this question is more hypothetical really, but is the solution to increased IOPS more disks in the SAN array? What if the array has no more space for disks? Is there anything else I can do? Secondly, what would we expect if we didn't take any action to deal with the increased IOPS needed? Slow Exchange servers? Mark Arnold, Exchange MVP.