I'm about to purchase an MD3000 and I'm looking for some feed back on the good the bad and the ugly.
I've read the Array tuning document that they have for the MD3000 and MD3000i. A lot of good info in there. Does anyone know if the active/active arrays do load balancing? I want to try and maximize the use of both RAID controllers. I'm wondering how well these work compared to a perc5e or 6e controller. If anyone has any experience with this I would love to get some feedback. The spec sheet identifies 512MB of cache. Is that enough for an enterprise level product?
Also, I'm trying to figure out which disk configuration will give me the best performance while trying maximize capacity. I want to try and keep cost down while still having a good data protection scheme. For a fully loaded array (15 Disks) I'm debating between the following configurations.
RAID 10 using 14 1TB SAS 7.2k RPM w/ HS
RAID 5 using 7 450GB SAS 15k RPM w/ HS
RAID 5 using 6 450GB SAS 15k RPM w/ HS
With the first option, I'm getting almost 2TB more and I'm hoping that performance won't be worse than using the RAID5 option. In addition, it's a less expensive solution.
Any storage experts with some thoughts on this?