I would do the following:   For figuring out the number of spindles you may need, you can look here.  The I/Ops the drive can sustain are a little low in my opinion, but better to go low than to go too high.  Remember, always size performance / not space.  [URL]
 I am unable to submit collects to EMC and Dell is unable to resolve this problem.Does anyone know how to trouble shoot this problem? On Bus0 everything is FC's, Bus1 Enc0 is FC, b1e1 is fata with 687 gig@ 7200k, b1e2 is 458 gig @ 7200k and b1e3  0-7 are 458 gig [NAME] and 8-14 are 320 gig @ 5400k. All fata rg and luns are 1/0 4 drives and i am getting the following errors during backups d2d.  Time Stamp 11/28/10 17:03:19 Event Number 801 Severity Warning Host CX50x01_SPA Storage Array APM00042302479 SPA Device Bus 1 Enclosure 1 Disk 3 Description Soft SCSI Bus Error Customer Time Stamp 11/28/10 13:59:00 Event Number 801 Severity Warning Host CX50x01_SPA Storage Array APM00042302479 SPA Device Bus 1 Enclosure 1 Disk 1 Description Soft SCSI Bus Error Customer Time Stamp 11/28/10 10:04:21 Event Number 801 Severity Warning Host CX50x01_SPA Storage Array APM00042302479 SPA Device Bus 1 Enclosure 1 Disk 11 Description Soft SCSI Bus Error Customer Time Stamp 11/28/10 10:01:16 Event Number 801 Severity Warning Host CX50x01_SPB Storage Array APM00042302479 SPB Device Bus 1 Enclosure 2 Disk 8 Description Soft SCSI Bus Error Customer  Thanks
Event Number 801 Severity Warning Host CX50x01_SPB