Possible to Mix 10k RPM SAS drives with 7k RPM SATA drives?

I have an old Dell Poweredge 1950 that for its age, is still fairly decent.  I would like to Frankenstein it as much as possible.  It has a Dell PERC 5i RAID controller and currently has 3 drives in RAID 5 (not something I setup).  These drives are 10k RPM SAS drives.  I would like to add more drives to it, but I do not have anymore 10k SAS drives, just a bunch of SATA 7200 RPM drives.  Can these be added to this RAID card, and used at the same time to create a new RAID array?  I am guessing no, but I thought I would inquire.

Thanks
CnicNVAsked:
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Lee W, MVPTechnology and Business Process AdvisorCommented:
I believe the drives have to be the same type (you COULD mix SAS 7.2K and SAS 10K, but you can't mix SATA and SAS on the same controller.

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Athar SyedCommented:
Agree with @Lee. Additionally, mixing with slower speed drives will reduce the speed of the faster drives as well. The 10K RPM will run at 7K, even if data is read or written only on the 7K at a lower level.
rindiCommented:
If you setup a separate array with the SATA disks it should work, but for the same array it won't work. What is very important is that you only use enterprise class disks that have been certified by Dell to work with that RAID controller and have the Dell firmware on them.
CnicNVAuthor Commented:
Ok, I thought as much, just wanted to have some feedback and confirmation.

Thanks
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