arik010
1 Nickel

dell r720xd cachecade support

hello i am planning to purchase 2 x samsung 840 ssd (120GB) for utilizing the cachecade feature on perc h800

        does anyone tried to use those disk and can confirm that they are supported?

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Dev Mgr
5 Rhenium

Re: dell r720xd cachecade support

For Cachecade you want to use an enterprise class SSD, which the Samsung's 840 series isn't.

I'd recommend to get something more along the lines of:

- Micron's RealSSD P400e series

- Intel's 710 series

- Seagate's Pulsar.2 series

Member since 2003

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arik010
1 Nickel

Re: dell r720xd cachecade support

if we use the samsung they wont be recognized by the controller?

their speed and specs seem be much better then those posted on the list

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Dev Mgr
5 Rhenium

Re: dell r720xd cachecade support

Well, any of these drives may or may not work. The only ones anyone can 'guarantee' to work are Dell SSDs.

That being said, you want a drive with a high durability, not just fast. SSDs have a limited write lifespan. For home use, most SSDs will last a decent amount of time, but Cachecade is going to be used heavily for writes most likely, which means that the write durability will play a big role. Desktop/laptop quality drives have a much lower write lifespan than enterprise class drives (it is not uncommon for an enterprise class drive to be able to do 10 times more in writes than a home-user class drive).

A 15k rpm SAS harddrive can typically do up to 200 IOPS. If you have an enterprise class SSD that does 10,000 IOPS, it may seem slow compared to a home-user class SSD that can do 90k IOPS, but it is still a huge performance boost from a 15k SAS drive.

Member since 2003

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