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Dell PE r710 w/ h700 running vsphere 5 with SSDs - What to expect

We recently purchased a dell r710 with a perc h700.  We installed 4 samsung 830 SSDs (MZ-7PC256B) in RAID 5

I have vmware vsphere 5 installed and have about 4 hosts running on the SSDs (SQL 2000, SQL 2008, Exhcange 2003, DC).

I have been reading that the lack of trim commands being able to be sent to the disks may cause a problem and also that the disks will eventually stop allowing writes.

My question(s) here are;
Is this a good idea to run in an enterprise environment providing backups are run regularly and can be restored in a an acceptable time frame?

AND More importantly;
What can i expect out of the SSDs when they start to fail?
Will the RAID controller recognize the failure (Im talking about the locked drive due to lack of trim command, i already know the raid controller will will let me know of a complete drive failure)?
Will there be a slow loss of performane or complete failure?


Thanks,
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Avatar of Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)
eventually with all SSD, they will prevent writes. But I'm sure you would have replaced them by then, how long do you intend to keep them? 3-5 years?

You should always have Backups, and a Disaster Recovery procedure to complete restores.

You can no longer write, and they become read only.
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So will the dell server front LCD indicate there is a problem.  My real concern is when they do start preventing writes, is there any indication or do i slowly develop data inconistencies and the server crashes weeks later.
You need to ensure you purchase compatible SSDs from Dell, which are supported, and have the correct firmware.

It's really early days for SSDs, and they've not been around long enopugh to stop working yet, with a Generation 1 SSD, and it's still working.
Please answer this question;

in my environment (VMware, running on Perc h700 with SSDs in RAID5) when the SSDs do start preventing writes, is there any indication or do i slowly develop data inconistencies and the server crashes weeks later.
SSD becomes read only. you will not be able to save to the SSDs.
What will the dell raid controller do when the SSDs become read only?  Will it mark the drive as failed?  Will it pass over the read only part write to another part of the drive?
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As far as I know, Intel ssd supports trim on raid 0 ONLY.
Without trim, but with garbage collection, I'm also wondering if it's still good choice to do raid 1 or 5 redundancy. I spent hots of hours through days, can't find answer online, even from Intel. They just want to sell as much as they can with single sentence 'TRIM is supported in RAID 0'