Put HDD to sleep with SSD

Hello,
I have a question for SSD users. I have a late 2008 unibody macbook pro. I just installed effortlessly an OCZ vertex 2 120gb ssd. Love the speed! I read around the internet that you should not check put hdds to sleep under energy saver for ssds. Is this true? My question would be the following:
I also heard that OCZ has some garbage collection algorythm that makes up for Mac's lack of TRIM support. If I put hdds to sleep when possible does it mean that the garbage collection will not work? What is the advantage of NOT putting hdds to sleep with SSD?
Finally, I am planning to install a second hd instead of my superdrive, a normal hd that is (seagate xt 7200). I suppose that having it means I should put the hdds to sleep when possible, am I right?
In case I should not put to sleep the ssd, can I select two different settings for the two different drives?
Sorry if this sounds confusionary, it sounded a lot better in my mind...
Thanks for any tips!

I also heard that OCZ has some garbage collection algorythm that makes up for Mac's lack of TRIM support.
I dont think garbage collection (and over provisioning) makes up for lack of TRIM support, but certainly helps it in that direction.
If I put hdds to sleep when possible does it mean that the garbage collection will not work? What is the advantage of NOT putting hdds to sleep with SSD?
I think you are asking - "If I put ssds to sleep when possible does it mean that the garbage collection will not work?", since hdds don't have the garbage collection.
Well, from (http://www.ocztechnology.com/aboutocz/news/151) and (http://www.enterprisestorageforum.com/technology/features/article.php/3850436) it seems that, according to OCZ's Chang, some of their ssds use idle time garbage collection. If yours came with a spec manual, I would look there.
The way Chang puts it is:
+OCZ's goal is to keep SSD performance at peak levels over the drive's lifespan. OCZ, he said, uses two basic garbage collection methods: incorporating the maintenance within firmware, and providing user-initiated tools to accomplish the same task. OCZ provides three different garbage collection methods, said Chang.Some OCZ drives feature idle-time garbage collection in the firmware, including PCI-Express and high-capacity 3.5-inch SSDs, which aim for high-performance endurance. OCZ's mainstream 2.5-inch SSD solutions ship with TRIM support, which is enabled on Windows 7 and various Linux versions.+
+For users who prefer Windows XP or Vista, OCZ provides a manual garbage collection tool that can be initiated at the user's discretion, said Chang, noting that the company also provides a garbage collection upgrade firmware for XP and Vista systems. "Garbage collection is just one more tool in OCZ's feature sets that helps sustain the revolutionary performance of SSDs over the long term," said Chang.+
So, if yours uses the idle time, it may need not benefit from a nap, although I can not find anywhere that suggest how long idle time is.
I find the whole OCZ presentation rather sloppy. I am sure they have good drives, but after reading on OCZ, it makes me want to take a nap.
Message was edited by: aprouser

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Message was edited by: sfandtheworld

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Message was edited by: John Kitchen - added postscript

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