iMac 27" mid2011 1TB+512SSD als intelligentes Laufwerk ... ist dumm

Als Einzelvolume auf Ihrem Mac verschiebt Fusion*Drive automatisch und dynamisch häufig verwendete Dateien zum schnelleren Zugriff auf einen Flashspeicher und selten verwendete Dateien auf die Festplatte. Dadurch können Sie von kürzeren Startzeiten profitieren; zudem werden Ihre Programme zunehmend schneller starten, und Sie werden schneller auf Dateien zugreifen können, je mehr das System erlernt, wie Sie arbeiten. Fusion*Drive verwaltet all dies automatisch im Hintergrund.

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mrswitters wrote:

Basalite wrote:

It's a buffer, not a cache. For photo work you are not going to slow down the Fusion Drive for frequently used files..

This is another thing that confuses me when it comes to the Fusion drive and photography work. Many photos I work on will not be "frequently used". For example, I take some pictures of my daughter, import them into LR, then start working on them. Since they're brand new files, they'll be stored on the HDD and will thus not benefit from the SSD speeds of the Fusion drive, correct?

No.

From the Anandtech site (probably the most respected tech site in the industry)

"Fusion Drive ..... prioritizes the SSD for all incoming writes. If you don’t fill the Fusion Drive up, you can write tons of data to the drive and it’ll all hit the SSD. If you do fill the drive up and test with a dataset < 4GB, then you’ll once again just measure SSD performance."

So basically what it's saying is that until it sees a reason to move the files to the HDD side of the Fusion Drive those files you just copied will, within the size and conditions mentioned, will always go to the SSD.

Re: storage. There's no question I'll need external storage eventually. My idea was that with 650 GB of photos and 250 GB of other data (OS, apps, video, previews, etc.), a 3 TB Fusion drive would probably last me another 2 years at least. (I'm very busy at work and not taking as many pictures as I used to.) At that time I could get a TB RAID and move all of my photos to that drive, and just use the 3 TB Fusion for OS, apps, previews and ACR cache.

The OS will always reside on the SSD side of the Fusion Drive but apps can be moved, partly or totally to the hard drive side, depending on your use. All other files is also depending on your use. It's not something you can decide.

If I choose this route, I'll not only save $$ on the 3 TB Fusion vs. 512 GB/1 TB flash, I'll avoid having to purchase a RAID ($500 for a LaCie 2big) for my photos.

Why would you need to have that? You have to compare like for like as much as possible. After all, the equivalent to the hard drive side of the 3TB Fusion Drive is an inexpensive 7200 RPM 3TB hard drive. You could go with the 512GB SSD and a 3TB USB 3 drive. That would give you twice the SSD write speed of the Fusion Drive but then you would have to manage the transfer of files to the external 3TB USB 3 drive. Going down that route the only advantage is the SSD write speed increase but it would be far cheaper than "512 GB/1 TB flash."

I guess in the future if I decide the Fusion isn't fast enough I can get an additional RAID and put a couple of fast SSDs in RAID 0 configuration and use that as the boot drive for OS and apps, and maybe use the internal Fusion drive for Time Machine/Backup or something else.

There is also supposedly a way to separate (software wise) the SSD and the HDD of the Fusion to allow them to be seen and work independently. That could be an option for the future in addition to a faster external SSD setup.

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wazzup schrieb:

Fusion drive selbstgebastelt und das soll funzen? Ich hatte in meinem alten 2011er auch ne ssd und eine hdd, aber das war eben kein fusiondrive.
Ich würde vorschlagen schmeiss die olle hdd raus und bau dafür eine 1tb evo ein. Kostet ja quasi nichts mehr.

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