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All the details aren't out yet, so we can't be certain what is or isn't Fusion Drive. However, the speculation is that Fusion drive is more than merely a union
by perishabledave 14y ago
All the details aren't out yet, so we can't be certain what is or isn't Fusion Drive. However, the speculation is that Fusion drive is more than merely a union of two disks, but with an OS level automatic tiering. (http://arstechnica.com/information-technology/2012/10/apple-fusion-drive-wait-what-how-does-this-work/ http://arstechnica.com/information-technology/2012/10/apple-...)
- 3JPLW 14y ago> with an OS level automatic tiering. Yes, exactly. And citing the source you provide, "This [OS level automatic tiering] is almost certainly done using Apple's Core Storage logical volume manager, introduced in OS X 10.7. As a volume manager, Core Storage has the chops to weld the two separate drives together into a single entity and handle the relocation of files between one tier and the other." So, then, if you can show that you can merge two disks with CoreStorage, and get it to tier them such that recently used apps and files get moved over to the SSD... what more details do you need? See also the promoted comment on that ARS page: "First off, I am 100% certain this is HFS+ sitting on top of CoreStorage based on comments made to me by by certain former coworkers who are still at Apple."
- toomuchtodo 14y agoSo, it's basically Linux's LVM.