Present System (see below at ) State:
Old SSD = ~60GB OCZ Vertex 2 (A) New SSD = ~120GB Samsung 830 (B), presently "overprovisioned" (for speed/longevity) leaving ~100GB effective available storage.
Win7 Pro 64-bit installation successfully cloned from A to B. Until [B contents>A capacity], A was used to Clone B (for speedy backup purposes).
Now, however, I have put in place alternative backup (RAID & NAS, as below)--since drive A contents (>65GB) no longer "fit" on drive B.
Drive A is now "clean" and available to extend the capacity of Drive B.
BUT HOW "BEST" (AND SAFEST) TO DO THAT??
Here's what I'm proposing to do now (pending advice) toward my subject goal:
Use the Disk Spanning facility of Win7's Disk Management utility more or less as follows--
RESERVE ("overprovision") ~40GB of the new 120GB Samsung, Drive B (i.e., by using Samsung's included utility), leaving ~80GB effective storage (i.e., as seen by the OS).
SPAN the overprovisioned ("shrunk" storage) Samsung 830, Drive B (as is, not reformatted--using Win7's Disk Management Utility) to "overflow" onto the older, smaller OCZ Vertex, Drive A. (i.e., Drive B remains as my C: drive).
Expected (desired) Results: New effective storage of ~80GB (at Samsung speed) + ~40GB (from conservatively used, not maxed out 60GB Vertex) = ~120GB TOTAL adequately buffered, long-lived SSD storage (i.e., about the effect I might have were I able to use the entire capacity of the newer 120GB Samsung 830 alone).
Drive A (slower, older, smaller OCZ) won't "kick in" or impose its speed penalties (prob. unnoticeable in use) until the (artificially but explicitly imposed) ~80GB capacity of the Samsung has been exceeded.
Editor and Reader comments, refinements, alternatives, caveats would be appreciated. Are my understandings correct? What have I gotten wrong?
N.B. While I'm aware of Win7's available explicit user control of mount points, junctions, etc., I do not want to edit the registry or do a fresh install of Windows to accomplish redirection of directories, large files, etc. for the purpose of using both SSDs to enlarge my effective storage pool and optimize efficiency/longevity of the SSD hardware.
*Environment: i7-920, 3.2GHz OC on Gigabyte GA-X58A-UD5 (flashed to F7 BIOS).
Cooler Master Hyper 212 w. 2 PWM Fans (Akasa "Apache" 120mm) mounted.
12GB (6x2) CL6 DDR3 @ 1600 & 1.5V
Win 7 Pro, 64-bit MSI 5770 Radeon "HAWK" on PCIEXx16(2) Sapphire 7750 Radeon on PCIEXx16(1)4 1TB 7200 Hitachi HDs providing 3TB on ext. USB 3 Raid. 1TB NAS HD.
(Occasionally--Win8 Preview or Ubuntu latest LTS as Guest OS under VMWare Workstation on Win7, as above.)