SSD jako systémový disk pro PC

[LM]

In addition to the SandForce-specific uses of spare area, all SSDs use it for three purposes: 1) read-modify-writes, 2) wear leveling and 3) bad block replacement.

Prakticky by to nemelo mit vliv viz uz drive odkazovany The Impact of Spare Area on SandForce, More Capacity At No Performance Loss?
More spare area can provide for a longer lasting drive, but the best way to measure its impact is to look at performance (lower write amplification leads to lower wear which ultimately leads to a longer lifespan). SandForce's controllers are dynamic: they'll use all free (untouched or TRIMed) space on the drive as spare area.

=> Pokud nebudes mit disk plny dat ktera nejdou komprimovat, disk nebude zaplnen na 100% a bude zapnuty TRIM tak by nemel byt problem.

anandtech.com:
Within the company we have 5 SandForce drives deployed in real, every day systems. The longest of which has been running, without TRIM, for the past eight months at between 90 and 100% of its capacity. In this particular drive the user (who happened to be me) wrote 1900GB to the drive (roughly 7.7GB per day over 8 months) and the SF-1200 controller in turn threw away 800GB and only wrote 1100GB to the flash. This includes garbage collection and all of the internal management stuff the controller does. Over this period of time I used only 10 cycles of flash (it was a 120GB drive) out of a minimum of 3000 available p/e cycles. In eight months I only used 1/300th of the lifespan of the drive.

Zajimave info je i zde Understanding SF1200 drives, TRIM, OP area use and Life write throttle