> K matau, tai tiek red, tiek blue duoda 2 met garantij. Bet ar a neteisus manydamas, kad tokio disko apkrovimas bus tikrai 
> labai minimalus -  j bus raoma tik por valand per dien, ti gal px ta garantija? Beje, blue 4gb u visai nedaug brangiau, nei 
> green 3gb.


Yra sioks toks parametras, kuris tipo turetu kazkiek patikimuma nusakyti..
WD Red tas parametras (MTBF) yra 1 milijonas, WD Blue - neraso..
Tipo patikimesniuose dar eina ir sitas - Klaid lygis nuskaitymo metu
1:10E15, kai praktiskai daugelyje kitu - 1:10E14

Tame kainu lygyje kur dairaisi - pakankamai normalu paimti 3TB Red'a..

http://www.skytech.lt/0f14688-hdd-sata-4tb-7200rpm-6gbs64mb-a7k4000-0f14688-hgst-p-149688.html#tabsnav-1
220Eur uz 4TB, kur tipo 2,0 MTBF'as

https://www.hgst.com/sites/default/files/resources/US7K4000_ds.pdf
Reliability:
Error rate (non-recoverable, bits read) 1 in 10^15
Load/Unload cycles (at 40 C) 600,000
Availability (hrs/day x days/wk) 24x7
MTBF1 (M hours) 2.0
Annualized Failure Rate1 (AFR) 0.44%
Warranty (yrs) 5

Notes: MTBF and AFR targets are based on a sample population and are
estimated by statistical measurements and acceleration algorithms
under median operating conditions. MTBF and AFR ratings do not
predict an individual drives reliability and do not constitute a warranty.