telika ayto to write caching ti akribws kanei?

[predator]

to anarwtiemai edw kai kairo.

apo de3i klik sto skliro meta properties kai hardware,epilegoume to skliro apo ti lista,me diplo aristero klik mpainoume sta properties tou.sti kartela policies exei mia epilogi "enable wrie caching on the disk"

ti akribws kanei ayto to rimadi?to exete tikarismeno h oxi?poia h diafora se apodosh?

[CyberWalker]

Αν και η κουβέντα με το θέμα που άνοιξες μπορεί να τραβήξει μακριά μια σύντομη απάντηση δίνεται παρακάτω :

 

"...

Write Caching Policy

-----------------------

There's a complication involved in caching write requests to the disk that doesn't exist when doing reads: should the write be cached (put into the disk's buffer) or forced to go through directly to the disk platters? If you don't cache the write you effectively remove the buffering that is in place to isolate the system from the slow mechanics of the drive. If you do cache the write you improve performance, but what happens to the write if the power is cut off to the disk before it can be put out to the platters? This is not a simple question, and doesn't have a simple answer; see here for a full discussion on the subject...."

 

"...It should be noted that write caching improves performance pretty much only in a random write environment: writing small blocks to the disk..."