On Thu, 2013-01-03 at 01:26 -0800, Walter Bright wrote: […] > This is incorrect. Google SSD TRIM for why. The short version is yes, SSD > drives > will work without TRIM, but will run slowly. Operating system TRIM support is > necessary for fast SSD operation. TRIM is how the operating system tells the > SSD > drive that certain blocks no longer contain useful data, and can be recycled. > > The normal non-TRIM behavior is the only way the drive finds out that blocks > are > no longer used is when a write is issued for them.
This is what you get for backward compatibility, i.e. using flash on the same IO device and device driver as was designed for rotating rust hardware. SSD is just a whole hacky thing and instead the motherboards and OSes should evolve to allow the flash to be seen as a memory extension – which is what we were doing in 2004 very successfully with embedded systems. The very existence of TRIM indicates a systemic problem. -- Russel. ============================================================================= Dr Russel Winder t: +44 20 7585 2200 voip: sip:russel.win...@ekiga.net 41 Buckmaster Road m: +44 7770 465 077 xmpp: rus...@winder.org.uk London SW11 1EN, UK w: www.russel.org.uk skype: russel_winder
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