On 10/26/11 01:01, james wrote: > Alex: > > > Provided that HDD has no capacitor enough to flash cache in case of > > power failure. As far as I know they typically have. > > That's news to me. What evidence do you have? Given the large size of > on-disk buffers these days, it would need to be pretty hefty as far as I > can see. And I don't recall seeing anything on the drives I bought > recently.
Probably I've missed some details. Capacitor present on HDD is really enough only for making sector's writes atomic. A solution with capacitor to save cache somewhere requires additional flash RAM - in that case not too big capacitor is enough to save write cache data to NVRAM. When power is back again, contents of the flash is will be stored on disk. ------------------------------------------------------------------------------ The demand for IT networking professionals continues to grow, and the demand for specialized networking skills is growing even more rapidly. Take a complimentary Learning@Cisco Self-Assessment and learn about Cisco certifications, training, and career opportunities. http://p.sf.net/sfu/cisco-dev2dev Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
