>>>>> "ca" == Carsten Aulbert <carsten.aulb...@aei.mpg.de> writes: >>>>> "ls" == Lutz Schumann <presa...@storageconcepts.de> writes:
ca> X25-E drives and a converter from 3.5 to 2.5 inches. So far
ca> two systems have shown pretty bad instabilities with that.
instability after crashing or instability while running? Lutz
Schumann 2010-01-10 seemed to find the x25m g2 was ignoring sync cache
commands when its write cache was set to ``on'', but it did indeed do
uncached writing if you turn the write cache off for the whole drive
albeit at half the performance advertised in the spec sheet:
ls> Intel X25-M G2: - If I pull the power cable much data is lost,
ls> altought commited to the app (some hundred) - If I pull the
ls> sata cable no data is lost
ls> ST3500418AS: - If I pull the power cable almost no data is
ls> lost, but still the last write is lost (strange!) - If I pull
ls> the sata cable no data is lost
the test for it was to write a program that did 'write, sync, write,
sync' and notice when yaning x25m power connector with cache on <n>
transactions were lost, while yanking SATA connector 0 or 1
transactions were lost. Therefore I suspect the x25e which also lacks
a supercap might also be another deliberately broken to inflate specs
drive, and if it's instability after crashing you might try to disable
the x25e write cache (1/2 performance) and try again?
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