On May 23, 2016, at 8:41 AM, Wilfried Woeber <woeber@cc.univie.ac.at> wrote:
[...]
Has anyone tested how many writes are going on to the ATLAS thumb drive? Perhaps with all the failures within a year of start, perhaps too many writes are taking place?
I know that a very small number of probes is not a valid basis for statistics, but there wasn't a USB drive failure yet for the long-term, always-on probe.
But they are powered with dedicated, stable power sources. Thus I tend to lean more towards the explanation involving level or stability of power, rather than # of writes.
FWIW, Wilfried
Regards, Hank
Stable power, as from a UPS, also isolates the probe from power glitches which may cause rebooting of the probe, thus adding to the write count. Not to mention corruption from power failure during writes. Opinion: If the device/system/operation is at all important, use of a UPS is effectively mandatory. James R. Cutler James.cutler@consultant.com PGP keys at http://pgp.mit.edu