Sorry I am slightly OT
If I disconnect the SATA / SAS cable, or I suddenly power off the
computer with the controller (this can be done if the drive is on a JBOD
chassis with separate power) will the HDD/SSD go ahead flushing all
write-cache content to the platters / flash media? (and so I would get a
consistent filesystem/database on power on)
Or will it get mad when it returns completion for each write command and
nobody is listening on the other end of the cable? (cable disconnected
or controller powered off)
Now another question:
When the drive is doing cached writes (cache on), without NCQ
(queue_depth at 1), is the "completion" returned immediately upon
receiving the write command, or is it returned later when the data goes
to the platters? If it's the latter, what is the difference with NCQ
(queue_depth > 1) then?
Thank you
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