[Info-vax] VMS and the (lack of the) TRIM facility.

[Stephen Hoffman]

On 2015-06-20 09:28:45 +0000, Jan-Erik Soderholm said:

> Or is the TRIM command something that *must* be sent from the OS itself?

Once initially written and in the absence of TRIM, only the OS knows 
which blocks are still allocated or not, so unless the storage 
controller has knowledge of and is peering directly into the file 
system implementation details...


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