Re: Disk write cache (Was: Hyper-Threading Vulnerability)

[Mark Lord]

>took place on another list, and wrote a test gizmo that copied a
>large file, then slept for 1 second and issued a sync command.  No
>drive led activity until the usual 5 second delay of the filesystem
>had expired.  To me, that indicated that the sync command was being

There's your clue.  The drive LEDs normally reflect activity
over the ATA bus (the cable!). If they're not on, then the drive
isn't receiving data/commands from the host.

Cheers
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