Image may be NSFW.
Clik here to view.
I’m trying to figure out what the read cache part of the following message refers to:
[sda] Write cache: enabled, read cache: enabled, doesn’t support DPO
or FUA
Is it “IDE drive’s read-lookahead feature (usually ON by default)” as treated by hdparm?
If it’s not, how can this be turned off?
Image may be NSFW.
Clik here to view.
Well, I’ve found out proper tool to control this cache: sdparm.
It looks like as not having any relation to read-ahead cache. Also, seemingly rare SATA drive is able to unset this bit.
Check more discussion of this question.
