On Fri, 17 Jan 2014, Dan Williams wrote: > > The intention is that this will help on systems with more than one > > disk drive. The one containing the core OS files and the journal will > > certainly spin up right away, but the others may not. > > > > To tell the truth, I'm not sure how useful this feature would be to > > most people. But there probably are a few, like Phillip, who will be > > glad to have it. That seems like sufficient justification for adding > > it. > > > > Hmm, given that an ATA "start" command is just a "read verify" I > wonder if this can be done more simply than tying runtime and system > resume together. Could the lazy resume knob simply cause sd_resume to > be skipped? The first real command that comes down will achieve the > same effect.
That might work for ATA disks, but it wouldn't work for other sorts. SCSI disks need to be spun up explicitly before they get a READ command. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
