Messages in this thread |  | | | Date | Wed, 17 Apr 2002 23:47:13 -0700 (PDT) | | From | Andre Hedrick <> | | Subject | Re: IDE/raid performance |
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Already there ...
It is called "specific configuration". I will add support for it in 2.4 soon enough, once I have satatisfied it functionally works.
Cheers,
Andre Hedrick LAD Storage Consulting Group
On Wed, 17 Apr 2002, Mike Fedyk wrote:
> On Wed, Apr 17, 2002 at 01:47:16PM -0400, Kent Borg wrote: > > > > On Wed, Apr 17, 2002 at 10:27:22AM -0700, Jeff V. Merkey wrote: > > > From my analysis with 3Ware at 32 drive configurations, you really > > > need to power the drives from a separate power supply is you have > > > more than 16 devices. They really suck the power during initial > > > spinup. > > > > It seems an obvious help would be to have the option of spinning up > > the drives one at a time at 2-3 second intervals. I know a fast drive > > doesn't get up to speed in 3 seconds, but the nastiest draw is going > > to be over by then. > > > > A machine with 32 drives is pretty serious stuff and probably isn't > > booting in a few seconds anyway--another 60-some seconds might be a > > desirable option. > > > > Does this exist anywhere? Would it have to be a BIOS feature? > > I doubt it. > > All of the IDE drives I have used spin up when power is applied. Most of > the scsi (except for some really old ones) have a jumper that tells the > drive to wait until it receives a message from the scsi controller to spin up. > > I'd imagine that IDE would need some protocol spec changes before this could > be supported (at least a "spin the drive up" message...). > > Mike > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
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