Wow this has caused quite the stirrup! I think I'll leave them spinning :-) They are WD Raid Edition drives so I'll keep my fingers crossed. I just figured since the array does nothing like 21 hours of the day.. why not spin it down. But if spinup/downs are worse then I'll leave it be. The drive temps are 32-34 degrees since they have fans right on them and the case is nicely cooled. Thanks, Greg On Sun, May 4, 2008 at 8:04 PM, Bill Davidsen <davidsen@xxxxxxx> wrote: > berk walker wrote: > > > Bill Davidsen wrote: > > > > > Greg Cormier wrote: > > > > > > > Is it possible to sleep hard drives in an array? > > > > > > > > I have a HTPC at home that's on 24x7. It does all my torrenting as > > > > well, and is mainly a media server. > > > > > > > > Can I sleep the drives in my RAID5 array while it's not being used? > > > > It's an XFS partition. > > > > > > > > I have each drive set as > > > > > > > > hdparm -S240 /dev/sdX > > > > > > > > But I'm fairly sure they are not spinning down :( Is there some > > > > activity mdadm is doing in the background? > > > > > > > > These things are probably idle 22 hours of the day. > > > > > > > > > > > > > > I have several very similar systems, and I note that on one the disk > light blinks every five sec or so, while the others don't do that. The one > that blinks is the only one running LVM, all the others were partitioned by > hand. Does that apply to your system, LVM in use? > > > > > > > > Geez!! pardon me if I don't either "get it" or am unable to communicate > about "it". Those thinking that I'm un-necessarily repeating myself - email > your flames and I will be gone from here for a few months. > > > > Put / [and whatever ELSE that needs to be mounted] on a USB drive. I > recently got a 2Gb drive for pocket change!! > > > > Learn, or borrow someone who knows how - scripts. I don't think that you > would give a darn if a ram-drive didn't "spin-down". So PUT what can not be > put to sleep on something that doesn't have mechanical wear!!! > > > > Your system can be set up to WAKE up with everything mounted and ready to > go on ANY trigger/situation that YOU want - except the states need to be > either on or off... there are lots of states that newer 'puters monitor. > I'm sorry but THIS is not rocket science. > > > > NOW!! YOU FAILED TO RESPOND!! To my earlier response to you. Please > allow me to ax you again.... WHY do you want spin-down? HMMM > > > a - I didn't, the original poster did > b - his question was why it didn't spin down, so the WHY is irrelevant > c - none of the comments below are relevant to why his array won't spin > down > > > > Less noise- - buy new drives > > Less elect. co$t - If they aren't seeking, draw is LOW > > Less wear on the drives - I have never had a drive mfg respond > to my questions about this. My [totally personal] view on this > is if you're shutting down for a few hr., you will lose, > weeks will win. > > > > Rest of post snipped, also not related to why the array won't spin down. > The point about drive wear could be addresses by looking for studies of > same, it appears the bearing failures are related to POH, positioning errors > to total seeks, and electronic failures to power cycles. The data I have is > some years old, but I doubt that's changed, but it's not relevant to the > spin down issue. > > And no one seems to have answered to my query on use of LVM causing > frequest access. > > > > -- > Bill Davidsen <davidsen@xxxxxxx> > "Woe unto the statesman who makes war without a reason that will still > be valid when the war is over..." Otto von Bismark > > -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
