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
