Constant hard drive spin

Hello,
Over the past two days, I've begun my MBP has been spinning the hard drive constantly. This has not happened previously. At first I thought it was the processor cooling fan that was always on, buut after reading these boards, I found that it was in fact the hard disk. Is it normal for the disk to always spin, it seems as though that would adversly effect batterylife.
Any input would be appreciated.
MBP: 183ghz 1gb Mac OS X (10.4.6)

You should take a look at your software installation log, and see if you've installed anything on your machine around the time this began happening. You may also want to compare this to how you've been using the machine recently. Certain applications (torrent file transfer, music playback, debug logs to name a couple) will keep the disk spinning, regardless of your power saving features because disk access is required.
If you open up the activity monitor, you may want to check and see if you've got any particular application hitting the disk -- do you for example have this issue even when you haven't launched any apps?
Golan.

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Hi David
Welcome to Apple Discussions
1. In the Energy Saver preference try setting Computer sleep: to "Never" and make sure the the box "Put the hard disk(s) to sleep when possible" is unchecked.
2. Try resetting the System Management Controller as described in the article below.
http://support.apple.com/kb/HT1543
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Hello all,
New to Apple and to the Apple Discussion boards. Looks like a great resource for information. Now my question:
I've had my black MacBook for a little over a week now. Today while using it to do some word processing with Word, I noticed that the whole time I was using the notebook there was a constant low vibration across the whole surface where the keys and palms rest. I've never noticed this before today, so I'm inclined to believe it just started.
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John,
I'm having the same problem. I've been eyeballing my activity monitor for a while and I can't tell if there's anything out of the ordinary on there. The only thing that looks odd is that the kernel_task is using about 1GB of virtual memory.
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I have 4 external drives with about 12 volumes on them and it's literally spinning up a drive every 5 minutes, 24x7 when I am not even using the computer. Nothing weird is running, and it's clear the application is exactly Finder. (and rarely, fseventsd). Here is the output of
sudo fs_usage -f filesys | grep Volumes
01:00:55 getattrlist
/Volumes/Uber
0.000012   Finder
01:00:55 getattrlist
/Volumes/Uber
0.000024   Finder
01:02:21 getattrlist
/Volumes/Big
0.000013   Finder
01:13:04 getattrlist
/Volumes/Giant
0.000014   Finder
01:13:15 getattrlist
/Volumes/Giant
0.000013   Finder
01:17:21 getattrlist
/Volumes/Big
0.000012   Finder
01:17:30 getattrlist
/Volumes/Big
0.000013   Finder
01:32:21 getattrlist
/Volumes/Big
0.000016   Finder
01:32:30 getattrlist
/Volumes/Big
0.000011   Finder
01:47:21 getattrlist
/Volumes/Big
0.000072   Finder
01:47:30 getattrlist
/Volumes/Big
0.000014   Finder
01:54:37 getattrlist
/Volumes/6snow
0.000012   Finder
01:54:49 getattrlist
/Volumes/6snow
0.000014   Finder
01:56:56 getattrlist
/Volumes/4tiger
0.000012   Finder
01:56:57 getattrlist
/Volumes/4tiger
0.000023   Finder
01:57:14 getattrlist
/Volumes/Medium
0.000014   Finder
01:57:23 getattrlist
/Volumes/Medium
0.000013   Finder
01:57:49 getattrlist
/Volumes/Small
0.000016   Finder
01:57:50 getattrlist
/Volumes/Small
0.000024   Finder
01:58:32 getattrlist
/Volumes/Little
0.000012   Finder
01:58:32 getattrlist
/Volumes/Little
0.000021   Finder
01:59:17 statfs
/Volumes/BACKUPUSB
0.000009   Finder
01:59:18 statfs
/Volumes/BACKUPUSB
0.000008   Finder
02:00:10 getattrlist
/Volumes/BABY
0.000014   Finder
02:00:21 getattrlist
/Volumes/BABY
0.000015   Finder
02:00:55 getattrlist
/Volumes/Uber
0.000019   Finder
02:02:21 getattrlist
/Volumes/Big
0.000015   Finder
02:10:01 getattrlist
/Volumes/Medium
0.000022   Finder
02:10:01 getattrlist
/Volumes/Uber
0.000010   Finder
02:10:01 statfs
/Volumes/BACKUPUSB
0.000009   Finder
02:10:01 getattrlist
/Volumes/BABY
0.000013   Finder
02:10:07 statfs
/Volumes/BACKUPUSB
0.000010   Finder
02:10:11 getattrlist
/Volumes/Medium
0.000023   Finder
02:10:11 getattrlist
/Volumes/Little
0.000025   Finder
02:10:11 getattrlist
/Volumes/Small
0.000012   Finder
02:10:12 getattrlist
/Volumes/Giant
0.000015   Preview
02:10:12 getattrlist
/Volumes/BABY
0.000010   Preview
02:10:12 getattrlist
/Volumes/Uber
0.000009   Preview
02:10:12 getattrlist
/Volumes/Big
0.000009   Preview
02:10:12 getattrlist
/Volumes/U3 System
0.000009   Preview
02:10:12 getattrlist
/Volumes/Medium
0.000011   Preview
02:10:12 getattrlist
/Volumes/4tiger
0.000010   Preview
02:10:12 getattrlist
/Volumes/Little
0.000009   Preview
02:10:12 getattrlist
/Volumes/Small
0.000009   Preview
02:10:12 getattrlist
/Volumes/6snow
0.000009   Preview
02:10:12 getattrlist
/Volumes/BACKUPUSB
0.000008   Preview
Note the 02:10:12 "all drives spin up" event. That was opening a PDF in Preview. The PDF was in my home directory/Downloads on "Macintosh HD". The rest is entirely Finder; I was doing nothing at all.
I'm hearing a spool-up literally every 4-5 minutes.
I have essentially given up, and dismounted all the drives until I have need for something on one of them. Of course that kills Time Machine.
Since there is no rime or reason for these accesses, I am NOT impressed with the argument that "drives should spin 24x7, it's better for them". This is a home system, not a server. I know how often I actually need data off these drives - several times a day and many days not at all. So I should use a program to force them to spin 24x7 (by doing more unnecessary accesses)? That's like leaving a hot water faucet open 24x7 to deal with a glitch in an on-demand water heater.
I want the drives to spin down. And stay spun down. And then, when I choose to access something on one of the drives, or an application has something it's going to actually use the drive for (e.g. midnight backups) -- I want it to spin up. Simple enough?
I am running 10.5 but my searches tell me Snow Leopard is worse, and Lion is worse yet.

Good point, just checked, and the answer is no. I had 3 Finder windows open, all viewing the main hard drive.
They did, of course, have the hard drive icons along the left edge.
Edit (from here):
But I wasn't doing anything with Finder during these times.
This activity occurred when I was not using the computer at all.
04:00:41 getattrlist
/Volumes/Uber
0.000009   ScreenSaverE
04:00:41 getattrlist
/Volumes/Uber
0.000022   ScreenSaverE
04:02:10 getattrlist
/Volumes/Uber
0.000015   Finder
04:02:22 getattrlist
/Volumes/Uber
0.000019   Finder
04:59:17 statfs
/Volumes/BACKUPUSB
0.000011   Finder
04:59:18 statfs
/Volumes/BACKUPUSB
0.000005   Finder
05:02:10 getattrlist
/Volumes/Uber
0.000013   Finder
05:02:21 getattrlist
/Volumes/Uber
0.000016   Finder
05:59:17 statfs
/Volumes/BACKUPUSB
0.000014   Finder
06:02:10 getattrlist
/Volumes/Uber
0.000013   Finder
06:02:21 getattrlist
/Volumes/Uber
0.000021   Finder
06:59:17 statfs
/Volumes/BACKUPUSB
0.000006   Finder
06:59:18 statfs
/Volumes/BACKUPUSB
0.000006   Finder

Hard Drive Spin Down....Good or Bad??

'Two questions, really, but first some background. I have an earlier Mac Pro running 10.7.3 (as I recall). I also have a Sonos music system. All the hard drive bays in the Mac Pro are occupied. The first has a 2 TB Western Digital RE that has my OS and all my files on it. Bay's 2 and 3 have two 3TB drives from Hitachi which are mirrored and serve as my internal daily backup which is run and cloned by CCC. The fourth drive is another RE that has copies of all my music. I simply copy my two iTunes folders and any other music I want the Sonos system to access to this fourth drive. My reason for doing this is that I wanted to minimize the run time of my main hard drive as not so long ago, I had two Seagate drives go belly up on me. All the music on the fourth drive (that serves the Sonos system) comes from my main hard drive which is backed up to the two mirrored internal drives as well as a G-Technolgy mirrored external drive, so I'm not concerned with backing up the drive serving the Sonos system. So......
Question one is: Which is better for drives in general, to keep them spinning all the time, or to allow or force them to spin down if they aren't being accessed?
Question two is: If it is better to spin down a drive, how can I selectively spin down some drives and not others?
For instance, I'm thinking that it is better to spin drives down, then I'd like to be able to spin down drive #1 with my OS but not the Sonos drive because the Sonos system prefers that the drive not spin down or there are connection errors.
Thanks for all your answers and suggestions!

I understand the limitions of mirrored drives, but my main drive is not mirrored. What is mirrored are my backup drives. One daily backup onto mirrored drives in bay's 3 and 4 in the Mac Pro. And a less frequent backup on mirrored drives that are stored in a fireproof safe in the garage. Should my main, non-mirrored drive fail (hopefully it'll be a long time as it's an enterprise class drive), I've then got any one of four cloned drives to choose from. Of course, I would choose the most recent ones that are internal, but should something catastrophic like a fire occur, I'd then have two identical cloned and bootable drives in the garage.
I recognize that in the case of a real catastrophy, the drives in the garage won't be as current as the drives in the Mac Pro, but in both cases, the backups themselves are pretty robust because they are mirrored. If one backup drive fails, the other will likely be fine and I can then easily proceed from there.
It set up properly, mirrored drives offer some great redundency in case of hard drive failure. What prompted me to go this route was three drive failures in one year, all of which were Seagate Barracuda drives and relatively new. And two of them were backup drives. My backup drives are now Hitachi and mirrored in case one dies. And CCC makes it so I can just plug the backup drive into my #1 bay and I'm back up in business. Except for MS Office which somehow limits the number of times it can be cloned and you have to call MS and get a new product code. Easy to do, but a pain. I learned this as a result of swapping cloned drives in and out of my wife's MacBook. It all worked perfectly until I did it once too many times and MS wouldn't load. Hence the call to MS.
Thanks for all your feedback!
Oh, and any info on controling which drives spin down and which don't?

G5 Hard Drive Spins out of control

Every so often (like today) since the day I brought this G5 home, the Hard Drive starts to spin out of control (whether in use or asleep). I then have to force it down. When I re-start, it's just fine. This probably happens once every three months. I could never get an answer from Mac - any ideas why this happens?

Have to say I have zero idea what an out of control spin would be (off the race track of course).
But with any system or hard drive issue, how about repairing the drive directory with Disk Warrior.
Force shutdowns generally cause directory problems. A Safe Boot helps, some. Not enough.
I would not say it is fine, though, and Apple First Aid doesn't do enough.
See this other thread with LOTS of good tips on troubleshooting:
http://discussions.apple.com/thread.jspa?threadID=2661574

Constant hard drive spin

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