Hard drive wakes up immediately after being put into standby

I have an IDE disk which, till now, I used to keep in standby mode (it makes an audible humming noise when it's working which annoys me a lot :<). Today I noticed that after running `hdparm -y' on it, it would spin down but then it would immediately spin up again. I'm certain that the disk isn't being used and doesn't have any partitions mounted anywhere on the filesystem. Still, I'm unable to pinpoint the reason it's waking up.
Any ideas on why this is happening?
Edit: It appears that the disk gets into standby by itself after 10 minutes. I wish I knew where this value is coming from. O.o
Edit2: Those 10 minutes must be coming from `hdparm -S1 /dev/sdb'; maybe the hard drive has a lower limit in regard to this setting. :3
(I'm not sure what kind of information would be useful in order to troubleshoot this issue, but below are some bits I believe are relevant)
Failed attempt to put the drive into standby:
[root@foutboxd ~]# hdparm -y /dev/sdb; hdparm -C /dev/sdb; sleep 1; hdparm -C /dev/sdb
/dev/sdb:
issuing standby command
/dev/sdb:
drive state is: standby
/dev/sdb:
drive state is: active/idle
hdparm -I:
[root@foutboxd ~]# hdparm -I /dev/sdb
/dev/sdb:
ATA device, with non-removable media
Model Number: WDC WD2500SB-01KBC0
Serial Number: WD-WCAL77403899
Firmware Revision: 08.02D08
Standards:
Supported: 6 5 4
Likely used: 8
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
CHS current addressable sectors: 16514064
LBA user addressable sectors: 268435455
LBA48 user addressable sectors: 488397168
Logical/Physical Sector size: 512 bytes
device size with M = 1024*1024: 238475 MBytes
device size with M = 1000*1000: 250059 MBytes (250 GB)
cache/buffer size = 8192 KBytes (type=DualPortCache)
Capabilities:
LBA, IORDY(can be disabled)
Standby timer values: spec'd by Standard, with device specific minimum
R/W multiple sector transfer: Max = 16 Current = 16
Recommended acoustic management value: 128, current value: 254
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* SMART feature set
Security Mode feature set
* Power Management feature set
* Write cache
* Look-ahead
* Host Protected Area feature set
* WRITE_BUFFER command
* READ_BUFFER command
* DOWNLOAD_MICROCODE
Power-Up In Standby feature set
* SET_FEATURES required to spinup after power up
SET_MAX security extension
* Automatic Acoustic Management feature set
* 48-bit Address feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART error logging
* SMART self-test
* SMART Command Transport (SCT) feature set
* SCT Long Sector Access (AC1)
* SCT LBA Segment Access (AC2)
* SCT Error Recovery Control (AC3)
* SCT Features Control (AC4)
* SCT Data Tables (AC5)
Security:
Master password revision code = 65534
supported
not enabled
not locked
not frozen
not expired: security count
not supported: enhanced erase
HW reset results:
CBLID- above Vih
Device num = 0 determined by the jumper
Checksum: correct
smartctl --all:
[root@foutboxd ~]# smartctl --all /dev/sdb
smartctl version 5.38 [x86_64-unknown-linux-gnu] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/
=== START OF INFORMATION SECTION ===
Model Family: Western Digital Caviar RE EIDE family
Device Model: WDC WD2500SB-01KBC0
Serial Number: WD-WCAL77403899
Firmware Version: 08.02D08
User Capacity: 250,059,350,016 bytes
Device is: In smartctl database [for details use: -P show]
ATA Version is: 6
ATA Standard is: Exact ATA specification draft version not indicated
Local Time is: Wed Mar 11 21:47:50 2009 EET
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
General SMART Values:
Offline data collection status: (0x84) Offline data collection activity
was suspended by an interrupting command from host.
Auto Offline Data Collection: Enabled.
Self-test execution status: ( 0) The previous self-test routine completed
without error or no self-test has ever
been run.
Total time to complete Offline
data collection: (6951) seconds.
Offline data collection
capabilities: (0x7b) SMART execute Offline immediate.
Auto Offline data collection on/off support.
Suspend Offline collection upon new
command.
Offline surface scan supported.
Self-test supported.
Conveyance Self-test supported.
Selective Self-test supported.
SMART capabilities: (0x0003) Saves SMART data before entering
power-saving mode.
Supports SMART auto save timer.
Error logging capability: (0x01) Error logging supported.
No General Purpose Logging support.
Short self-test routine
recommended polling time: ( 2) minutes.
Extended self-test routine
recommended polling time: ( 88) minutes.
Conveyance self-test routine
recommended polling time: ( 5) minutes.
SCT capabilities: (0x003f) SCT Status supported.
SCT Feature Control supported.
SCT Data Table supported.
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000b 200 200 051 Pre-fail Always - 0
3 Spin_Up_Time 0x0007 236 124 021 Pre-fail Always - 708
4 Start_Stop_Count 0x0032 098 098 040 Old_age Always - 2680
5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0
7 Seek_Error_Rate 0x000b 200 200 051 Pre-fail Always - 0
9 Power_On_Hours 0x0032 081 081 000 Old_age Always - 14289
10 Spin_Retry_Count 0x0013 100 100 051 Pre-fail Always - 0
11 Calibration_Retry_Count 0x0013 100 100 051 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 098 098 000 Old_age Always - 2365
194 Temperature_Celsius 0x0022 123 092 000 Old_age Always - 27
196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0
197 Current_Pending_Sector 0x0012 200 200 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0012 200 200 000 Old_age Always - 0
199 UDMA_CRC_Error_Count 0x000a 200 253 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x0009 200 200 051 Pre-fail Offline - 0
SMART Error Log Version: 1
No Errors Logged
SMART Self-test log structure revision number 1
No self-tests have been logged. [To run self-tests, use: smartctl -t]
SMART Selective self-test log data structure revision number 1
SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
1 0 0 Not_testing
2 0 0 Not_testing
3 0 0 Not_testing
4 0 0 Not_testing
5 0 0 Not_testing
Selective self-test flags (0x0):
After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay
Last edited by foutrelis (2009-03-12 10:18:25)

Here is what i get when i try that command.:
$ sudo hdparm -B 254 /dev/sdc
/dev/sdc:
setting Advanced Power Management level to 0xfe (254)
HDIO_DRIVE_CMD failed: Input/output error
APM_level = not supported
I tried other values also and its always the same error.
I just did another try with -y and the drive stayed in standby during ±40 minutes this time. The most annoying part is that is something that was not happening before I am pretty sure that it would stay in standby for days.
I also included my results for hdparm -I.:
$ sudo hdparm -I /dev/sdc
/dev/sdc:
ATA device, with non-removable media
Model Number: WDC WD800JB-00JJC0
Serial Number: WD-WCAM9N730552
Firmware Revision: 05.01C05
Standards:
Supported: 6 5 4
Likely used: 8
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
CHS current addressable sectors: 16514064
LBA user addressable sectors: 156299375
Logical/Physical Sector size: 512 bytes
device size with M = 1024*1024: 76318 MBytes
device size with M = 1000*1000: 80025 MBytes (80 GB)
cache/buffer size = 8192 KBytes
Capabilities:
LBA, IORDY(can be disabled)
Standby timer values: spec'd by Standard, with device specific minimum
R/W multiple sector transfer: Max = 16 Current = 1
Recommended acoustic management value: 128, current value: 254
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* SMART feature set
Security Mode feature set
* Power Management feature set
* Write cache
* Look-ahead
* Host Protected Area feature set
* WRITE_BUFFER command
* READ_BUFFER command
* DOWNLOAD_MICROCODE
SET_MAX security extension
* Automatic Acoustic Management feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* SMART error logging
* SMART self-test
* SMART Command Transport (SCT) feature set
* SCT Long Sector Access (AC1)
* SCT LBA Segment Access (AC2)
* SCT Error Recovery Control (AC3)
* SCT Features Control (AC4)
* SCT Data Tables (AC5)
Security:
Master password revision code = 65534
supported
not enabled
not locked
frozen
not expired: security count
not supported: enhanced erase
HW reset results:
CBLID- above Vih
Device num = 0 determined by the jumper
Checksum: correct

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I have an imac 20 in. The old hard drive crapped out on me. i put a new harddrive in and am now trying to install linux. But the imac doesnt recognise any keyboards

I have an imac 20 in. The old hard drive crapped out on me. i put a new harddrive in and am now trying to install linux. But the imac doesnt recognise any keyboards

Without a bootable backup/clone or a Time Machine backup of your previous Snow Leopard installation or a saved copy of Lion's install app, you'll have to upgrade your Leopard volume to Snow Leopard (10.6.6+) so you can waste another hour or more DLing the Lion thing again.

I connected my external hard drive to my new imac to put all of the information from my macbook onto it. i have been working on the macbook now and want to reconnect the external hard drive so my imac is updated with the work. How is that done?

I connected my external hard drive to my new imac to put all of the information from my macbook onto it. I have been working on the macbook now and want to reconnect the external hard drive so my imac is updated with the work. How is that done? or is it possible?

As I said, I don't use Time Machine, so it'd be best to wait for an "expert" answer, but, with my very limited knowledge, I'd say: probably not - so, for now, I'd suggest you read up on Time Machine:
http://web.me.com/pondini/Time_Machine/Home.html
http://support.apple.com/kb/index?page=search&src=support_site.home.search&local e=en_US&q=time%20machine
And, you might be attracting more knowledgeable answers if you were to post this question in the Time Machine Forum (part of the Snow Leopard forums).

My iPod classis is not recognized by my Macbook and self-ejects immediately after being plugged in?

Hello,
I have an iPod classic and I am using a Macbook Pro running Mavericks. Since the last iTunes update i have not been able to connect my iPod to iTunes. I have tried both USB ports and it still won't work. The iPod ejects itself immediately after being plugged in. The usb ports are working, I've tried an iPod touch and an iPhone 4s, so that doesn't seem to be the issue either. Appreciate any help!

Hi luisxjim,
Thanks for using Apple Support Communities. This article has some steps that may help if your iPod classic isn't being recognized by your computer:
iPod not recognized in iTunes and Mac desktop
http://support.apple.com/kb/TS1410
Cheers,
- Ari

My iPad mini adapter shorted...I bought a new one but since it charges very slowly and when charged to 100% it falls to 95% immediately after being unplugged...what might be the issue????

my iPad mini adapter shorted...I bought a new one but since it charges very slowly and when charged to 100% it falls to 95% immediately after being unplugged...what might be the issue????

When it does that. Replug the charger and charge to 100%. Now does is stay charged when you unplug the charger.
You may need to recalibrate your battery.
Apple recommends that once a month you let the iPad fully discharge & then recharge to 100%.
How to Calibrate Your Mac, iPhone, or iPad Battery
http://www.macblend.com/how-to-calibrate-your-mac-iphone-or-ipad-battery/
 Cheers, Tom

My Macbook starts up, shows the screen saver, then immediately goes to sleep. I tap the spacebar, it comes back for a second, shows the tool bar and the hard drive icon then immediately "goes to sleep". This can go on forever, on, sleep, on, sleep.

My Macbook starts up, shows the screen saver, then immediately goes to sleep. I tap the spacebar, it comes back for a second, shows the tool bar and the hard drive icon then immediately "goes to sleep". This can go on forever, on, sleep, on, sleep. I can only see the screen for maybe 3-5 seconds; not enough time to do anything. Someone did step on it, so I don't know if the problem is with screen or ??
Thanks!

Hello, Juniorjr2.
Thank you for visiting Apple Support Communities.
This sounds like screen curtain may be enabled. Screen curtain is a feature that allows display privacy. To disable screen curtain while VoiceOver is enabled, you can three finger triple tap the screen to disable this feature. You may need to press the home button once in order to process these steps. If you wish to disable VoiceOver, see the link in the article below.
iOS: Configuring accessibility features
http://support.apple.com/kb/HT5018
If the issue persists, try reaching out to us here.
Cheers,
Jason H.

Hard drive wakes up immediately after being put into standby

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