New WD Hard Drive ATA Link Errors

Hi there,
I just bought a new hard drive for my lenovo ThinkPad R60e. It is the following model:
# hdparm -I
ATA device, with non-removable media
Model Number: WDC WD5000BUDT-63G8FY0
Firmware Revision: 01.01A01
Transport: Serial, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6
Standards:
Supported: 8 7 6 5
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: 976773168
Logical Sector size: 512 bytes
Physical Sector size: 4096 bytes
Logical Sector-0 offset: 0 bytes
device size with M = 1024*1024: 476940 MBytes
device size with M = 1000*1000: 500107 MBytes (500 GB)
cache/buffer size = unknown
Nominal Media Rotation Rate: 5400
Capabilities:
LBA, IORDY(can be disabled)
Queue depth: 32
Standby timer values: spec'd by Standard, with device specific minimum
R/W multiple sector transfer: Max = 16 Current = 0
Advanced power management level: 128
Recommended acoustic management value: 128, current value: 254
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5 udma6
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
* NOP cmd
* DOWNLOAD_MICROCODE
* Advanced Power Management feature set
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
Media Card Pass-Through
* General Purpose Logging feature set
* 64-bit World wide name
* URG for READ_STREAM[_DMA]_EXT
* URG for WRITE_STREAM[_DMA]_EXT
* IDLE_IMMEDIATE with UNLOAD
* {READ,WRITE}_DMA_EXT_GPL commands
* Segmented DOWNLOAD_MICROCODE
* Gen1 signaling speed (1.5Gb/s)
* Gen2 signaling speed (3.0Gb/s)
* Native Command Queueing (NCQ)
* Host-initiated interface power management
* Phy event counters
* Idle-Unload when NCQ is active
* NCQ priority information
DMA Setup Auto-Activate optimization
Device-initiated interface power management
* Software settings preservation
* SMART Command Transport (SCT) feature set
* SCT Features Control (AC4)
* SCT Data Tables (AC5)
unknown 206[12] (vendor specific)
unknown 206[13] (vendor specific)
unknown 206[14] (vendor specific)
Security:
Master password revision code = 65534
supported
not enabled
not locked
not frozen
not expired: security count
supported: enhanced erase
138min for SECURITY ERASE UNIT. 138min for ENHANCED SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 50014ee60132e99d
NAA : 5
IEEE OUI : 0014ee
Unique ID : 60132e99d
Checksum: correct
As it uses Advanced Format, I did an aligned partitioning as you can see here:
# fdisk -u -l
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x04801fe0
Device Boot Start End Blocks Id System
/dev/sda1 2048 224909 111431 83 Linux
/dev/sda2 224912 44275139 22025114 83 Linux
/dev/sda3 44275144 48484169 2104513 83 Linux
/dev/sda4 48484176 976768064 464141944+ 83 Linux
After that I tried to copy my old system and data from the old hard drive (The new WD drive was built into the laptop and the old drive connected via SATA2USB adaptor). After a few minutes the hdd started to hang and the following messages occured in "dmesg"
[ 934.624568] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
[ 934.624575] ata1.00: BMDMA stat 0x25
[ 934.624583] ata1.00: failed command: WRITE DMA EXT
[ 934.624596] ata1.00: cmd 35/00:80:68:2b:13/00:01:2d:00:00/e0 tag 0 dma 196608 out
[ 934.624599] res 61/04:10:f0:1c:13/04:00:2d:00:00/e0 Emask 0x1 (device error)
[ 934.624606] ata1.00: status: { DRDY DF ERR }
[ 934.624611] ata1.00: error: { ABRT }
[ 934.631465] ata1.00: failed to read native max address (err_mask=0x1)
[ 934.631472] ata1.00: HPA support seems broken, skipping HPA handling
[ 934.646871] ata1.00: configured for UDMA/133 (device error ignored)
[ 934.646890] ata1: EH complete
[ 1234.019934] ata1: link is slow to respond, please be patient (ready=0)
[ 1239.033266] ata1: device not ready (errno=-16), forcing hardreset
[ 1239.033279] ata1: soft resetting link
[ 1244.199930] ata1: link is slow to respond, please be patient (ready=0)
[ 1249.053269] ata1: SRST failed (errno=-16)
[ 1249.053282] ata1: soft resetting link
[ 1254.219921] ata1: link is slow to respond, please be patient (ready=0)
[ 1259.073267] ata1: SRST failed (errno=-16)
[ 1259.073279] ata1: soft resetting link
[ 1264.239938] ata1: link is slow to respond, please be patient (ready=0)
First I thought it looks like a problem with the SATA connector within my notebook, but it shouldn't be case as the hdd sits tight and the old one still works. Moreover I tried to change SATA settings in BIOS from "AHCI" to "Compatibility" in case of a driver fault, but this also didn't fix the issue.
For now I have connected the new hard drive with the SATA2USB adaptor and do some writing on it via dd. In this case, the errors do not occur at all.
The disk now gives me errors even if connected via USB. So I assume it is a hardware defect. The Western Digital Drive Check tools won't boot, but, I think these errors are more or less unambiguous
[ 268.018935] Buffer I/O error on device sdb, logical block 77649
[ 268.018938] lost page write due to I/O error on sdb
[ 268.226335] sd 2:0:0:0: [sdb] Unhandled sense code
[ 268.226340] sd 2:0:0:0: [sdb] Result: hostbyte=0x00 driverbyte=0x08
[ 268.226345] sd 2:0:0:0: [sdb] Sense Key : 0x3 [current]
[ 268.226350] sd 2:0:0:0: [sdb] ASC=0xc ASCQ=0x0
[ 268.226355] sd 2:0:0:0: [sdb] CDB: cdb[0]=0x2a: 2a 00 00 09 7b 30 00 00 f0 00
[ 268.226366] end_request: I/O error, dev sdb, sector 621360
[ 268.434722] sd 2:0:0:0: [sdb] Unhandled sense code
[ 268.434732] sd 2:0:0:0: [sdb] Result: hostbyte=0x00 driverbyte=0x08
[ 268.434740] sd 2:0:0:0: [sdb] Sense Key : 0x3 [current]
[ 268.434748] sd 2:0:0:0: [sdb] ASC=0xc ASCQ=0x0
[ 268.434756] sd 2:0:0:0: [sdb] CDB: cdb[0]=0x2a: 2a 00 00 09 7c 20 00 00 f0 00
[ 268.434775] end_request: I/O error, dev sdb, sector 621600
[ 268.642711] sd 2:0:0:0: [sdb] Unhandled sense code
[ 268.642718] sd 2:0:0:0: [sdb] Result: hostbyte=0x00 driverbyte=0x08
[ 268.642723] sd 2:0:0:0: [sdb] Sense Key : 0x3 [current]
[ 268.642728] sd 2:0:0:0: [sdb] ASC=0xc ASCQ=0x0
[ 268.642733] sd 2:0:0:0: [sdb] CDB: cdb[0]=0x2a: 2a 00 00 09 7d 10 00 00 f0 00
[ 268.642744] end_request: I/O error, dev sdb, sector 621840
[ 268.849950] sd 2:0:0:0: [sdb] Unhandled sense code
[ 268.849956] sd 2:0:0:0: [sdb] Result: hostbyte=0x00 driverbyte=0x08
[ 268.849961] sd 2:0:0:0: [sdb] Sense Key : 0x3 [current]
[ 268.849967] sd 2:0:0:0: [sdb] ASC=0xc ASCQ=0x0
[ 268.849971] sd 2:0:0:0: [sdb] CDB: cdb[0]=0x2a: 2a 00 00 09 7e 00 00 00 f0 00
[ 268.850004] end_request: I/O error, dev sdb, sector 622080
[ 269.057592] sd 2:0:0:0: [sdb] Unhandled sense code
[ 269.057598] sd 2:0:0:0: [sdb] Result: hostbyte=0x00 driverbyte=0x08
[ 269.057603] sd 2:0:0:0: [sdb] Sense Key : 0x3 [current]
[ 269.057608] sd 2:0:0:0: [sdb] ASC=0xc ASCQ=0x0
[ 269.057612] sd 2:0:0:0: [sdb] CDB: cdb[0]=0x2a: 2a 00 00 09 7e f0 00 00 f0 00
[ 269.057624] end_request: I/O error, dev sdb, sector 622320
[ 299.466711] usb 1-1: reset high speed USB device number 3 using ehci_hcd
[ 329.760049] usb 1-1: reset high speed USB device number 3 using ehci_hcd
[ 354.454537] usb 1-1: USB disconnect, device number 3
[ 354.458395] sd 2:0:0:0: [sdb] Unhandled error code
[ 354.458404] sd 2:0:0:0: [sdb] Result: hostbyte=0x01 driverbyte=0x00
[ 354.458412] sd 2:0:0:0: [sdb] CDB: cdb[0]=0x2a: 2a 00 00 09 7f e0 00 00 f0 00
[ 354.458431] end_request: I/O error, dev sdb, sector 622560
[ 354.458446] quiet_error: 170 callbacks suppressed
[ 354.458451] Buffer I/O error on device sdb, logical block 77820
For the sake of completeness, here are the SMART values:
smartctl 5.40 2010-02-03 r3060 [i686-pc-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net
=== START OF INFORMATION SECTION ===
Device Model: WDC WD5000BUDT-63G8FY0
Firmware Version: 01.01A01
User Capacity: 500,107,862,016 bytes
Device is: Not in smartctl database [for details use: -P showall]
ATA Version is: 8
ATA Standard is: Exact ATA specification draft version not indicated
Local Time is: Sun Jul 10 09:44:26 2011 CEST
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: (0x00) Offline data collection activity
was never started.
Auto Offline Data Collection: Disabled.
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: (13560) 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.
General Purpose Logging supported.
Short self-test routine
recommended polling time: ( 2) minutes.
Extended self-test routine
recommended polling time: ( 158) minutes.
Conveyance self-test routine
recommended polling time: ( 5) minutes.
SCT capabilities: (0x7031) 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 0x002f 200 200 051 Pre-fail Always - 0
3 Spin_Up_Time 0x0027 189 185 021 Pre-fail Always - 1541
4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 54
5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0
7 Seek_Error_Rate 0x002e 200 200 000 Old_age Always - 0
9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 16
10 Spin_Retry_Count 0x0032 100 253 000 Old_age Always - 0
11 Calibration_Retry_Count 0x0032 100 253 000 Old_age Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 50
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 36
193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always - 164
194 Temperature_Celsius 0x0022 111 105 000 Old_age Always - 36
196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0
197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0030 100 253 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x0008 100 253 000 Old_age 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.
It is regardless which kernel version I use (latest ARCH 2.6.39 or 2.6.23 from a grml live system), the error is persistent everywhere.
I will just send it back for warranty. In fact, it's another prove for today's harddisk "quality"
EDITED: 1. forgot some detail in dmesg; 2. Finally got it
Last edited by fixje (2011-07-10 11:35:06)

We call it case or drive hum. And it seems like a harmonic clash of two devices, or the 2nd hard drive causing the case itself (metal case).
There are shock absorbent washers on the side metal door.
Drive is attached and firmly installed and the latch on the back is securely in down and lock position.
And of course it still happens.
Me, I'd pull the old inefficient 250GB drive with 8MB cache, the Seagate 7200.9s that some shipped with were horrible performance and noise).
What I do with drive is run it through WD Lifeguard in Windows a couple times (Extended Test, full format instead of quick).
Some people sought out drive sled anti-vibration washers to fit to the sled (can't change the height though in order to fit properly).
Turn off "allow drives to spin down when not in use" if on.

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Maybe this following post I made to a different questions may help. The data on the drive is other buying another program for if it will work. I think my next step may be to go over to a friends place and try to mount the drives on his computer and transfer stuff off if they connect.
text below posted to other question relating to external hard drive problem.
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Anybody have any clue what might be going on here? It really seems to be related to my upgrade.

Hard Drive "Input Output" Error When Attempting to Format

A friend just gave me a nice PowerBook that seems to be in need of a fresh OS and when attempting to format the hard drive I am getting an "Input Output" error. Any suggestions to overcome this issue and format the drive?

Hi all,
I'm having similar issues on a white macbook (2006 model). I ran into some trouble with it about a month ago, when on booting up, it showed only the folder with a question mark. Booting up from the original grey install DVD worked, so I thought the problem was most likely a faulty hard drive.
It's only after having this problem, that I came across this recall for possible faulty hard drives, that Apple offered:
http://www.apple.com/support/macbook/hd/repairextension/
Doh! Too late?
So, I got onto ebay and picked up a deal and received my new hard drive yesterday. I swapped out the original 80GB with 320GB, only to find the same input/output error described by the OP, here (also in a couple of other Apple discussion posts - see below).
Disk utility shows the new hard drive to be 2.3TB in size! Should be 320GB - but, this is also what others have described. See e.g.,:
https://discussions.apple.com/message/16090313#16090313
I've run the extended testing from the CD (holding down 'D' on boot-up) and it reported no problems. Also, similar to others experiences:
https://discussions.apple.com/message/16081818#16081818
So, what can the problem be?!?!?!?!?
In this post, JMPC suggests it has something to do with the size of the new internal hard drive....groan.....:
https://discussions.apple.com/message/16145560?tstart=0#16145560?tstart=0
Can anyone confirm this?

External hard drive that had my itunes on it crashed; had to recover data on new external hard drive; not can't access iTunes from my iMac - how do I name it correctly in order to make iTunes work again

how do I set up a new external hard drive with my recovered iTunes (from a hard drive that crashed & had to be replaced) so that I can access iTunes on my iMac again?

Take a look at this link, http://support.apple.com/kb/ht2519

Will a new 320gb hard drive work on a mac book pro 3,1

purchased new 320GB hard drive for a mac book pro 3,1. Old HD has link speed of 1.5GB, new HD transfers at 3GB. New HD will not boot up. Can link speed be changed on mac book pro 3,1.

Have you already initialized/partitioned the new drive? If yes, you've installed the operating system on it, and it doesn't boot? You've tried a safe-mode boot (hold the shift key when booting)?

How do I backup to time machine with a new internal hard drive?

My Macbook Pro's hard drive got corrupted about a year ago so I had to get the hard drive completely replaced. However, I wanted to start backing up my data to time machine so if the same situation were to reoccur, I would be better prepared. For some reason Time Machine does not recognize the new internal hard drive of the computer as it is supposed to. Could someone please help? thank you in advanced
Current OS: OS X 10.8.4

That error message is saying that it is attempting to setup a Time Capsule for Time Machine to backup your data on.
Do you have a Time Capsule?
Do you have an external Disk Drive?
You can do a backup to the internal disk drive. It is worthless to do that.
Allan

New SCSI hard drive problem: Device busy too long

I set up second SCSI hard drive for my sun box Sparc Station 20. The set up is as follows:
New SCSI hard drive (ID #2) connects to Sun box and connects to tape drive (SCSI #4) with terminator.
Hard drive is Seagate model ST15150N with J01 (open : means disable drive terminator) and J04 (jumper on second position, ID=2).
I CAN format the hard drive and assign label etc.. but when I type the command : > newfs /dev/rdsk/c1t2d0s7 (I use whole slice 7 as one partition and c1 is my second controller).
The following error displays continuously:
WARNING: /iomnn@f,e0000000/sbus@f,e0001000/dma@1,81000/esp@1,80000/sd@2,0 device busy too long
Is this error come from the wrong hardware set up or from other reason ? Any suggestion is welcome . Thanks in advance.
William

First of all, thanks for your reply. I appreciate it.
A couple of things. I check my system profiler and I couldn't find out what kind of SCSI card I have. I even opened up my machine and there wasn't any writing on it. So how do I find out what type of card I have? My other question is if the same card worked for the SCSI drive I had before, why won't it work on the new drive. I've set it as the master at the end of the SCSI cord and like I said I used CCC. The drive shows up on my desktop but won't boot. Should I try loading OS from disks instead of using CCC?

KT4 Ultra w/ 2 hard drives ATA 100

Hi,
I have 2 hard drives ATA 100. One is plugged as master on IDE1 (40Go) and second one as master on IDE2 (160Go).
On the first one, I can activate Ultra DMA mode 5 while on the second one I can only go up to Ultra mode 2.
I tried to connect the second hard drive on IDE1 (still in master mode) and then I can reach Ultra mode 5 (first hd being unplugged).
So it seems that the ATA 100 is not activated on the IDE2.
I am not a geek, sorry, and I am wondering if there is a mistake somewhere (jumper to be set) or a bios feature to activate ?
Thanks in advance for your help.
PS : I have two cd burner in slave mode on IDE1 & IDE2
-Motherboard type and model : MSI-6590
-Bios type and revision : AMI rev 1.4
-CPU type and model : AMD Athlon FX-Xp 2000+
-512Mo PC2700 ?
-Hard Drives IDE :
IDE1 : Excelstor 40Go J240
IDE2 : Seagate Barracude 7200.7 160Go ST3160023A
-Gnu/Linux 2.6
Fred

Hello Fred:
Have you installed the most recent drivers?
It is possible there is a driver problem. There was a driver release for Win2k in January of 2005 of the 'VIA 4 in1 drivers'
It says 'Enable VT8251 IDE DMA function under Windows 2000'
It is at this link:
http://www.msi.com.tw/program/support/download/dld/spt_dld_detail.php?UID=356&kind=1
These don't do you much good since you are using Linux 2.6. You didn't identify your distro but you should check for any updates if you haven't already.
It's possible that the Win2k bug was also in the Linux drivers.
I assume you are probing the Linux message boards as well.
Besides this, I'm not sure what your problem is. You could try disconnecting the CD burners (slave) and see what happens.
ss

Transfer iPod Touch Apps with new main hard drive on Windows PC

Replacing main hard drive, which hosted iTunes account.
For songs, I have already saved to 4 DVD's.
For iTunes, a new main hard drive will look like a new PC, I'd think. Should I de-authorize my account on the current PC/drive before installing new hard drive? Then download iTunes and set up under previous email & PW?
Other content?
For photos and MS Outlook contacts, I can re-link to restored data.
How about downloaded and purchased Apps? Will they survive on the Touch or need I take further action on the PC?
Thanks!

Make sure your new computer is authorized in iTunes. Disable autosync in itunes, connect your ipod, right click on it in the device list and choose backup.
This will save data, pictures and settings to itunes. See what's included in this backup here: http://support.apple.com/kb/HT1766
Transfer your purchases the same way to copy all apps and bought media from the Store to your computer.
Set up at least one contact and event on your computer to be able the merge your calendars and contacts after your ipod got wiped during the first sync.
The rest of the data can be restored from the backup you made.
Restoring: http://support.apple.com/kb/HT1414

I have been storing my Aperture and IMovie Libraries on an external hard drive that recently died. Fortunately I've been using Time Machine to back up to a 2nd external drive. How do I restore my libraries to a new external hard drive?

I have been storing my Aperture and IMovie Libraries on an external hard drive that recently died. Fortunately I've been using Time Machine to back up to a 2nd external drive. How do I restore my libraries to a new external hard drive?

This is a tricky one.
Open up Time Machine and go back to a date using the timeline on the right side of the window when you know the drive was working and was backing up as part of Time Machine backups.
Click on the name of your Mac under the Devices heading on the left side of the window in Time Machine, and if things are working correctly you will see Macintosh HD (or whatever you have named it) and the name of the external hard drive that was backing up in the past.
Right-Click on the name of the external hard drive and then click on "Restore (name of drive) to....." You may be asked for your adminstrator password at this point.
It might be easier to restore the drive contents to your desktop if you have room on your Mac, and then copy things over to the new external drive where you want to store the Aperture and iMovie Libraries.
Once the libraries have been moved over the new external hard drive, you will likely need to "point" Aperture and iMovie to the location of the libraries on the new external hard drive.

I bought a new external hard drive for backups, but time machine won't do a full back up. I think it is remembering backing up onto previous external hard drives, which I don't own anymore. How do I do a new full backup?

I bought a new external hard drive for backups, but time machine won't do a full back up.
I think it is remembering backing up onto previous external hard drives, which I don't own anymore. How do I do a new full backup?
When I bought the new (used) iMac, I also bought an external hard drive for backups. It worked fine, but my husband stole it.
Then I bought a new external hard drive (Seagate) and it worked fine for three weeks, then died.
So I just got a new external hard drive, which was put together from an internal hard drive and a hard drive enclosure.
Time machine did the first backup today, and it should have taken 9 hours like it did on the previous first time full back up. Instead, it took 30 minutes. That can't be right. I want to start over and do a full backup to make sure everything gets onto my new external hard drive, but I can't figure out how to do that. Please help.

Triple-click anywhere in the line below to select it:
tmutil compare -E
Copy the selected text to the Clipboard (command-C).
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window (command-V).
The command will take at least a few minutes to run. Eventually some lines of output will appear below what you entered.
Each line that begins with a plus sign (“+”) represents a file that has been added to the source volume since the last snapshot was taken. These files have not been backed up yet.
Each line that begins with an exclamation point (“!”) represents a file that has changed on the source volume. These files have been backed up, but not in their present state.
Each line that begins with a minus sign (“-“) represents a file that has been removed from the source volume.
At the end of the output, you’ll get some lines like the following:
Added:
Removed:
Changed:
These lines show the total amount of data added, removed, or changed on the source(s) since the last snapshot.

New WD Hard Drive ATA Link Errors

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