What is a CRC Error Count in SMART Utility

Ok...I've been having a massive beach balling problem, and was told by one of the fellow community members to DL a SMART Utility..which I did.
My CRC Error Count is now starting to climb, and is up to 2289. I also started with NO errors, and am now up to 12 errors, with the last error being "command aborted". Help please! I think my HD is failing, but SMART says no.

Cyclic Redundancy Check is a common technique for detecting data transmission errors.
As long as you got your data backed up, you have nothing to worry about.
TimeMachine on one powered external drive conected all the time and a Carbon Copy Clone on another disconnected and updated once a week is prefered.
Format both external drives HFS+Journaled in Disk Utility.
Your covered both from human errors and hardware failures as you can hold option key and boot off the clone.
If your having problems you can try cleaning everything out of your caches and letting the computer rebuild itself.
Downlaod and run ALL the cleaning and maintainece aspects of the FREE OnyX and reboot
http://www.titanium.free.fr/
Hold c and boot off the disk that comes with your comptuer and under the Utilities menu is Disk Utility
Select your drive on the left and Repair Permisisons (ignore what you see)
Then Repair Disk, if you get any errors here that are NOT repaired, then you got a issue with your drive.

Similar Messages

Ultra DMA CRC Error Count

I have a SATA 6 drive which is being downgraded from Ultra DMA by Windows 7. It used to handle about 130MB/s, now it's being limited to 25MB/s. This is apparently due to the Ultra DMA CRC Error Count going to 9 from a bad connection. I've
replaced the connection, but cannot find any way to make Windows 7 retry the drive at the higher data rate.
With Windows XP there was a registry key (ResetErrorCountersOnSuccess) that you could add to make it re-detect, but this doesn't appear to work with Windows 7. In fact all the solutions I can find online only seem to work with XP. Is there some
way to fix this without re-initializing the drive? I really don't relish the idea of transferring 4TB of data at 25MB/s (40+ hours!) just to reset the drive.

Hi,
Have you tried to manually turn DMA on through device manager?
Please take a try with the follwoing steps:
Open Device Manager by clicking the Start button , clicking
Control Panel, clicking System and Security, and then, under
System, clicking Device Manager.‌ If you're prompted for
an administrator password or confirmation, type the password or provide confirmation.
Double-click IDE ATA/ATAPI controllers.
Under IDE ATA/ATAPI controllers, for each item that has the word
Channel as part of its label, right-click the item, and then click
Properties.
Click the Advanced Settings tab. Under Device Properties, select or clear the
Enable DMA check box, and then click OK.
More information, please see:
Turn Direct Memory Access (DMA) on or off
Best regards
Michael Shao
TechNet Community Support

What has caused "data error count" under execution detail on Audit browser

Hi,
I have a simple mapping that load data from external table to target fact table. From OWB Runtime Audit browser, the Execution Details page show the status= Complete + <Red error sign>. And the value under Data error count is 2563. Where can I look for information about what has caused this errors or what the data error are? The SQL*Loader log file looks OK and no bad file generated. And I don't see suspecious under WB_RT_AUDIT*, WB_RT_ERROR tables It's owb9ir2 on 9iDB Thanks.

Solved. I set the audit level to the highest and re-executed and can see the error msg now. It would be nice if audit broser can show the report for all the rejected rows.

How can I narrow down what's causing CRC errors over internet downloads?

I'm trying to determine if its something wrong with my hardware configuration, my software or my actual internet connection that is giving me trouble.
Recently with my new build I am noticing all my downloads being large or small ending up either not fully downloaded or just full with CRC errors.
I'm not even sure where to begin as I've been trying to troubleshoot this for a few days and it just seems to keep getting worse.
My initial problem was the new nforce ide drivers that didn't quite gel with my optical drives. I ended up unstalling the ide drivers and my optical drives worked correctly again. (problem with optical drive was when you put a dvd writer (lite on 411s) in the system would freeze and not play the movie until the disk was ejected - then everything would return to normal)
After trying to find a fix or someway to get the drivers to work I started to notice I had trouble downloading large files off news servers. For the past 3 days I just downloaded random stuff that looked to be complete as in all the files were there with pars. I download the files and the winrar gives me crc errors and the pars say the files are incomplete.
Then I start to try to download any large file off the internet - game demos mostly off gamespy.com and the downloads just stop midway.
All these problems just started to add up and I'm having a hard time trying to narrow down and knock off what it is and what not.
Basically to start is there a way I can see if it's something related to my ide drivers, aspi drivers, internet connection, cable problem etc. Please help, it's driving me nuts. =)
System
AMD 64 3000+
PQI Turbo 1 gig
Neo K8n Platinum (Bios 1.4)
Lite on DVD
Lite on 411s DVD writer
PNY 6800GT
Antec 420 TruPower (20amps on 12v)
Audigy 2
Help me please..

Are you running xp sevice pack 2? I was having issues with having to refresh my browser several times to get a page to load, and downloads sometimes stopped.
I downloaded the following sp2 patch from microsoft and it fixed the refresh issues,
http://www.winnetmag.com/windowspaulthurrott/Article/ArticleID/44014/windowspaulthurrott_44014.html
If you are browsing while the download runs, it could be sp2's new 10 connection limit. I tweaked it to 50 connections and fixed ie stalling when loading long forum pages with alot of signatures present. (I tweaked it with xp-anti spy)
Can you tell Im guessing?
Possibly a bad ide or sata cable?
Have you tried running memtest to test for errors? I prefer goldmemory as I believe it is more sensitive to errors with an a64. It found errors memtest didnt.
This system is giving you a much harder time than it should. Maybe you have a flaky board or memory errors.
good luck at any rate. (p.s. its 3 am here, couldnt sleep, prob not making alot of sense at this point. lol)

Generic Error count singnificant increment

Hi ,
What are the reasons for the Generic Error count to increment singificantly . do we need to concern on these counters .
*               Plim-asic ASIC Error Summary               *
Instance              : 0
Number of nodes       : 5
SBE error count       : 0
MBE error count       : 0
Parity error count    : 0
CRC error count       : 0
Generic error count   : 37828019
Reset error count     : 0
Instance              : 1
Number of nodes       : 5
SBE error count       : 0
MBE error count       : 0
Parity error count    : 0
CRC error count       : 0
Generic error count   : 4001807772
Reset error count     : 0
Thanks & Regards,
Gobinath.

Hello,
GENERIC Errors — Errors that do not fall under any of the other classifications.
Threshold and alarm reporting is done.
I think it shall be good if we take some action upon this
Regards
Thanveer
Please rate if the post is helpful

CRC errors with non-home hub device

Hey folks
When I first replaced my dying BT Home Hub with a third party DSL modem, there were initially a lot of CRC errors and poor SNR ratios. I called BT Broadband support and the agent appeared to rectify the problem on by undertaking actions on BT's side. It was something like performing two line tests back-to-back -- I know sounds odd, but it worked and the the third party DSL modem worked happily for 6 months.
This week the third party modem started reporting high numbers of CRC errors, much like when first connected, it works for a while then resets when the CRC error count overflows. I'm wondering if there is some other state on BT's side that could rectify the problem. I've spoke with two agents this week, and they had no idea what I was talking about (and I agree it sounds like voodoo).
Any ideas on what the initial action was on BT's side that enabled the modem to work in the first place?
Thanks
Solved!
Go to Solution.

Hi John
I didn't understand the question about the test socket (physical socket?).
The line passes the quiet line test.
The third party router shows:
        Downstream
Upstream
SNR Margin
0.1
6.2
db
Line Attenuation
53.5
27.0
db
Data Rate
5705
1023
Kbps
Max Rate
22116
1036
Kbps
POWER
0.0
12.3
dbm
CRC
5786
0
The CRC errors accumulate until they hit a threshold and the device resets dropping the connection.
The Home hub shows:
ADSL settings
VPI/VCI   0/38
Type   PPPoA
Modulation   ITU-T G.992.5
Latency type   Interleaved
Noise margin (Down/Up)   2.8 dB / 5.3 dB
Line attenuation (Down/Up)   49.5 dB / 26.1 dB
Output power (Down/Up)   0.0 dBm / 12.9 dBm
The obvious difference is 3dB in line attenuation and noise margin. This was the case when I first connected the third party router before BT did the line reset that allowed the device to work. It has worked flawlessly for months.
Thanks
BTW, I don't want to appear unduly ornery, but BT tech support repeatedly ask on the telephone "why aren't you using HH2 we provided?".
1) It randomly drops OS X wifi connections which makes me really unpopular in the house.
2) It has poor wifi interaction with work lenovo laptop.
3) It has no support for QoS provisioning so kids streaming video interferes with work.
4) It has unreliable and undocumented USB storage, cf third-party solution which offers glitchless SMB and FTP.
5) Printer support is undocumented (though works better than my third-party alternative :-) )
My first HomeHub 2 had exactly the same issues before it died at which time I invested in a third party alternative. To credit BT they sent a refurbished replacement but this has all the same issues and a non-functioning reset switch.

Why I get CRC error when copying outlook.ost file?

My workstation is using NTFS, Outlook 2007 with Exchange 2007 server.
My outlook.ost file is 1.7GB.
As my Outlook runs into problem, I tried to copy the outlook.ost file to another location for repair, but I keep getting CRC errors and the file was not copied.
I also tried to use winrar to compress it and it runs into the same CRC error.
Q#1. What causes this CRC error? hard disk error or software?
Q#2. How to repair such CRC error?
Thanks.

Hi Peter,
The cyclic redundancy check, or “CRC” error, indicates a bad spot/corruptions within the file that you are trying to copy and in lot of cases with your hard disk.
To make sure if the problem is with the .ost file or your hard disk, you can fire up a Command Prompt window, and then copy the file to NUL:
C:>CD (path of your .ost file)
C:(path of your .ost file)>copy name.ost NUL
If this succeeds, the problem is with your .ost file. If this fails, it should be a hardware based disk issues.
If it's an issue with your .ost file, I'd suggest to run
scanpst.exe tool to repair your data file, then check if this fixed it.
When the issue is hardware based, you probably need to find Disk Errors in the System log of your Event Viewer. You can access the Event Viewer by going to:
Control Panel-> Administrative Tools-> Event Viewer
By the way, .ost file is actually a local copy of your mail items on the server. For a corrupted .ost file, you actually don't need to "copy the outlook.ost file to another location for repair". You can simply rename it to .ost.old
or delete it, and then re-launch Outlook to let it generate a new .ost file from server.
Regards,
Ethan Hua
TechNet Community Support
It's recommended to download and install
Configuration Analyzer Tool (OffCAT), which is developed by Microsoft Support teams. Once the tool is installed, you can run it at any time to scan for hundreds of known issues in Office
programs.

What to do about error msg: Warning: SUID file "System/Library/Core/Services/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDA gent"has been modified and will not be repaired" on MacBook Air.

What to do about error msg in Disk Utility on MacBook Air:
Warning: SUID file “System/Library/Core/Services/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDA gent"has been modified and will not be repaired.”

As long as the report ends up with 'Permissions repair complete' then, as far as permissions go, you are fine. You can ignore the various statements in the report:
Permissions you can ignore on 10.5 onwards:
http://support.apple.com/kb/TS1448
Using 'should be -rw-r--r-- , they are lrw-r--r--' as an example, you will see the that the permissions are not changed, but the | indicates a different location. This is because an update to Leopard onwards changed the location of a number of system components.
Poster rccharles has provided this description of what it all means:
drwxrwxrwx
d = directory
r = read
w = write
x = executeable program
drwxrwxrwx
| | |
| | all other users not in first two types
| |
| group
|
owner

SMART utility says hardrive failing

Ran the utility after imac started running very slow. HD is failing, apparently.
power on hours 17040
temp: 33
pending bad sectors: 1
removed bad sectors: 1
reallocated bad sectors: 34
crc error count: 0
total errors: 5347
last error type: uncorrectable error
last error time: 17040
Is that all she wrote? Nothing to do but take her to the shop and replace the HD?
thanks
Pete

Correct,
Hope this helps

What does this actually mean and how do I fix it: Alert: Error Count Monitor Resolution state Object Hyper-V Virtual Storage Device Has a value

We are getting this alert on a fair few of our VMs with VHDXs and Dynamic VHDs. Everything seems OK but I am not sure what this actually means and what I need to do to resolve the issue. How do I reset the error count if that is what is required? Thanks
in advance.
Alert: Error Count Monitor Resolution state: New
Error Count Monitor Source: MyVm01 Path: MyHost.MyDomain.local;MyHost.MyDomain.local;FE71577B-A2E2-45C0-B757-2FBCEC9311DE Last modified by: System Last modified time: 2/9/2013 2:08:48 PM Alert description: Instance c:-clusterstorage-volume1-MyVm01-virtual
Sat 09/02
To:Administrator
09 February 2013 14:09
Alert: Error Count Monitor
Source: MyVm01
Path: MyHost.MyDomain.local;MyHost.MyDomain.local;FE71577B-A2E2-45C0-B757-2FBCEC9311DE
Last modified by: System
Last modified time: 2/9/2013 2:08:48 PM
Alert description: Instance c:-clusterstorage-volume1-MyVm01-virtual hard disks-MyVm01-DATA02.vhdx
            Object Hyper-V Virtual Storage Device
            Counter Error Count
            Has a value 9
            At time 2013-02-09T14:08:48.0000000+00:00
Darren

But I am getting this alert from SCOM and SCOM has no information about the alert for me to find out what to do - thought that was the point of SCOM to let you know of problems and how to resolve them. :)
The alert is coming from the Error Count Monitor that is part of the Hyper-V Management Pack Extensions (v 4.0.0.0)
I have tried looking in the Event Logs on the Host and there doesn't seem to be any storage related errors there. I am trying to establish if this is a false positive, why it is happening and if it is safe to override and ignore.
There is nothing on the Product Knowledge tab and nothing on the Alert Context other than what I have already mentioned (see below).
Thanks for responding.
Time Sampled:
09/02/2013 14:08:48
Object Name:
Hyper-V Virtual Storage Device
Counter Name:
Error Count
Instance Name:
c:-clusterstorage-volume1-myvm-virtual
hard disks-MyVM-DATA02.vhdx
Value:
9
Darren

10Gig (tengigabit) CRC Errors between N5K500 and 3750X

Dear Forum,
We have an issue with a 10 Gig connection between a Nexus 5548 and a 3750X 10Gig. There is also a HSRP group running over this link with aggressive timeouts which recently behaves somewhat unstable. We noticed a bunch of CRC errors on this link on the 3750X side (about 300 per hour) and assume that these are related to the HSRP troubles once or twice a day.
Originally the connection was made with a twinax cable. We already changed to MMF fiber with SR SFP+'s. The 10Gig Uplink Module in the 3750x has been replaced already. All to no avail. Now it's up to replace the 3750 (receives CRC) or the Nexus Chassis (sending device)
I was wondering if there is some experience on the list what is the most probably cause and solution here.
Thanks in advance,
Michael.

MTU is 1500 bytes, on both sides (I think) see output below. Strangely enough the NX has a non-zero Jumboframe counter (increasing).
C3750#sh int te3/1/1
TenGigabitEthernet3/1/1 is up, line protocol is up (connected)
Hardware is Ten Gigabit Ethernet, address is 4055.3992.111d (bia 4055.3992.111d)
Description: TO_100C_PO913
MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 2/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 10Gb/s, link type is auto, media type is SFP-10GBase-SR
Media-type configured as connector
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:55, output 00:00:41, output hang never
Last clearing of "show interface" counters 04:10:35
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 4011000 bits/sec, 1091 packets/sec
5 minute output rate 110431000 bits/sec, 16489 packets/sec
     37040147 packets input, 35868731879 bytes, 0 no buffer
     Received 1071851 broadcasts (935322 multicasts)
     0 runts, 0 giants, 0 throttles
     1002 input errors, 1002 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 935322 multicast, 0 pause input
     0 input packets with dribble condition detected
     182446795 packets output, 69097435882 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out
C3750#sh int te4/1/1
TenGigabitEthernet4/1/1 is up, line protocol is up (connected)
Hardware is Ten Gigabit Ethernet, address is 4055.39bd.001d (bia 4055.39bd.001d)
Description: TO_100D_PO913
MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 10Gb/s, link type is auto, media type is SFP-10GBase-SR
Media-type configured as connector
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:14, output 00:00:33, output hang never
Last clearing of "show interface" counters 04:10:38
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 161000 bits/sec, 215 packets/sec
5 minute output rate 29493000 bits/sec, 9580 packets/sec
     3264201 packets input, 318586322 bytes, 0 no buffer
     Received 1130048 broadcasts (1020339 multicasts)
     0 runts, 0 giants, 0 throttles
     501 input errors, 501 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 1020339 multicast, 0 pause input
     0 input packets with dribble condition detected
     168673910 packets output, 87266013753 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out
N5K connected to 3/1/1:
Ethernet1/1 is up
Hardware: 1000/10000 Ethernet, address: 0005.9b1f.8648 (bia 0005.9b1f.8648)
Description: CHANNEL_TO_RO015A
MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec
reliability 255/255, txload 1/255, rxload 3/255
Encapsulation ARPA
Port mode is trunk
full-duplex, 10 Gb/s, media type is 10G
Beacon is turned off
Input flow-control is off, output flow-control is off
Rate mode is dedicated
Switchport monitor is off
EtherType is 0x8100
Last link flapped 2d04h
Last clearing of "show interface" counters never
30 seconds input rate 96695496 bits/sec, 16464 packets/sec
30 seconds output rate 4715024 bits/sec, 1868 packets/sec
Load-Interval #2: 5 minute (300 seconds)
    input rate 148.33 Mbps, 20.23 Kpps; output rate 2.90 Mbps, 1.13 Kpps
RX
    26173471641 unicast packets 6446061938 multicast packets 24295222 broadcas
t packets
    32643828801 input packets 16853116460189 bytes
    7772805495 jumbo packets 0 storm suppression packets
    0 runts 0 giants 0 CRC 0 no buffer
    0 input error 0 short frame 0 overrun   0 underrun 0 ignored
    0 watchdog 0 bad etype drop 0 bad proto drop 0 if down drop
    0 input with dribble 0 input discard
    0 Rx pause
TX
    48369101239 unicast packets 462061134 multicast packets 81589744 broadcast
packets
    48912752123 output packets 56533126796163 bytes
    35421478216 jumbo packets
    6 output errors 0 collision 0 deferred 0 late collision
    0 lost carrier 0 no carrier 0 babble 0 output discard
    0 Tx pause
3 interface resets
N5K connected to 4/1/1:
Ethernet1/1 is up
Hardware: 1000/10000 Ethernet, address: 0005.9b1f.8188 (bia 0005.9b1f.8188)
Description: CHANNEL_TO_RO0015A
MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA
Port mode is trunk
full-duplex, 10 Gb/s, media type is 10G
Beacon is turned off
Input flow-control is off, output flow-control is off
Rate mode is dedicated
Switchport monitor is off
EtherType is 0x8100
Last link flapped 2d04h
Last clearing of "show interface" counters never
30 seconds input rate 20643816 bits/sec, 10541 packets/sec
30 seconds output rate 142592 bits/sec, 180 packets/sec
Load-Interval #2: 5 minute (300 seconds)
    input rate 25.50 Mbps, 9.49 Kpps; output rate 159.20 Kbps, 142 pps
RX
    119855915845 unicast packets 6017690609 multicast packets 20318382 broadca
st packets
    125893924837 input packets 124351081100162 bytes
    70763564145 jumbo packets 0 storm suppression packets
    0 runts 0 giants 1 CRC 0 no buffer
    1 input error 0 short frame 0 overrun   0 underrun 0 ignored
    0 watchdog 0 bad etype drop 0 bad proto drop 0 if down drop
    0 input with dribble 0 input discard
    0 Rx pause
TX
    20958491666 unicast packets 503446052 multicast packets 52796318 broadcast
packets
    21514734036 output packets 29748981423583 bytes
    18964491576 jumbo packets
    0 output errors 0 collision 0 deferred 0 late collision
    0 lost carrier 0 no carrier 0 babble 0 output discard
    0 Tx pause
3 interface resets

CRC ERROR ----- WHY ???-----

Hi all,
I am facing the crc error with some one switch... I did verifed the L1 (connections, power etc...) this are okay.
After of verify all this, I did a test disabling (disconnect cable) the port and clear the counters, but the port continuos the increase "CRC ERROR".
Someone Known why IS this happeing???
Probably thi problem on switch, but why????

It is still counting with the cable disconnected? Surreal!
The only thing I can think of is that it might be being used as a reflector port for an RSPAN session.
What model of switch is it? Can you show us a show run and a show int for the port?
Kevin Dorrell
Luxembourg

Read the transmit/receive error counter from CAN

I would like to read every packet that runs accross the CAN bus. I am in a situation where my Can Receive.vi is set to read any CAN bus errors, but I would like to see the entire can packet(including CRC values, DLC values, etc etc). Is there a way to do this? Any sample vi's out there?
Also, I'de like to read the status of the receive/transmit error counter on either side I assume. I am trying to see what my arbitration values hover around (less than 128, over 128, etc etc).
Thanks for any help.
Andre

Hi Andre
The NI CAN hardware does not have the ability to access the full raw CAN frame. This is because of the used CAN controller (Philips SJA 1000 on Series 2 CAN hardware) does which does not provide all of this information. However, the following data is provided:
Arbitration ID (11 or 29 bit)
Data Length (DLC)
Remote Frame Flag (RTR)
Data (0-8 byte)
As you are interested in the raw/unconverted CAN data, you should focus on the NI-CAN Frame API, as the NI-CAN Channel API tries to abstract these information.
With Series 2 CAN hardware, you have read access to the receive/transmit error counter. Take a look at the ncGetAttr function (Frame API) or the GetProperty function (Channel API) and query the ‘Series 2 Error/Arb Capture’ attribute or the ‘Interface Series 2 Error / Arb Capture’ property for that. You can find more details on how to read the returned data in the help for the two functions.
-B2k

Error counter

I am using IBM's websphere application developer to create a new java site. I have a login page that has username/password fields. I need to create a generic class that counts how many errors you get on a page and after for example 3 errors, you go to a customer service help page. We want it to be generic enough that you could use this class in any page for error counting.
I am new to the Java world.
Thanks for your help!!

Google: "java track login attempts"
Before asking a technical question by email, or in a newsgroup, or on a website chat board, do the following:
Try to find an answer by searching the Web.
Try to find an answer by reading the manual.
Try to find an answer by reading a FAQ.
Try to find an answer by inspection or experimentation.
Try to find an answer by asking a skilled friend.
If you are a programmer, try to find an answer by reading the source code.
When you ask your question, display the fact that you have done these things first; this will help establish that you're not being a lazy sponge and wasting people's time. Better yet, display what you have learned from doing these things. We like answering questions for people who have demonstrated that they can learn from the answers.
From How To Ask Questions The Smart Way by Eric Steven Raymond
Here are some great resources to help you get started.
http://java.sun.com/docs/books/tutorial/
http://java.sun.com/developer/onlineTraining/Programming/BasicJava1/compile.html
http://java.sun.com/learning/new2java/index.html
http://javaalmanac.com
http://www.jguru.com
http://www.javaranch.com
Bruce Eckel's Thinking in Java
Joshua Bloch's Effective Java
Bert Bates and Kathy Sierra's Head First Java

What's with disk errors that disappear, sort of?

1. MB started running slow. Activity monitor showed high CPU use when nothing was running.
2. Ran Disk Utility and it reported unfixable errors. Suggested wiping, reinstalling o/s and restoring from Time Machine
3. MB would then not boot.
4. Time passed with MB turned off. Could not get an appointment at the Genius Bar.
5. Ran TechTool hardware diagnostic that reported problems on the hard disk
6. Booted holding Command+R
7. Boot succeeded. (Ran a Time Machine backup to capture the latest.)
8. Shutdown and restarted
9. Succeeded
10. Shut down and booted from Recovery Partition
11. Ran disk utility diagnostic.
12. No Verify errors, no Permission errors.
13. Ran TechTool again. Volumne Structure test failed.
14. TechTool said Volume Structure Rebuild could not be completed.
15. Rebooted normally with no problem.
What the @%#$ is going on?

You might want to run the Apple hardware test to see what it says: http://support.apple.com/kb/HT1509
Download Smart Utility from http://www.volitans-software.com/smart_utility.php and see what it says about the health of the drive. It will also give you visibility to the SMART sensor values.
The preceding two steps are to try and verify that the hardware is in good shape. Sometimes, though, if a drive is sick, it can show differing symptoms. How old is your MBP?

What is a CRC Error Count in SMART Utility

Similar Messages

Maybe you are looking for