Surface scan/test for bad blocks on hard disk?

Comming from the Windows world here... What is the recommended utility for this in OSX? Is TechTool Pro the way to go? Something else?
Thanks!

Thanks, I saw this software as well, however I do not see any mention of a surface scan feature on the website. Am I missing something?
Thanks.

Similar Messages

Disk Utility: for bad blocks on hard disks, are seven overwrites any more effective than a single pass of zeros?

In this topic I'm not interested in security or data remanence (for such things we can turn to e.g. Wilders Security Forums).
I'm interested solely in best practice approaches to dealing with bad blocks on hard disks.
I read potentially conflicting information. Examples:
… 7-way write (not just zero all, it does NOT do a reliable safe job mapping out bad blocks) …
— https://discussions.apple.com/message/8191915#8191915 (2008-09-29)
… In theory zero all might find weak or bad blocks but there are better tools …
— https://discussions.apple.com/message/11199777#11199777 (2010-03-09)
… substitution will happen on the first re-write with Zeroes. More passes just takes longer.
— https://discussions.apple.com/message/12414270#12414270 (2010-10-12)
For bad block purposes alone I can't imagine seven overwrites being any more effective than a single pass of zeros.
Please, can anyone elaborate?
Anecdotally, I did find that a Disk Utility single pass of zeros seemed to make good (good enough for a particular purpose) a disk that was previously unreliable (a disk drive that had been dropped).

@MrHoffman
As well pointed your answers are, you are not answering the original question, and regarding consumer device hard drives your answers are missleading.
Consumer device hard drives ONLY remap a bad sector on write. That means regardless how many spare capacity the drive has, it will NEVER remap the sector. That means you ALWAYS have a bad file containing a bad sector.
In other words YOU would throw away an otherwise fully functional drive. That might be reasonable in a big enterprise where it is cheaper to replace the drive and let the RAID system take care of it.
However on an iMac or MacBook (Pro) an ordinary user can not replace the drive himself, so on top of the drive costs he has to pay the repair bill (for a drive that likely STILL is in perfect shape, except for the one 'not yet' remaped bad block)
You simply miss the point that the drive can have still one million good reserve blocks, but will never remap the affected block in a particular email or particular song or particular calendar. So as soon as the file affected is READ the machine hangs, all other processes more or less hang at the same moment they try to perform I/O because the process trying to read the bad block is blocking in the kernal. This happens regardless how many free reserve blocks you have, as the bad block never gets reallocated, unless it is written to it. And your email program wont rewrite an email that is 4 years old for you ... because it is not programmed to realize a certain file needs to be rewritten to get rid of a bad block.
@Graham Perrin
You are similar stubborn in not realizing that your original question is awnsered.
A bad block gets remapped on write.
So obviously it happens at the first write.
How do you come to the strange idea that writing several times makes a difference? How do you come to the strange idea that the bytes you write make a difference? Suppose block 1234 is bad. And the blocks 100,000,000 to 100,000,999 are reserve blocks. When you write '********' to block 1234 the hard drive (firmware) will remap it to e.g. 100,000,101. All subsequent writes will go to the same NEW block. So why do you ask if doing it several times will 'improve' this? After all the awnsers here you should have realized: your question makes no sense as soon as you have understood how remapping works (is supposed to work). And no: it does not matter if you write a sequence od zeros, of '0's or of '1's or of 1s or of your social security number or just 'help me I'm hold prisoner in a software forum'.
I would try to find a software that finds which file is affected, then try to read the bad block until you in fact have read it (that works surprisngly often but may take any time from a few mins to hours) ... in other words you need a software that tries to read the file and copies it completely, so even the bad block is read (hopefully) successful. Then write the whole data to a new file and delete the old one (deleting will free the bad block and ar some later time something will be written there and cause a remap).
Writing zeros into the bad block basically only helps if you don't care that the affected file is corrupted afterwards. E.g. in case of a movie the player might crash after trying to display the affected area. E.g. if you know the affected file is a text file, it would make more sense to write a bunch of '-' signs, as they are readable while zero bytes are not (a text file is not supposed to contain zero bytes)
Hope that helped ;)

Mac pro 13'' harddisk makes noises when writing and reading data, but Techtool scanning result shows no bad blocks in the disk, that is normal?

I bought my Mac pro 13 inch, i7 processor and 750G storage 20th November 2012. But I found when copy into or out the Mac, the harddisk makes noises, like bitting something. I thought there are bad blocks in the disk, but the result of Techtool scanning is no bad blocks in disk, and giving a passed conclusion.
I went the apple store for testing, and the repairmen told me there are two choices available for me:1) replace the harddisk 2) back to the store i bought machine from for a new one. i think that the machine only bought few days, it had better not be disassembled, so i went back for a new one. unfortunately, the new one makes more noises than my old one. i don't know why like apple named brands notebooks have such problems. did you undergo this experience ?

All of the HDDs, be they in my MBPs or enclosures are barely audible. I would say the you deserve no less. I suggest that you do not leave until you are satisfied with a near silent HDD.
Why you got two in a row is a puzzle, but then some people beat the odds and win the lottery. In your case the results are not exactly positive. All HDDs eventually fail, and some fail sooner than others. At least you should start with a quiet one.
Good luck.
Ciao.

Mid 2007 24"imac test for bad capasitors

mid 2007 24" imac test for bad capasitors

I might recommend that you boot from your Original Installation Disk that came with your iMac and run the AHT (Apple Hardware Test) or the Extended Apple Hardware Test in order to check for hardware faults in your system. That may put your mind at rest.
Hope this helps

Is there any way to search for bad blocks in my Macintoshi HD without formating it? I'm experiencing too much I/O problems...

Is there any way to search for bad blocks in my Macintoshi HD without formating it? I'm experiencing too much I/O problems...

Check the drive health with the free demo of SMART Utility.
http://www.volitans-software.com/smart_utility.php
Reformatting and zeroing out might keep a drive going a bit longer, but once bad blocks become noticeable, it's not a drive you should trust any longer.

The finder window for an external USB hard disk suddenly started separating files by time (today, yesterday, etc.) and stopped allowing me to change column width, order, etc. Also the header bar shifted to flat white from gray.

The finder window for an external USB hard disk suddenly started separating files by time (today, yesterday, etc.) and stopped allowing me to change column width, order, etc. Also the header bar shifted to flat white from gray.
All was normal until the icon for the disk stopped showing up on the desktop when I would plug it in. I rebooted the computer, and the disk icon now shows up but this new look to the finder window started as a result. The hard disk does not have this problem when I use it on another Mac running Snow leopard. Also, two other external hard disks that I use on this computer running lion 7.4 still have the normal header bars with columns that can be reordered, etc.
I have tried looking in preferences and other places but have not seen this discussed.

Well duh - I finally figured out that somehow in the View options for the hard drive, the "arrange by" option had been changed to "by date" from "none". Not sure how that happened, I had never used the "view options" menu tem before. Changing "arrange by" back to "none" gets the gray column headers and the collapsible folder icons back.

Did primaryhard disk selt test and received #10008 replace hard disk 1 and then yes or no response

I have 2 issues with hp dv4-2049us did primaryhard disk selt test and received #10008 replace hard disk 1 and then yes or no response and my touchpad mouse is not working Iam using an external mouse and now the keyboard is not working please help

If the hard diskhas failed, there will be unusual things happening with hardware and operating system.
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

QuickTime movies cannot display properly, refresh doesn't work propely for html files on hard disk, opening a new tab doesn't work

Hi!
I have tried Firefox V4 (but have since reused V3.6.16). The following problems were found:
a. Cannot display the controls used for QuickTime movies.
b. The refresh button doesn't function at all if the html files reside on the hard disk. I do this because I need to test the appearance of the web page before uploading to the server.
This problem also exists for v3.6.14 to v3.6.16
c. When opening a new tab, it doesn't work. Instead, it will open another instance of the browser. By right, it has to open the web page on the same instance of the browser.
This is my feedback.
Thanks!!!!! :)

I had some advice to try recording QT audio and adding to the slide. Now, when recording to Quicktime, it does embed it, but in recording the presentation, it either doubles up the audio giving a strange echo or does the same thing if you ever edit the presentation.
The problem Keynote has is that the sound and image content are not locked together which causes out of sync errors. This is why many users choose video editing applications when using sound in the presentations, as they have both image and audio tracks to sync sound properly together.
Start a new presentation to remove the previous sound recording, Keynote is holding onto the other sound files.
Add the graphic items to each slide and one sound file to each slide for the voice over
1 - In Inspector > Transitions; use start transitions automatically and set each transitions delay to the duration of the individual sound file.
2 - In QT export, set Fixed Timing and delete the value in the duration box, QT will then use the custom timings for each individual slide.
This procedure does work exactly as needed, Iv used this for nearly 6 years using 4 different versions of Keynote.

Finder cannot searching for NTFS formatted external hard disk

MacBookAir,1.8GhZ,Memory 4GB1600 MHz DDR3
osx10.9.3
Finder can show and open the files from the external hard disk but can not searching for the files.

Barney-15E wrote:
Tuxera or paragon will give you write access, but I don't know if that will allow Spotlight to work on those drives.
A brief experiment suggests that Spotlight does not index an NTFS volume driven by Paragon NTFS. I don't have a copy of Tuxera to test.
Sorry, cchaikittiporn. Paragon does not seem to be a solution for your issue.

Unable to install Solaris 10 for intel on IDE hard disk?

I was trying to install solaris on an 80 GB IDE HDD with
AMD 32 bit ,XP2000 cpu, 1024 MB RAM using a DVD rom
drive with the first/second solaris os install CD.
BUT after 2nd CD , i got the message 'Short Read/Read Error'
after the GRUB boot loader screen.
Repeated after formatting disk using Red Hat linux (linux installed successfully on same disk/machine without problems) but even then
when i retried installing solaris 10, it failed with same error.
Same set of CDs installed successfully on intel xeon server with
1 GB RAM, 32 GB SCSI HDD.
Does solaris install on IDE hard disks on intel 32 bit PCs?
pl help/

Sometimes it's possible to use drivers for older Solaris x86 systems
to install the latest Solaris x86 release.
http://h18023.www1.hp.com/support/files/server/us/family/model/2543.html?submit.y=0&submit.x=0&lang=en&cc=us
To do that, you have to modify HP's ITU floppy. For Solaris 10 x86,
rename the DU/sol_2X directory on HP's floppy to DU/sol_210 .
See also:
http://forum.sun.com/thread.jspa?threadID=22200&messageID=68765

Permissons for new new iTunes Hard Disk

Can someone help me with permissions for a new hard disk for iTunes?
I'm trying to move my iTunes library onto a new hard disk that I just installed. However when I get to the step where I consolodate my library it fails returning the message: "the disk can not be read from or written to". Can anyone help me here please?
Thanks
Rick
Mac OS X (10.4.3) Dual 1.8 GHz PowerPC G5

Thanks for the reply. This is a new Hitachi internal 250Gb SATA hard drive. I connected the cables inside the Mac and booted it. The drive came up as unrecognised and Disk Utility started automagically. I clicked the option for a single partition and up it came on the desktop. I can copy files to it. My wifes acccount can not. My account is also the administrator? account.
Thanks for the help.
Rick

Hi everyone,How to check out that if there are bad blocks in a disk.

root@SER-DATABASE # dmesg
Thu Sep 8 17:00:09 CST 2011
Aug 11 03:10:01 SER-DATABASE syslogd: line 24: WARNING: loghost could not be resolved
Aug 15 16:59:58 SER-DATABASE su: [ID 810491 auth.crit] 'su root' failed for oracle on /dev/pts/5
Aug 18 03:10:01 SER-DATABASE syslogd: line 24: WARNING: loghost could not be resolved
Aug 25 03:10:01 SER-DATABASE syslogd: line 24: WARNING: loghost could not be resolved
Sep 1 03:10:01 SER-DATABASE syslogd: line 24: WARNING: loghost could not be resolved
Sep 2 16:51:24 SER-DATABASE su: [ID 810491 auth.crit] 'su root' failed for oracle on /dev/pts/5
Sep 2 16:53:07 SER-DATABASE last message repeated 2 times
Sep 4 16:21:53 SER-DATABASE scsi: [ID 107833 kern.warning] WARNING: /pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,21 (ssd2):
Sep 4 16:21:53 SER-DATABASE SCSI transport failed: reason 'timeout': retrying command
Sep 4 16:21:53 SER-DATABASE scsi: [ID 107833 kern.warning] WARNING: /pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,2a (ssd7):
Sep 4 16:21:53 SER-DATABASE SCSI transport failed: reason 'timeout': retrying command
Sep 7 11:37:33 SER-DATABASE scsi: [ID 107833 kern.warning] WARNING: /pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,21 (ssd2):
Sep 7 11:37:33 SER-DATABASE * SCSI transport failed: reason 'tran_err': retrying command*
Sep 7 11:38:32 SER-DATABASE scsi: [ID 107833 kern.warning] WARNING: /pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,22 (ssd1):
Sep 7 11:38:32 SER-DATABASE * SCSI transport failed: reason 'timeout': retrying command*
Sep 8 03:10:01 SER-DATABASE syslogd: line 24: WARNING: loghost could not be resolved
===============================================
#iostat -En
c0t1d0 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: SEAGATE Product: ST914602SSUN146G Revision: 0603 Serial No: 090498K0KV
Size: 146.80GB <146800115712 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c0t0d0 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: SEAGATE Product: ST914602SSUN146G Revision: 0603 Serial No: 090398LPZG
Size: 146.80GB <146800115712 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c0t3d0 Soft Errors: 2 Hard Errors: 1 Transport Errors: 0
Vendor: TEAC Product: DV-W28E-R Revision: M.0B Serial No:
Size: 0.00GB <0 bytes>
Media Error: 0 Device Not Ready: 1 No Device: 0 Recoverable: 0
Illegal Request: 2 Predictive Failure Analysis: 0
c1t5006048452A692A8d0 Soft Errors: 0 Hard Errors: 4 Transport Errors: 0
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 0.00GB <1966080 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 4 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c1t5006048452A692A8d34 Soft Errors: 0 Hard Errors: 5 Transport Errors: 3
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 97.52GB <97515601920 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 4 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c1t5006048452A692A8d33 Soft Errors: 0 Hard Errors: 7 Transport Errors: 3
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 97.52GB <97515601920 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 4 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c1t5006048452A692A8d32 Soft Errors: 0 Hard Errors: 5 Transport Errors: 6
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 97.52GB <97515601920 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 4 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c1t5006048452A692A8d6 Soft Errors: 0 Hard Errors: 2 Transport Errors: 0
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 0.00GB <1966080 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 2 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c1t5006048452A692A8d5 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 0.00GB <1966080 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c1t5006048452A692A8d43 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 97.52GB <97517568000 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c1t5006048452A692A8d42 Soft Errors: 0 Hard Errors: 0 Transport Errors: 1
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 97.52GB <97517568000 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c1t5006048452A692A8d41 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 97.52GB <97517568000 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c1t5006048452A692A8d40 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 97.52GB <97517568000 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c1t5006048452A692A8d39 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 97.52GB <97517568000 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c1t5006048452A692A8d38 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 97.52GB <97517568000 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c1t5006048452A692A8d37 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 97.52GB <97517568000 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c1t5006048452A692A8d36 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 97.52GB <97517568000 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c1t5006048452A692A8d35 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 97.52GB <97517568000 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
===================================================
# iostat -E | grep "Errors"
sd0 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
sd1 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
sd2 Soft Errors: 2 Hard Errors: 1 Transport Errors: 0
ssd0 Soft Errors: 0 Hard Errors: 3 Transport Errors: 0
ssd1 Soft Errors: 0 Hard Errors: 5 Transport Errors: 3
ssd2 Soft Errors: 0 Hard Errors: 7 Transport Errors: 3
ssd3 Soft Errors: 0 Hard Errors: 5 Transport Errors: 6
ssd4 Soft Errors: 0 Hard Errors: 2 Transport Errors: 0
ssd5 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
ssd6 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
ssd7 Soft Errors: 0 Hard Errors: 0 Transport Errors: 1
ssd8 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
ssd9 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
ssd10 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
ssd11 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
ssd12 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
ssd13 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
ssd14 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
==========================================
# format
Searching for disks...done
AVAILABLE DISK SELECTIONS:
0. c0t0d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@0,0
1. c0t1d0 <SUN146G cyl 14087 alt 2 hd 24 sec 848>
/pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@1,0
2. c1t5006048452A692A8d0 <EMC-SYMMETRIX-5771 cyl 1 alt 2 hd 15 sec 128>
/pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,0
3. c1t5006048452A692A8d5 <EMC-SYMMETRIX-5771 cyl 1 alt 2 hd 15 sec 128>
/pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,5
4. c1t5006048452A692A8d6 <EMC-SYMMETRIX-5771 cyl 1 alt 2 hd 15 sec 128>
/pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,6
5. c1t5006048452A692A8d32 <EMC-SYMMETRIX-5771 cyl 49598 alt 2 hd 30 sec 128>
/pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,20
6. c1t5006048452A692A8d33 <EMC-SYMMETRIX-5771 cyl 49598 alt 2 hd 30 sec 128>
/pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,21
7. c1t5006048452A692A8d34 <EMC-SYMMETRIX-5771 cyl 49598 alt 2 hd 30 sec 128>
/pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,22
8. c1t5006048452A692A8d35 <EMC-SYMMETRIX-5771 cyl 49598 alt 2 hd 30 sec 128>
/pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,23
9. c1t5006048452A692A8d36 <EMC-SYMMETRIX-5771 cyl 49598 alt 2 hd 30 sec 128>
/pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,24
10. c1t5006048452A692A8d37 <EMC-SYMMETRIX-5771 cyl 49598 alt 2 hd 30 sec 128>
/pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,25
11. c1t5006048452A692A8d38 <EMC-SYMMETRIX-5771 cyl 49598 alt 2 hd 30 sec 128>
/pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,26
12. c1t5006048452A692A8d39 <EMC-SYMMETRIX-5771 cyl 49598 alt 2 hd 30 sec 128>
/pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,27
13. c1t5006048452A692A8d40 <EMC-SYMMETRIX-5771 cyl 49598 alt 2 hd 30 sec 128>
/pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,28
14. c1t5006048452A692A8d41 <EMC-SYMMETRIX-5771 cyl 49598 alt 2 hd 30 sec 128>
/pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,29
15. c1t5006048452A692A8d42 <EMC-SYMMETRIX-5771 cyl 49598 alt 2 hd 30 sec 128>
/pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,2a
16. c1t5006048452A692A8d43 <EMC-SYMMETRIX-5771 cyl 49598 alt 2 hd 30 sec 128>
/pci@0,600000/pci@0/pci@9/SUNW,emlxs@0/fp@0,0/ssd@w5006048452a692a8,2b
There are some hard errors in some disks. the capacity of c1t5006048452A692A8d0 and c1t5006048452A692A8d6 is 0G.
#prtvtoc /dev/dsk/c1t5006048452A692A8d6
* /dev/rdsk/c1t5006048452A692A8d6s2 partition map
* Dimensions:
* 512 bytes/sector
* 128 sectors/track
* 15 tracks/cylinder
* 1920 sectors/cylinder
* 3 cylinders
* 1 accessible cylinders
* Flags:
* 1: unmountable
* 10: read-only
* First Sector Last
* Partition Tag Flags Sector Count Sector Mount Directory
2 5 01 0 1920 1919
6 4 00 0 1920 1919
Thank you for your help.

Thank you for your reply。
The Server is M5000.and the storage is EMC Stroage Array，I don't know the EMC Model type too。
In some case （different machine such as V880），when we use a command “iostat -En”，it would show that there are some hard errors。
but when we reboot the system，use "iostat -En" again 。the hard errors would be 0.
But ，This Machine （M5000），it is running the very important application and i can't reboot it。
Do you need a explorer data to analysis。
thank you for your help。
These disks shows that their capacity are 0 G.How can i to know if there are LUN or physical Disk。
ssd0 Soft Errors: 0 Hard Errors: 3 Transport Errors: 0
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 0.00GB <1966080 bytes>
ssd4 Soft Errors: 0 Hard Errors: 2 Transport Errors: 0
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 0.00GB <1966080 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 2 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
ssd5 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: EMC Product: SYMMETRIX Revision: 5771 Serial No:
Size: 0.00GB <1966080 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
root@EMOS3-DATABASE # vxprint -st
Disk group: datadg
SD NAME PLEX DISK DISKOFFS LENGTH [COL/]OFF DEVICE MODE
SV NAME PLEX VOLNAME NVOLLAYR LENGTH [COL/]OFF AM/NM MODE
SC NAME PLEX CACHE DISKOFFS LENGTH [COL/]OFF DEVICE MODE
sd datadg01-01 rdbsys-01 datadg01 0 2097152 0 EMC0_0 ENA
sd datadg01-02 rdbuser-01 datadg01 2097152 2097152 0 EMC0_0 ENA
sd datadg01-03 eoms_db1-01 datadg01 4194304 13981056 2/0 EMC0_0 ENA
sd datadg01-04 eoms_db2-01 datadg01 18175360 13981056 2/0 EMC0_0 ENA
sd datadg01-05 eoms_db3-01 datadg01 32156416 13981056 2/0 EMC0_0 ENA
sd datadg01-06 portal_db1-01 datadg01 46137472 13981056 2/0 EMC0_0 ENA
sd datadg01-07 rctl1-01 datadg01 60118528 524288 0 EMC0_0 ENA
sd datadg01-08 rdblog1-01 datadg01 60642816 1024000 0 EMC0_0 ENA
sd datadg01-09 rdblog2a-01 datadg01 61666816 1024000 0 EMC0_0 ENA
sd datadg01-10 rdblog3a-01 datadg01 62690816 1024000 0 EMC0_0 ENA
sd datadg01-11 eoms_db4-01 datadg01 63714816 13981056 2/0 EMC0_0 ENA
sd datadg01-12 eoms_db5-01 datadg01 77695872 10485760 3/0 EMC0_0 ENA
sd datadg01-13 eoms_db6-01 datadg01 88181632 10485760 3/0 EMC0_0 ENA
sd datadg01-14 eoms_db7-01 datadg01 98667392 10485760 3/0 EMC0_0 ENA
sd datadg01-15 eoms_db8-01 datadg01 109153152 10485760 3/0 EMC0_0 ENA
sd datadg01-16 eoms_db9-01 datadg01 119638912 10485760 3/0 EMC0_0 ENA
sd datadg01-17 eoms_db10-01 datadg01 130124672 10485760 3/0 EMC0_0 ENA
sd datadg02-01 rdbundo1-01 datadg02 0 2097152 0 EMC0_1 ENA
sd datadg02-02 eoms_db1-01 datadg02 2097152 13981056 0/0 EMC0_1 ENA
sd datadg02-03 eoms_db2-01 datadg02 16078208 13981056 0/0 EMC0_1 ENA
sd datadg02-04 eoms_db3-01 datadg02 30059264 13981056 0/0 EMC0_1 ENA
sd datadg02-05 portal_db1-01 datadg02 44040320 13981056 0/0 EMC0_1 ENA
sd datadg02-06 rdbtmp-01 datadg02 58021376 2097152 0 EMC0_1 ENA
sd datadg02-07 rctl2-01 datadg02 60118528 524288 0 EMC0_1 ENA
sd datadg02-08 rdblog2-01 datadg02 60642816 1024000 0 EMC0_1 ENA
sd datadg02-09 rdblog1a-01 datadg02 61666816 1024000 0 EMC0_1 ENA
sd datadg02-10 rdblog3b-01 datadg02 62690816 1024000 0 EMC0_1 ENA
sd datadg02-11 eoms_db5-01 datadg02 63714816 10485760 1/0 EMC0_1 ENA
sd datadg02-12 eoms_db6-01 datadg02 74200576 10485760 1/0 EMC0_1 ENA
sd datadg02-13 eoms_db7-01 datadg02 84686336 10485760 1/0 EMC0_1 ENA
sd datadg02-14 eoms_db8-01 datadg02 95172096 10485760 1/0 EMC0_1 ENA
sd datadg02-15 eoms_db9-01 datadg02 105657856 10485760 1/0 EMC0_1 ENA
sd datadg02-16 eoms_db10-01 datadg02 116143616 10485760 1/0 EMC0_1 ENA
sd datadg03-01 rdbsysaux-01 datadg03 0 2097152 0 EMC0_2 ENA
sd datadg03-02 eoms_db1-01 datadg03 2097152 13981056 1/0 EMC0_2 ENA
sd datadg03-03 eoms_db2-01 datadg03 16078208 13981056 1/0 EMC0_2 ENA
sd datadg03-04 eoms_db3-01 datadg03 30059264 13981056 1/0 EMC0_2 ENA
sd datadg03-05 portal_db1-01 datadg03 44040320 13981056 1/0 EMC0_2 ENA
sd datadg03-06 rctl3-01 datadg03 58021376 524288 0 EMC0_2 ENA
sd datadg03-07 rdblog3-01 datadg03 58545664 1024000 0 EMC0_2 ENA
sd datadg03-08 rdblog1b-01 datadg03 59569664 1024000 0 EMC0_2 ENA
sd datadg03-09 rdblog2b-01 datadg03 60593664 1024000 0 EMC0_2 ENA
sd datadg03-10 eoms_db4-01 datadg03 61617664 13981056 1/0 EMC0_2 ENA
sd datadg03-11 eoms_db5-01 datadg03 75598720 10485760 2/0 EMC0_2 ENA
sd datadg03-12 eoms_db6-01 datadg03 86084480 10485760 2/0 EMC0_2 ENA
sd datadg03-13 eoms_db7-01 datadg03 96570240 10485760 2/0 EMC0_2 ENA
sd datadg03-14 eoms_db8-01 datadg03 107056000 10485760 2/0 EMC0_2 ENA
sd datadg03-15 eoms_db9-01 datadg03 117541760 10485760 2/0 EMC0_2 ENA
sd datadg03-16 eoms_db10-01 datadg03 128027520 10485760 2/0 EMC0_2 ENA
sd datadg04-01 eoms_db4-01 datadg04 0 13981056 0/0 EMC0_3 ENA
sd datadg04-02 eoms_db5-01 datadg04 13981056 10485760 0/0 EMC0_3 ENA
sd datadg04-03 eoms_db6-01 datadg04 24466816 10485760 0/0 EMC0_3 ENA
sd datadg04-04 eoms_db7-01 datadg04 34952576 10485760 0/0 EMC0_3 ENA
sd datadg04-05 eoms_db8-01 datadg04 45438336 10485760 0/0 EMC0_3 ENA
sd datadg04-06 eoms_db9-01 datadg04 55924096 10485760 0/0 EMC0_3 ENA
sd datadg04-07 eoms_db10-01 datadg04 66409856 10485760 0/0 EMC0_3 ENA
sd datadg05-01 portal_db2-01 datadg05 0 83886080 0/0 EMC0_4 ENA
sd datadg06-01 portal_db2-01 datadg06 0 83886080 1/0 EMC0_5 ENA
sd datadg07-01 portal_db2-01 datadg07 0 83886080 2/0 EMC0_6 ENA
root@EMOS3-DATABASE # cfgadm -al
Ap_Id Type Receptacle Occupant Condition
SB0 System_Brd connected configured ok
SB0::cpu0 cpu connected configured ok
SB0::cpu1 cpu connected configured ok
SB0::cpu2 cpu connected configured ok
SB0::cpu3 cpu connected configured ok
SB0::memory memory connected configured ok
SB0::pci0 io connected configured ok
SB0::pci1 io connected configured ok
SB0::pci2 io connected configured ok
SB0::pci3 io connected configured ok
SB0::pci8 io connected configured ok
SB1 disconnected unconfigured unknown
SB2 disconnected unconfigured unknown
SB3 disconnected unconfigured unknown
SB4 disconnected unconfigured unknown
SB5 disconnected unconfigured unknown
SB6 disconnected unconfigured unknown
SB7 disconnected unconfigured unknown
SB8 disconnected unconfigured unknown
SB9 disconnected unconfigured unknown
SB10 disconnected unconfigured unknown
SB11 disconnected unconfigured unknown
SB12 disconnected unconfigured unknown
SB13 disconnected unconfigured unknown
SB14 disconnected unconfigured unknown
SB15 disconnected unconfigured unknown
c0 scsi-bus connected configured unknown
c0::dsk/c0t0d0 disk connected configured unknown
c0::dsk/c0t1d0 disk connected configured unknown
c0::dsk/c0t3d0 CD-ROM connected configured unknown
c0::sg/c0t0l0 unknown connected configured unknown
c0::sg/c0t1l0 unknown connected configured unknown
c0::sg/c0t3l0 unknown connected configured unknown
c1 fc-fabric connected configured unknown
c1::5006048452a692a8 disk connected configured unknown
c2 fc connected unconfigured unknown
iou#0-pci#0 unknown empty unconfigured unknown
iou#0-pci#1 fibre/hp connected configured ok
iou#0-pci#2 etherne/hp connected configured ok
iou#0-pci#3 fibre/hp connected configured ok
iou#0-pci#4 etherne/hp connected configured ok
root@EMOS3-DATABASE # df -h
Filesystem size used avail capacity Mounted on
/dev/md/dsk/d0 9.9G 5.4G 4.4G 56% /
/devices 0K 0K 0K 0% /devices
ctfs 0K 0K 0K 0% /system/contract
proc 0K 0K 0K 0% /proc
mnttab 0K 0K 0K 0% /etc/mnttab
swap 28G 1.9M 28G 1% /etc/svc/volatile
objfs 0K 0K 0K 0% /system/object
sharefs 0K 0K 0K 0% /etc/dfs/sharetab
/dev/md/dsk/d3 9.9G 3.8G 5.9G 40% /usr
fd 0K 0K 0K 0% /dev/fd
/dev/md/dsk/d4 20G 2.2G 17G 12% /var
swap 28G 3.1M 28G 1% /tmp
swap 28G 88K 28G 1% /var/run
swap 28G 0K 28G 0% /dev/vx/dmp
swap 28G 0K 28G 0% /dev/vx/rdmp
/dev/md/dsk/d5 59G 35G 24G 60% /opt
/dev/md/dsk/d6 9.9G 139M 9.6G 2% /export/home
/dev/vx/dsk/datadg/portal_db2
120G 93G 25G 79% /opt/attachment
/dev/vx/dsk/datadg/portal_db1
20G 16G 3.9G 81% /tempattachment

Is it a mistake for not upgrading the hard disk of new iMac to 1TB Fushion Drive

I have just bought a new iMac 27" in Fortress in HK for Video editing by Final Cut Pro X and Motion 5, may be After Effect later. I am thinking if I have made a mistake for not upgrading the driver to Fushion Drive. The followings are my spec:
Intel qual core-i7 3.4 GHz
16 GB RAM
1TB SATA
GTX 680 MX
Because my budget was within HKD 20,000, so I am considering if my decision for the upgrades were correct for video editing. To be honest, I really want to try Fushion Drive

I don't think it is a mistake. The Fuse Drive is a combination of both a Real SSD and a spinning mechanical hard drive. With that system if either drive fails you lose all your data.
There have been many articles on how to Make a Fuse drive, when there is both an SSD and Spinner installed in the system, and how to Break one up so you can use both drive independently, SSD and spinning drive as 2 separate drives.
The reason Apple came up with this system is for people that have no concept of how to use 2 separate disks in their systems. It allows them to still have the speed of a SSD along with the storage capacity of the large spinning hard drive without knowing how and where to store the data they have or may accumulate over the life of the system.
Also the way Apple want the user, almost Forces users, to store there files is in the User area that is located on the Boot drive. That will fill up a SSD very fast (depending on how much data the user or users have).
It does have overhead that will slow the system down compared to a system with independently accessed SSD and spinners.
Not sure what model iMac you bought as I didn't think the newest 27 inchers were out yet. But you should be able to add your own SSD so you can use it for the OS and program files and store your data on the mechanical, spinning, hard drive. And you can do that for much less them what Apple charges for a SSD. You could also combine them into a Fuse drive if you like. Just do a Google search for "Make Fuse Drive".

Lion server, time machine for clients on multiple hard disks

I'm trying to setup a macmini server with four different firewire drives (has this working in 10.6.8 working great) however in lion server you can only have ONE timemachine backup destination.
apple put an Share items/Backups folder with a .com.apple.timemachine.supported file in it. and set permissions to a group com.apple.backup_access
However i can't dublicate this setup and have the system accept an extra folder on another drive.
Anybody has any ideas to get this working ?

found the answer ;-)
https://discussions.apple.com/thread/3247301

How do I check for bad sectors on the hard drive? (Need help soon!)

I've asked this in a different thread but am not getting exactly the question answered completely. I need to run a check on my drive that will test each sector and if a bad sector is found, it will block that sector from being written to with data in the future.
I used to use Disk First Aid or Apple HD Setup or Norton Utilities to do this. Norton does not appear to be made for Mac OSX 10.4.4 and those other utilities appear to be System 9 and earlier utilities only.
Is there some way of doing this with current Apple tools? My original post is at http://discussions.apple.com/thread.jspa?messageID=1592160#1592160
Thank you. I've been down since Saturday and really need to get an answer so I can move forward and get my computer back up and running.

There is only one way to do this. Make a bootable backup of your drive to an external Firewire drive (you can use the Restore option of Disk Utility.) Then do the following:
1 Boot from your Tiger DVD. After the installer loads select Disk Utility from the Utilities.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
3. Set the number of partitions from the dropdown menu (use 1 partition unless you wish to make more.) Set the format type to Mac OS Extended (Journaled, if supported.) Click on the Partition button and wait until the volume(s) mount on the Desktop.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled, if supported.) Click on the Options button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process will take 30 minutes to an hour or more depending upon the drive size.
By reformatting using the Zero Data option DU will force checking for bad blocks.
If you wish to forego the above procedure you can purchase TechTool Pro (v. 4.1.1) which has a module for scanning the disk for bad blocks. However, repairing the drive can only be done by reformatting.

Surface scan/test for bad blocks on hard disk?

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