Disk Utilty Cannot See HD

I have been getting the 'flashing question mark' folder for a couple of days.
If, when I try and reinstall Tiger, Disk Utility cannot see my hard drive does it mean that my hard drive is dead??
I need to know before I decide on my next course of action.
imac G5 20; 1gig RAM; 160HD; airport; bluetooth keyboard & mouse; bose companion 3 speakers Mac OS X (10.4.8)

Andy Moore-
That is why the collective support group is here. We
feel your pain brother!
If you think about it, your hard drive is a
mechanical device that does see a lot of movement
during it's lifetime.
It may be only a computer, but it is such a sweet
computer (;>)
Luck-
-DaddyPaycheck
Thanks DaddyPaycheck. I do feel more cheerful now.
I hate to backtrack, but when I was trying to start the iMac up in Target mode earlier on, I was pretty sure I could hear what sounded like the hard disk's read/write heads clicking.
I don't want any false hope at this stage, but is that anything like a good sign?
imac G5 20; 1gig RAM; 160HD; airport; bluetooth keyboard & mouse; bose companion 3 speakers Mac OS X (10.4.8)
imac G5 20; 1gig RAM; 160HD; airport; bluetooth keyboard & mouse; bose companion 3 speakers Mac OS X (10.4.8)

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Create ASM Disk Groups cannot see Disk Path to select during installation

Hello Guys,
I am setting up 2 node RAC on 11gR2 and Linux.
I have configured all the pre-installation steps that are required to run Grid Setup as per my understanding.
I have configure SAN partitions using multipath.
I can see my SAN volume when i query multipath -l
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/dev/oracleasm/disks/
CRSVOL1 DATAVOL1 FRAVOL1
Later on I created the disks using oracle asm command:
/usr/sbin/oracleasm createdisk CRSVOL1 /dev/mapper/racdbp1 and so on...
I have run /usr/sbin/oracleasm scandisks
Cleaning any stale ASM disks...
Scanning system for ASM disks...
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it shows the disk like this on both nodes:
CRSVOL1
DATAVOL1
FRAVOL1
BUT during the installation screen when it comes to create ASM Disk Groups It shows nothing in the add disk frame, I cant select the volumes I can list, like i did above.
Any hint please?
Thanks, Imran

Thanks but my problem is very specific. I feel that i have performed all the necessary steps to get complete the step i discussed above. As per different commands all is set. But i am unable to see Disks and Disks Paths during the installation screen. This is another output to verify if the installe user have rights on the asm devices:
[grid@racnode1 mapper]$ cd /dev/oracleasm/disks/
DATAVOL1 ETSCRS1 ETSVOT1 ETSVOT3 FRAVOL1
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[grid@racnode1 mapper]$ cd /dev/oracleasm/disks/
[grid@racnode1 disks]$ ls -ltr
total 0
brw-rw---- 1 grid asmadmin 8, 1 Oct 2 16:47 ETSASM1
brw-rw---- 1 grid asmadmin 8, 5 Oct 2 16:47 DATAVOL1
brw-rw---- 1 grid asmadmin 8, 6 Oct 2 16:47 FRAVOL1
brw-rw---- 1 grid asmadmin 8, 7 Oct 2 16:47 ETSVOT1
brw-rw---- 1 grid asmadmin 8, 8 Oct 2 16:47 ETSVOT2
brw-rw---- 1 grid asmadmin 8, 9 Oct 2 16:47 ETSVOT3
brw-rw---- 1 grid asmadmin 8, 10 Oct 2 16:47 ETSCRS1
brw-rw---- 1 grid asmadmin 8, 11 Oct 2 16:47 ETSCRS2
brw-rw---- 1 grid asmadmin 8, 13 Oct 2 16:47 EXTRADM
I will appreciate if you can help me to get through this step... Is there anything else needs to be verified?
Regards, Imran

Cannot see EMC PowerPath devices from ASM instance on Solaris 10 x86

Hello,
I'm trying to use EMC PowerPath devices as ASM disks, but cannot see any usable disk
from the ASM instance.
My configuration:
Hardware: Sun X4600M2
Solaris 10 8/07 x86_64
EMC PowerPath 5.0.2_b030
Oracle 10.2.0.1.0
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I've just read some recommendations of using slice 6 of the disk with partition type 'usr', but
this seems to me quite superficial. I would like to use simply slice (=partition) 0 starting from
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I would be very glad for any solution.
Best regards
Udo

Problem solved.
After some tests with plain files instead of devices via undocumented parameter
asmallow_only_raw_disks=false in order to check ASM functionality,
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original EMC PowerPath pseudo devices (e.g.):
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crw------- 1 root sys 215, 832 Dec 10 15:29 /devices/pseudo/emcp@13:a,raw
corresponding new character device with proper ownership and permissions:
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crw-rw---- 1 oracle dba 215, 832 Dec 10 14:56 /u01/app/ora-dev/raw/emcp13a
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I was able to see the devices via select * from v$asm_disk and could create the
ASM diskgroups.
Regards
Udo

Cannot see my shared USB hard disk's connected on my Mac-mini on my Macbook

As you all can see, I'm a Mac user since 1989, i've don't like working on a windows-computer.
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Hi WillemH777-NL and welcome to the discussion forums.
On the MacMini open system preferences-->sharing
then select 'File Sharing' from the Service column. Then under Shared Folders make sure your 2 usb drives are listed, if not click the + sign and add them.
then click the 'options' button
make sure Share files and folders using AFP is checked
make sure Share file and folders using SMB is checked
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then click Done
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AEBS cannot see both disks in 2 disk enclosure set to JBOD

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I get an error saying there is a problem with the disk, connect it to the computer directly and run Disk Utility to check for errors. So I do this every time and it returns no errors. Both disks can be mounted no problem if connected directly to the computer. But if I unplug it from the computer and plug it back into into the AEBS it stops working again.
I have this same problem with my HTPC Mac Mini 2.1 (C2D 2/0Ghz). I tried connection it with the same config and got the same problem, only one disk shows of the two in the enclosure.
Is there anything I could do to resolve this? I have searched high and low for a direct answer, but only see confusing responses and nothing direct on point. I apologize if this is a common issue.
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UPDATE: I read some tips on other related issues, and so I tried connecting a POWERED USB HUB (a Targus brand 4 port AC powered USB hub I had lying around) to the AEBS and then the external enclosure to the hub.
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If you are unable to resolve the problem contact your system administrator."
When dismissed this is followed byt eh additional error message:
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On Win 7, I now cannot see the AEBS at all, and neither disk is visible.
*sigh*
Back to square one......
SECOND UPDATE: Connected a USB thumb drive to the Powered HUB and it shows up fine. So now I am just totally confused.

Moving TM disk from Network to USB: cannot see previous backups

Hi,
I have decided to move my external USB disk from the Airport Extreme USB port to my computer USB port to speed up backups and restores.
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So, what I have done is to move back the disk to my computer, I have run disk utility to check and fix the disk since when the drive is attached to the AE with user privileges, it will report errors once you connect back to the computer. Once that permission errors were addressed, I have moved the time machine backup to the disk root and I have told TM to use this new disk as backup location.
Then I have made a new backup to the disk and it seems that TM was able to detect the previous backups because it has added only few GB to the backup.
Then I have moved to a random folder were I have made changes, and I have started TM: when I do that, TM window will switch me back to "MyComputer" where I can see all drives.
I can move around but I am unable to move back in time, like there are no other backups.
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I have not changed computer name,
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thanks!

Thanks for the replies,
I would like to move from a wired network TM backup to a local firewire/USB backup.
So the first error I have made is to have deleted the user directory in the Airport Extreme external USB disk: I have moved the TM sparse bundle file to the new location but I didn't noticed that other hidden files were there.
Second, I was unable to browse the older TM backups using TM and it seems that I cannot "browse other TM backups" using such TM option because the window were not showing me any drive.
I have then realized that I have to mount the sparse bundle to see it in such TM option: then it seems to work perfectly.
So there is no need for me to find a solution to use again the same backup with the local disk: if I need something in future I will use the TM option to browse other backups and I think I will be able to recover any file from there. May be I cannot recover mails in this way.
I think it is also possible to fix by using the procedure listed in the previous link: I didn't try just because I don't want to spend more time on this issue and because I have not enough free space on other drives... but...
...it should be enought to:
1- connect a new drive to the computer;
2- mount the old TM sparse bundle image;
3- use SuperDuper to copy all contents of mounted sparse bundle image into the new attached drive;
contents of the sparse bundle image seems to be equal to the structure and names used by a new fresh backup on a local USB disk, so I suppose that it could work... if someone wants to try a tell if it is so... thanks!

I cannot see all the data in target disk mode

I have an issue where my MacBook pro is not booting into the Yosemite. I see the progress bar hangs at about 45% on the startup screen. I called Apple support and they asked to use the target disk mode to connect to my mac and then copy data like that. I am using the same technique but I am not seeing all the data under users. My data under the folder users had another users data that I cannot see.
How can I see my data for all the other users? Help please!!!

Could be that the the data or directors on the HD are corrupted.
- Copy all data you can
- Try cloning the whole disk to another disk before you attempt recovery methods.
- Try repairing the HD via Disk Utility
- Try a data recovery program
http://data-recovery-software-review.toptenreviews.com/mac-recovery-software/

I have upgraded my OS into Mountain Lion and now I cannot see any net storage disks. may someone help me? thanks

I have upgraded my OS into Mountain Lion and now I cannot see any net storage disks. may someone help me? thanks

Hi kiwirudy,
I've had the same problem more than once since I started trying to download my 14 April purchase of OS X Mountain Lion.
I found a property list called manifest.plist in my ~/Library/Application Support/AppStore folder which had a Boolean property called failed checked. I unchecked it and afterwards I was able to resume my download.
Here are some steps I've found useful:
Close the Mac App Store.
make a copy of the ~/Library/Application Support/AppStore folder. For some strange reason the Mac App Store likes to just delete it in some circumstances, which will mean that one has to start one's download again from the very beginning.
Double click on the manifest.plist in one's ~/Library/Application Support/AppStore folder.
This should open it in Property List Editor.
Expand all the nodes (holding down the alt key and clicking on the highest collapsed node should do it.
Find a key called failed of type Boolean and uncheck it.
Save the manifest.plist and close it.
Open the Mac App Store.
The red message "an error has occured" should now be gone and one should be able to resume one's download.
In the event that the ~/Library/Application Support/AppStore folder gets deleted:
start the download again (it will start from the beginning), pause it and close the Mac App Store.
copy your backup copy of the pkg file back to its sub-folder (it's a numbered folder in the ~/Library/Application Support/AppStore folder).
Open the Mac App Store and resume your download.
It should continue from where it left off.
This has worked for me so far. I'm holding my breath. Don't know if I'll still be alive when it's finished.
Regards
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Message was edited by: n c h

Cannot see more than one shared virtual disk at a time

I have multiple virtual disks configured and as I add them to the specific virtual machine im using it modifies the vm.cfg as follows:
disk = ['file:/OVS/running_pool/110_openfiler/System.img,hda,w',
',hdc:cdrom,r',
'file:/OVS/sharedDisk/openfiler-ocs-u01.img,hdd,w!',
'file:/OVS/sharedDisk/openfiler-ocs-u02.img,hde,w!',
'file:/OVS/sharedDisk/openfiler-SAN-test.img,hdf,w!',
when the machine boots up the contents of /dev only contains the shared drive hdd, thus I cannot see hde or hdf.
One thing I tried was to edit the vm.cfg after adding the shared drives to the machine to mimic:
disk = ['file:/OVS/running_pool/110_openfiler/System.img,hda,w',
',hdc:cdrom,r',
'file:/OVS/sharedDisk/openfiler-ocs-u01.img,sda,w!',
'file:/OVS/sharedDisk/openfiler-ocs-u02.img,sdb,w!',
'file:/OVS/sharedDisk/openfiler-SAN-test.img,sdc,w!',
This allows me to see all three drives when I issue fdisk -l
Disk /dev/hda: 105.2 GB, 105226698752 bytes
255 heads, 63 sectors/track, 12793 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hda1 * 1 13 104391 83 Linux
/dev/hda2 14 12539 100615095 83 Linux
/dev/hda3 12540 12793 2040255 82 Linux swap / Solaris
Disk /dev/sda: 20.9 GB, 20971520512 bytes
255 heads, 63 sectors/track, 2549 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 1 2550 20480000 ee EFI GPT
Disk /dev/sdb: 20.9 GB, 20972569088 bytes
255 heads, 63 sectors/track, 2549 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 2550 20481024 ee EFI GPT
Disk /dev/sdc: 104.8 GB, 104857600512 bytes
255 heads, 63 sectors/track, 12748 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdc1 1 12749 102400000 ee EFI GPT
but then my question becomes... could this cause any potential problems?

I found that there are 4 IDE disks and 7 SCSI disks at most for HVM guest on Oracle VM 2.1 version. For IDE disks, The available disknames are from hda to hdd; and for SCSI disks, are from sda to sdg. you may make test about it. :)
Message was edited by:
Changhai

Cannot see encrypted disk image in ML

I created an encrypted disk image (password protected folder) through Disk Utility in Snow Leopard. However, now that I have upgraded to Mountain Lion, that folder appears to have vanished or is invisible. All my other file are intact but I just cannot see this encrypted folder anymore.
Anyone else having the same experience or able to offer some pointers?
Thanks,
Peter

There would be no reason for Mountain Lion to hide it. That's not normal behavior. Mountain Lion follows the same rules in this regard that Snow Leopard did. But, you can certainly check to see if it has somehow become accidentally hidden by entering the following command into the Terminal (but don't press return yet):
ls -al
Make sure there's a space at the end, and then drag the folder in which the .dmg file used to reside onto the Terminal window. This will enter the path to that folder in the command. Now switch back to the Terminal and press return. Do you see the .dmg file in the listing? If so, copy and paste the Terminal output into a message here, and I can give you a command that will show that file again.
If it's not there, it must have been accidentally deleted. (Again, not normal behavior, so most likely either it was accidentally deleted by you or someone else who uses that machine or the hard drive is badly corrupt and files are going missing.) Do you have a backup of that file?

HT1338 Attempt to install Mountain Lion has highlighted need for internal disk repair. Even after "repair" ML still says disk is damaged. Attempt to restore from Time Machine back-up failed - cannot 'see' internal HD to restore to. Help!

Attempt to install Mountain Lion has highlighted need for internal disk repair. Even after "repair" ML still says disk is damaged. Attempt to restore from Time Machine back-up failed - cannot 'see' internal HD to restore to. Help! Has attempt to install ML caused these problems or just highlighted existing need to Repair Disk? Even so, why can back-up from Time Machine not see the internal drive to restore to?

Csound1, William & Sig .... thanks for taking the trouble to reply. I fear you are right - I'll need a new disk. I'm booked in at the Apple Genius Bar in Bordeaux, France on Wed ... quite a challenge as my French isn't great! The current internal disk is 500gb, does anyone know whether I can upgrade my 21.5" iMac (circa Oct-2009 vintage) to a larger size internal disk, 1Tb or even 2Tb? I already have one external 2Tb drive and another one on order (I have masses of media stored and more planned as I've just taken up photography). Seems a bit of a pain managing with only 500gb internal storage. OR, can you advise me on how I can store all my photos on my new 2Tb external drive - I can't seem to figure out how to set the path for iPhoto to see them (I can't even figure out where they are stored right now!). Same with iTunes, how do I set the default storage to the external drive (I moved everything manually and then imported them all from the new drive - it worked but seemed very convoluted). Any advice on how to manage multiple drives gratefully received. And thanks again for previous replies.

IMac Finder cannot see external hard drive but Disk Utility can

I have a WD external hard drive and it has been attached to my iMac for a year or two. About two months ago I upgraded to Lion 10.7.5 and hard drive still worked. Then suddenly about a week ago the iMac no longer sees the external hard drive in Finder.
I have connected the hard drive to the iMac with different USB cables and into different ports and it makes no difference so deduce there is no issues with the cables or the ports. I have connected the hard drive to an old Macbook and it can see the harddrive and read some of the info but I really need the hard drive attached to the iMac as I store all my music and photos on the external hard drive.
I read another thread and someone asked if you can see the hard drive in Disk Utility. I tried this and Disk Utility can see the hard drive.
What does this mean? Any suggestions as to how to get the iMac to see the hard drive so I can access the data on it?
I dont really know how Disk Utility works therefore if that is any help to me.
thanks

Open the Finder.
From the Finder menu bar click Finder > Preferences then select the General tab.
Make sure: External disks is selected.

What can I do when I see "The backup disk image cannot be mounted"

I ran the time machine. Then, "preparing backup" showed up for a long time. After that, a window pop out: "Time machine error, The disk image cannot be mounted" What is disk image? What can I do (I can't back up anything)
P.S. I use time capsule for backup. there were no problem on connection

I suggest reposting in the TimeCapsule forum here:
http://discussions.apple.com/forum.jspa?forumID=1253
This may not be a TimeMachine problem at all but something else.

HT204350 I cannot see my TM disk

I cannot see the resources created by Time Machine on my external HDD...
Both systems are 10.9.1...
I am very disappointed.

We don't have enough information yet to know how to start the troubleshooting process.
1) Do you know if the drive is formatted in Mac OS Extended (Journaled) or FAT32?
The reason we ask is that the AirPort Extreme will only support drives that use one of the two formats mentioned above. Your computer supports more formats, so it's possible that your computer can "see" the drive, but the AirPort Extreme cannot.
2) What operating system are you using on your computer?
If you have a Mac, and do not know, click the Apple icon in the upper left corner of the screen, then click About This Mac. Post back with the OS X Version number that you see there.
3) Have you tried a powered USB hub with the hard drive at the AirPort Extreme?
The USB port on the AirPort is not a high powered USB port like you would find on a computer. Often, you need to use a powered USB hub with a drive connected to the AirPort Extreme......even if the hard drive has its own power supply

I bought an external hard drive in June (this yr) and it suddenly stopped appearing on the desktop. Disk Utility could see it. It wasn't the cord - now that I've tried that, the ext won't even turn on. I need that data off the drive BADLY! Help!!??

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If your external drive does not have an independent power supply, you may wish to consider a couple of lower-cost options before tossing the drive. Bus-powered drives have no external power source and must get all their power from the computer. They can exceed the computer's USB energy budget.
Cheapest option:
1 Meter USB 2.0 A to 5 Pin Mini B Cable - Auxiliary USB "Y" Power Design for external hard drives.
This gets power from two of the computers USB porst sna can provide enough power to wake up an under-performaing bus-powered drive.
If you don't have enough ports to use this, try the next cheapest option:
Newer Technology 7 Port Hi-Speed USB 2.0 Hub with Power Adapter for Mac & PC
Such a hub has a an independent power supply to make up for wahat the comptuer fails to provide.

Disk Utilty Cannot See HD

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