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TICKET ARCHIVE -> Partition Disc Is Not Mounting
gaboba - Jul 1, 2005 - 3:58 pm
My hard disc has 2 partitions, Last night I did a defragmentation, on the system partition everything is OK... but it seems that on the second partition the process never really completed and now the secondary disk is not mounting.
I ran disk utility from the Mac OSX (Panther) installation CD and tried to mount it from there but still not working.
Using Norton Disk Doctor I can see it, but can't examine it completely...it reports:
> an unknown error occurred that prevented Norton Disk Doctor from fully scanning this disk.
Also when using volume recovery I can see the disc is there somewhere and i was able to create and view a virtual disk.
My question is if there is some way I can make the disk run and mount from the beginning without formatting, or backup my 90GB archive....
If anyone knows, I will be very very thankful.
If any other extra information is needed for u to answer my question, please let me know. THANKS
I ran disk utility from the Mac OSX (Panther) installation CD and tried to mount it from there but still not working.
Using Norton Disk Doctor I can see it, but can't examine it completely...it reports:
> an unknown error occurred that prevented Norton Disk Doctor from fully scanning this disk.
Also when using volume recovery I can see the disc is there somewhere and i was able to create and view a virtual disk.
My question is if there is some way I can make the disk run and mount from the beginning without formatting, or backup my 90GB archive....
If anyone knows, I will be very very thankful.
If any other extra information is needed for u to answer my question, please let me know. THANKS
bicycle - Jul 2, 2005 - 5:33 pm
Hello. I'd like to ask a few questions to get some background:
Q1. For the sake of the information, how did the defragmentation process conclude on the second partition, if it did not complete?
Q2. Do you have a backup of the data on the damaged (second) partition?
Q3. Do you own a license to Disk Warrior?
Q4. How many partitions are there on this drive?
For the time being, don't let Norton Disk Doctor do anything. Many people are skeptical of it. To get started, lets try the following.
1. Open Terminal (it is in /Applications/Utilities).
2. Type the following precisely, and then hit the *Return* key.
diskutil list
If you have just two partitions on this drive (and no external drives connected), the output should contain about 12 lines and the last two should look like
9: Apple_HFS Macintosh 32.8 GB disk0s10
10: Apple_HFS Minimal 5.1 GB disk0s12
The last line shows the name of my second partition.
3. Now, because of these results, if I wanted to try to mount the second partition (called disk0s12 above, with the 0 being a zero) then I would type the following in the Terminal window and hit Return:
diskutil mount disk0s12
Do the same, except replace disk0s12 by whatever you get as a name for your second partition. You can probably tell by the stated size of the partition which one you're looking for.
The partition still might not mount. Whether it mounts or not, we'll try to use Apple's disk repair from Terminal.
4. From the results above (where my second partition is named disk0s12) I would type the following in the Terminal window and then hit Return:
diskutil repairvolume disk0s12
Do the same, except replace disk0s12 by whatever you get as a name for your second partition.
If diskutil claims to have successfully repaired your partition, it will probably then automatically mount it when it finishes.
5. However, sometimes the repair by diskutil will uncover other problems, so you should run your equivalent of the last line
diskutil repairvolume disk0s12
from Terminal again and again until diskutil reports no errors whatsoever.
Report back how this goes. Regardless of the outcome of these two items, I have some followup items to discuss with you.
Q1. For the sake of the information, how did the defragmentation process conclude on the second partition, if it did not complete?
Q2. Do you have a backup of the data on the damaged (second) partition?
Q3. Do you own a license to Disk Warrior?
Q4. How many partitions are there on this drive?
For the time being, don't let Norton Disk Doctor do anything. Many people are skeptical of it. To get started, lets try the following.
1. Open Terminal (it is in /Applications/Utilities).
2. Type the following precisely, and then hit the *Return* key.
diskutil list
If you have just two partitions on this drive (and no external drives connected), the output should contain about 12 lines and the last two should look like
9: Apple_HFS Macintosh 32.8 GB disk0s10
10: Apple_HFS Minimal 5.1 GB disk0s12
The last line shows the name of my second partition.
3. Now, because of these results, if I wanted to try to mount the second partition (called disk0s12 above, with the 0 being a zero) then I would type the following in the Terminal window and hit Return:
diskutil mount disk0s12
Do the same, except replace disk0s12 by whatever you get as a name for your second partition. You can probably tell by the stated size of the partition which one you're looking for.
The partition still might not mount. Whether it mounts or not, we'll try to use Apple's disk repair from Terminal.
4. From the results above (where my second partition is named disk0s12) I would type the following in the Terminal window and then hit Return:
diskutil repairvolume disk0s12
Do the same, except replace disk0s12 by whatever you get as a name for your second partition.
If diskutil claims to have successfully repaired your partition, it will probably then automatically mount it when it finishes.
5. However, sometimes the repair by diskutil will uncover other problems, so you should run your equivalent of the last line
diskutil repairvolume disk0s12
from Terminal again and again until diskutil reports no errors whatsoever.
Report back how this goes. Regardless of the outcome of these two items, I have some followup items to discuss with you.
gaboba - Jul 8, 2005 - 4:31 am
Don Ed,
Thanks a lot for the reply, by now my system seems to be working all right, i didn't had the chance to do what u told me to.... i think on my urge to have it fixed, didn't wait enough for your reply and used volume recovery to backup the data and to recover the unmounting disk... did i do wrong?
I really want to thank u for the excellent advise... i hope that now everything continues as it has...so far....
in case u are still wanting to know the answer to your questions...well, here they are...
Q1. For the sake of the information, how did the defragmentation process conclude on the second partition, if it did not complete?
>I started it manually on the second partition only after checking the first one.
Q2. Do you have a backup of the data on the damaged (second) partition?
> At that moment I did not... now I have...
Q3. Do you own a license to Disk Warrior?
> NO... Should I?
Q4. How many partitions are there on this drive?
> just two
Thanks a lot again Ed... and please...if u feel that I did wrong.. tell me...
If theres anything else u want to know, just ask please...
THANK YOU AGAIN!
Thanks a lot for the reply, by now my system seems to be working all right, i didn't had the chance to do what u told me to.... i think on my urge to have it fixed, didn't wait enough for your reply and used volume recovery to backup the data and to recover the unmounting disk... did i do wrong?
I really want to thank u for the excellent advise... i hope that now everything continues as it has...so far....
in case u are still wanting to know the answer to your questions...well, here they are...
Q1. For the sake of the information, how did the defragmentation process conclude on the second partition, if it did not complete?
>I started it manually on the second partition only after checking the first one.
Q2. Do you have a backup of the data on the damaged (second) partition?
> At that moment I did not... now I have...
Q3. Do you own a license to Disk Warrior?
> NO... Should I?
Q4. How many partitions are there on this drive?
> just two
Thanks a lot again Ed... and please...if u feel that I did wrong.. tell me...
If theres anything else u want to know, just ask please...
THANK YOU AGAIN!
bicycle - Jul 8, 2005 - 10:54 am
Hi Gabriel.
As long as you have all your data back and things are working, you did everything fine!
If you have an external drive, then the safest way to defragment is to clone everything off the volume onto another one using SuperDuper!, erase the original volume, and then to clone it back with SuperDuper!. [Before you do any erasing, you should be sure that the clone job is a good one.] Using defragmenters is risky as you now know.
As of Panther, OS X does some defragmenting of its own, if your volume has sufficient unfragmented free space left. For files no more than 20 MB in size, if they are fragmented, it will copy them and rewrite them as you use the file. Therefore it should be less necessary to defragment often or at all.
Here is where to find SuperDuper!
http://www.macupdate.com/info.php/id/13803
Here is one way to see how fragmented your drive/freespace is (roughly)
http://www.macupdate.com/info.php/id/18451
Now, your set fine anyway, because of the steps you took yourself. Good Job! That's how I learned too.
Take care,
Ed
As long as you have all your data back and things are working, you did everything fine!
If you have an external drive, then the safest way to defragment is to clone everything off the volume onto another one using SuperDuper!, erase the original volume, and then to clone it back with SuperDuper!. [Before you do any erasing, you should be sure that the clone job is a good one.] Using defragmenters is risky as you now know.
As of Panther, OS X does some defragmenting of its own, if your volume has sufficient unfragmented free space left. For files no more than 20 MB in size, if they are fragmented, it will copy them and rewrite them as you use the file. Therefore it should be less necessary to defragment often or at all.
Here is where to find SuperDuper!
http://www.macupdate.com/info.php/id/13803
Here is one way to see how fragmented your drive/freespace is (roughly)
http://www.macupdate.com/info.php/id/18451
Now, your set fine anyway, because of the steps you took yourself. Good Job! That's how I learned too.
Take care,
Ed
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