Data CD's won't Mount

I recently upgraded the RAM and operating system. Prior to upgrading, I had already noticed that CD's sometimes did not mount on the first try. After upgrading, it seems that data CD's mostly won't mount, audio CD's mostly mount, and DVD's mount.
Now, I don't use my CD drive all that much, so I don't know if this has something to do with the upgrade or whether it's just a coincidence. Here's what I've tried so far without success...
1) Repaired Permissions.
2) Repaired Disk from Install disc. Message indicated that no repairs were necessary.
3) Downloaded and re-installed Mac OS X 10.4.8 Combo Update (PPC), and repaired Permissions.
4) Tried a Safe Boot.
5) Tried booting FirmWare (AppleOption+OF), and entering the following commands:
set-defaults (hit return)
reset-all (hit return)
6) Verified RAM specifications.
7) Ran the Apple Hardware Test. All components passed.
Anyone have any ideas? Or do you think the drive needs replacing?
Thanks!

Are any commercial pressed CDs other than the Office
disc causing problems?
I just tried a number of commercially pressed CD's without a problem. These included 4 of the OS X Jaguar 10.2 CD's, Logitech, Lexmark, and Norton AntiVirus. I also tried an audio CD and had no problem. However, when I tried a data CD (Verbatim CD-R), it wouldn't load.
It's possible that the Office
disc is itself defective (MS should be willing to
replace it if it won't mount in any other Macs)...
That's great! I'll have to see if I can find someone with a Mac so that I can test the disc.
There are some CD-R/DVD-R stoarge tips at the NIST's
Care and Handling of CDs and
DVDs...
That's great! I'll check it out...
... although the single biggest step you can
take to ensure long CD-R life if to find high-quality
blank discs to use in the first place.
Which ones do you recommend?
Let us know about other commercial discs and if the
lens cleaner helps.
I didn't get a chance to buy the lens cleaner today, but I should be able to buy one tomorrow. I'll definitely let you know whether it helps.
Thanks for your help, JMVP!
Cheers!
eMac Mac OS X (10.4.8) 640 MB, 700 MHz PowerPC G4

Similar Messages

External drive stuck in limbo - no errors, data intact, still won't mount?

Background story:
-I had an external enclosure with two drives (one Hitachi, one WD, both SATA) running seperately inside as storage. Things were good.
One day something went wrong, because I turned it on and weird clicking could be heard and the drives wouldn't mount. I tried them in another enclosure I had lying around (that was apparently borked too), panicked and brought the drives to a data recovery center.
The next day, the recovery center called me to let me know that they were able to read data off both drives and that scans showed no problems. I picked them up (and since I was already in Akihabara I bought the supplies needed to build a RAID5 bay that I've been planning for a while), got a new enclosure for them, went home.
I put both drives in the new enclosure and flipped the switch: the Hitatchi mounts just fine, but the WD doesn't mount. The drive and its partition show up in Disk Utility, but the partition name is grayed out. When I click the 'Mount' button, I get the following message:
*Mount Failed*
The disk "Photos" could not be mounted.
Try running First Aid on the disk and then retry mounting.
I then click "Verify Disk" and the following comes up:
*Verifying Volume "Photos"*
Checking Journaled HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Checking multi-linked files.
Checking Catalog hierarchy.
Checking Extended Attributes file.
Checking volume bitmap.
Checking volume information.
+The volume Photos appears to be OK.+
The plot thickens! After some fiddling around I discover that I can make a disk image out of this unmounted partition and proceed to copy it into my shiny new 2.7TB RAID5 unit. A few hours later, I have a 600GB .dmg, which pretty much corresponds to how much data I had on that drive. When I try to mount it?
+The following disk images failed to mount: Photos.dmg (no mountable file systems)+
I'm really at a loss, here. I'd rather not pay a data center to back everything up and I suppose I could bring it all to the Apple Store, but again that seems like a waste of time. Is there any way I can get my computer to mount this drive?

Josh
Sadly, I offer no help, only commiseration and another problem. I too had the big checkmark, for similar reasons. If you want, see my posts in iPod usage-"Restore won't restore." However, I did get past the checkmark eventually (I think by running update several more times, then saying no to the last one).
Now I have a new dilemma. It seems mounted. I see it in iTunes. But when I drag songs to it, they just disappear! Poof.
I just ran Disk Utility, which also "sees" it but and it tells me, the disk ipod cannot be unmounted. This is getting very old.
noodle--head ...dis... gust...ED

External drive won't mount- which software is best for data recovery?

Hi,
My external OWC drive won't mount to the desktop. It is visible in Disc Utility, but can't be manually mounted from there. Verify and Repair disk functions state that the disk appears ok (log below):
Verify and Repair volume “OWC Mercury Elite AL Pro mini”
Checking Journaled HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Checking multi-linked files.
Checking Catalog hierarchy.
Checking Extended Attributes file.
Checking volume bitmap.
Checking volume information.
The volume OWC Mercury Elite AL Pro mini appears to be OK.
Drive lights up and spins. No weird sounds, just won't mount.
Not everything on the disc was backed up before the problem occurred. It's still under warranty with OWC, but I'd like to attempt to recover the data before sending it in for repair/replacement. The OWC tech on the phone said he's never seen this specific problem with this drive.
I'm thinking Data Rescue 3 would be the best software to try, but does anyone know of any other options to try first?
Thanks!

JohnDoe2009
I concur with the previous poster that if Disk Utility found no problems running TechTool Pro, Drive Genius or Disk Warrior might get it going. If you don't have any of those you could try
• Download and install Applejack
• Restart computer holding down Command + S
• When Command line comes up type in
+applejack AUTO+
Let is run all five functions.
In terms of Data Recovery
DataRescue 3
Virtual Lab
FileSalvage
are all excellent tools, and all offer a demo version.
Dr. Smoke's FAQ Data Recovery offers excellent tips on how to do it.
Good luck.
cornelius

I have a external back-up that my iMac (10.6.8) won't mount. Is there a way to mount without intializing and losing back-up data?

I have a external back-up that my iMac (10.6.8) won't mount. Is there a way to mount without intializing and losing back-up data? I used time machine to back-up to a Seagate Go-flex hard drive. I get a message from my iMac that says it doesn't recognize this drive and wants to initialize. Hope someone can help.

Try connecting the drive to a Windows machine, then ejecting. If it won't eject properly, restart the Windows machine, and try again. Then try connecting it to the Mac.

Urgent - I think I just lost everything on my MacBook Pro. Hard drive won't mount and booting up shows "no" symbol

My MacBook Pro (13" mid 2010, Yosemite) doesn't feel like booting up. It gives me the no symbol after the progress bar is about 1/4 of the way through.
Additionally, it won't mount in the Recovery HD. It shows up as disk0s6 and clicking Mount does nothing. Can't seem to mount it in the Terminal either.
The disk partition is encrypted, so unfortunately I can't pull the hard drive out of my MBP and pull the stuff off it with my PC.
I tried First Aid - "no problems found" (such LIES!)
I tried PRAM - didn't work
I tried Verbose Mode - went fine for the first minute, then hung for a while before returning to the "No" screen and in the bottom right corner "Still waiting for root drive".
I tried SMC - didn't work
Most recently I did install rEFInd - which is a boot manager. I was afraid it screwed up the EFI partition -seemingly not, as it will boot to Recovery and external drives.
The data still seems to be there, but the OS is having trouble accessing it.
Do you know what would be causing this? I really need that data back :/

It appears I can unlock the partition, using diskutil via the Terminal (diskutil coreStorage unlockVolume <UUID> -passphrase <passphrase>).
However the volume doesn't have a UUID. It lists the partition type as "FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF" (which is a UUID) but using that doesn't work.
Additionally when I use diskutil coreStorage list, it comes up with nothing. I'm at a loss here, the partition doesn't even know it's own UUID or that it's encrypted. It seems quite damaged to me but I don't have the slightest idea why, as I CAN boot to it and enter the password but it will stop at the "no" symbol part of the way along.

Upgraded to Mavericks. Now External HDD Enclosure Won't Mount. Is there a fix?

Upgraded to Mavericks. Now I can't get my external HDD enclosure to mount. A little about this enclosure, as it's not the usual settup . I have four 3TB HDDs in a RAID5 settup. The most unique part is that they are formatted as a Windows NT Filesystem (Tuxera NTFS). Basically, when I set this up, I had to get a lot of info from a Windows-formatted HDD, but also be able to read/write afterwards. It's worked fine for ~ 1 year, but now that I've upgraded to Mavericks, nothing will mount. I ran Disk Utility, where I see the HDDs (I've partitioned them into four drives of varying sizes), but they are greyed out. I tried to mount them, but it says it won't and that I should run First Aid. So I did...tried to "Repair Disk," but it just gets stuck on "Updating boot support partitions for the volume as required." For over an hour it's been on that message.
So, does anybody out there have a fix? I've read several similar posts about people having a hard time mounting and, overall, dealing with external HDDs after upgrading to Mavericks. But nothing seemed to fit my exact circumstances. Lastly, I should mention that I've used both Firewire and USB connections. Both resulted in the same.
Thanks.

I can't help with specifics for your issue, but some general thoughts:
The upgrade and the disk problem may be a coincidence. It would help you if you could verify that the drive still works fine on a windows machine. If you run a windows virtual machine or have a windows pc, or a friend does, verify full functioning that way. If it still won't mount on the mac, try to copy/backup it's data onto the windows machine (maybe another external drive connected to it. You could then scrub the disk in windows, leave it unpartitioned, unformatted. Connect it back to the mac and format it as HFS+ (Mac extended journalled) and transfer the data back to it by sharing the windows machine external drive and connecting the two machines with a network cable.

How do I erase and external HD that won't mount?

Help! I bought an Iomega eGo drive from Amazon. I backed up my MacBook Pro and my work on this drive. Now it won't mount and I want to send it back to Amazon. I tried disk utility, Disk Warrior and plugging it into other Macs. It has firewire 400 & 800 and usb. Nothing from all of them. How d I get my personal stuff off so I can return this hunk of junk? (my 2nd one! I never learn.)
Any help or ideas would be very much appreciated!
Thanks!

Just to add to the previous, if you use "System Profiler" (in your Utility Folder) and look under which ever interface you have it connected through, does the "bridge" in the enclosure itself at least appear, even if the drive itself doesn't? If it DOES, then the problem either lies with the drive or with its connection to external enclosure's "bridge". If even the "bridge"/ enclosure itself doesn't appear then the problem is either with the bridge/enclosure itself, the cable you are using, or the port you are using on the Mac (as the drive doesn't surface under any of three connection methods you can pretty much disregard the last two).
If the bridge is dead, then the only way you will be able to erase the drive is by removing it from the enclosure and putting it in another one (which will almost certainly void any warranty).
If the bridge appears, but the drive does not, then it is probably the drive itself which is dead, in which case you won't be able to erase it anyway, but no-one is likely to bother going through the expensive and time consuming process of seeing what is on it by removing platters etc! Most techs in the warranty departments of major companies like Iomega are overworked, underpaid, and trying to avoid additional work. They just won't be interested in the content. Dead drive, into the bin, onto the next one! As you say yourself, such failures with Iomega drives unfortunately aren't exactly worthy of headlines!
If Disk Utility can "see" it, though, even if it won't mount it, then there may be some other options for wiping data before sending it back.
Cheers
Rod

New partition on external hard drive won't mount

I have an 2TB external drive connected by FireWire to my 24-inch, Early 2009 iMac. I created 2 partitions 1 that is about 35 GB and another that is the rest of the 2TB. The 2nd largest partition mounts fine and is being used by Time Machine for my back up. The 2nd one I wanted to use for a Tech Tool Pro eDrive. However the 35 GB drive won't mount. Well it mounts, but after a few seconds it unmounts itself. This is the message I get as it unmounts itself:
8/18/13 7:18:45.788 PM fseventsd[43]: Events arrived for /Volumes/eDrive after an unmount request! Re-initializing.
8/18/13 7:18:45.789 PM fseventsd[43]: creating a dls for /Volumes/eDrive but it already has one...
8/18/13 7:18:46.039 PM fseventsd[43]: disk logger: failed to open output file /Volumes/eDrive/.fseventsd/00000000030d4f84 (No such file or directory). mount point /Volumes/eDrive/.fseventsd
8/18/13 7:18:46.039 PM fseventsd[43]: disk logger: failed to open output file /Volumes/eDrive/.fseventsd/00000000030d4f84 (No such file or directory). mount point /Volumes/eDrive/.fseventsd
Any ideas?
I've checked the partition with Disk Utility and no errors.
Regards,
Chris Johnson

If the drive has more than one interface (USB, FireWire, Thunderbolt, eSATA), try one of the other interfaces.
Check that the data cable is securely inserted at both ends.
Try a different cable.
If you're connecting the drive through a hub, connect it directly to a built-in port on the Mac.
If you're connecting it directly, try a different port.
Disconnect all other devices on the bus, or as many as possible.
Test the drive with another Mac. Test another drive with this Mac.
If the drive is bus-powered, but has an AC adapter, connect the adapter.
Boot into Recovery and launch Disk Utility. Does the volume mount?
Start up in Safe Mode and test.
If the drive doesn't work under any of the above conditions, and if another drive does work with the same Mac, then the drive has failed. You may be able to salvage the mechanism by removing it from the enclosure and installing it in another one, or in a drive dock.

External Hard Drive Won't Mount- Need to recover files

Hello Everyone,
I am hoping that one of you fine mac experts may be able to assist ~
Problem: External Seagate FreeAgent Desktop USB external hard drive
won't mount on desktop=ie: no access to my important files.. Please Help!
Details:
External seagate freeagent 500 GB Desktop USB HD ( only 2 months old)
(using for document / file backup-not as a startup disc)
on my Mac G3 350 MZ Blue & White Tower /768 ram/ running OSX 10.1.5 & OS9.2~
~
Problem: Started using the external 500 GB HD 2 months ago -with no problems-until this morning. Tried to double click to open it to access files
and got the "beach ball of death" and needed to restart.
My trusty G3 started up fine, however, the external HD was now
not showing up on the desktop as normal. I troubleshooted -by restarting,
trying different a/c plugs/ different USB ports , ran disk utility..called
seagate -not much help . Seagate said to try the HD on another mac-which I did-
a G5 tower- same problem.
~
The External hard drive will show up in disk utility, but is grayed out.
and when click "mount" same two messages keep showing:
message 1: "a disk attempting to mount as unknown has failed verification or has failed to
mount.please use disk utility to check the disk"
~
message 2- when unplugging and repluggin the usb in-and upon
restart:" you have inserted a disk containg no volumes that mac osx
can read to use unreadable volumes,click initialize to continue with the disk inserted ,click continue"
~
( I really need access to these files- and do not want to re-initialize the HD!!)
I ran Disk Utility /first aid "verify & repair , the following info came up:
Repairing disk "main backup 2007 ".
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Invalid key length ( <<<IN RED )
Repair completed. "
~~
Though it said the repair was completed, the "invalid key length" issue
still comes up when re-running disk utility...Hard drive would still not
mount on desktop-even after restarting .
~~~~~
If there is a mac genius out there that can help?- it would be greatly
appreciated. I have tried to call seagate several times in the last several hours-
1st time-they disconnected me after being on hold 10 minutes-2nd call
I was put on hold for 40 minutes ..Finally spoke to someone ( they are not mac users or mac experts!)and he said I would need to send it to Seagate's Data Recovery-... for a fee of course!
~~~
At this point, I am hoping to just get the files and photos off
the hard drive- I heard about Disk Warrior-should I use that and if so
what version?
Thank you very much!
L

Will zapping the PRAM be of any use in getting the external to mount on the desktop?
Your external Hard drive is already recognized. But it cannot be mounted on the desktop due to its directory damage. You can certainly Zap the PRAM, and it will not hurt anything, but I am skeptical that it will change the situation.
Do you think the Disk Warrior 4.0 cd will even work on my G3 350MHZ running Mac OS 10.1.5?
If you boot from the CD and run it from the CD, absolutely yes. If you attempt to INSTALL it from a download or a CD, probably not.
Have you ever used Disc Warrior and is using it complicated?
I own and use Disk Warrior. You select the drive to be rebuilt, it builds a proposed new directory from the information and file fragments available.
When complete, it will provide a list of problems encountered, tell you what files have been placed in the "Rescued Items" folder, and allow you too look at your drive using the proposed new directory. Your only decision is whether the new directory seems to be an improvement over the old \[in your case, hopelessly corrupted] directory. You then tell it whether to replace the old directory with the proposed new directory, or to abandon its work and leave your Hard Drive unchanged.
Is there a good chance that the ext HD will still have my files on it- or do you think from what I've described that they are gone ?
From what you have described, your files are very likely to still be there. Sometimes in a situation like this, a handful of files cannot be recovered.
My other thought was to take the external HD there and have them try to recover the files.
Make sure you completely understand the costs involved. File recovery using a service like DriveSavers can run into many hundreds of dollars. They are prepared to disassemble your drive in a clean room and replace controller boards and read/write heads to achieve success. Your drive has serious, but not fatal, Directory damage. The Hardware, and most of your files, are likely just fine.

External Hard Drive won't mount - tried Disk Warrior, am backing up as a .dmg...will this work?

Hi Guys,
Hopefully someone can help! Fairly desperate situation here...
I backed up around 700GB of data to an Iomega external hard drive (supplied by the client), using my Macbook Pro...all was fine when I unmounted the drive at the end of the backup.
The client took the drive away and called me to say he mounted the drive in Windows (on a PC), and he was able to work with the files for a time, but now the drive won't mount...
I collected the drive, hooked it up to my Mac Pro, but OSX tells me it can't mount the drive. It shows up in Disk Utility in the sidebar, but not on the desktop...
I tried repairing the disk using Disk Utility and with Disk Warrior, both tell me the disk cannot be repaired...
I am currently making a backup of the drive as a .dmg file, using a program called Disk Drill...it's slow as I expected, but I'm still not sure the .dmg will mount...because surely it's just making a copy of the data exactly, of which some part is not mounting (a mount directory or something???)
Is there any way you guys can think of me somehow taking the data and backing it up onto another disk?
Specialist recovery services seem to think there shouldn't be any problem recovering the data, and of couse, as a costly last resort, that's what I'll have to do, but does anyone know how they may go about doing it? It is something vastly complicated such as a command line thing?
Sorry about the length of this question...just hope someone can help!
Thanks in advance...

You didn't say what format (filesystem type) the disk was.
However, I'd say your analysis is probably correct. Something has corrupted the disk. You can make a disk image copy to the .dmg which will preserve the data, such as it is, but I doubt extremely if it will fix any file system corruption.
Furthermore, if both Disk Utility and Disk Warrior have said the disk is unreadable I'm dubious that anything else will magically repair it and that recovery probably consists of snuffling through the disk block by block.
However if the filesystem is FAT (Windows) there may be other (Windows) utilities that can fix it.
You said you 'backed up the data'. Does that mean you still have the original data on your MBP? Are you trying to recover the client's changes?

External Lacie drive won't mount

I have a older Lacie 160GB LaCie P3 extrenal drive that I can't mount. There never has been an issue with mounting it before in the method described below.
Here is what happened:
I turned the drive on but the firewire was not connected so I turned the Lacie drive off.
I connected the firewire and turned the Lacie on and the (partitioned) drive mounted on the desktop.
I was looking through the files when I got the error message that the drive was disconnected without being properly ejected which I didn't do.
I tried turning the Lacie drive off and on but it won't mount. I get the same flashing light on the Lacie drive that I had before connecting the firewire.
I tried Disk Utility but it can't see the drive.
I tried connecting to my laptop but it doesn't mount there either or show up in disk utility.
Questions:
Any idea how I can get it to mount?
Is there any risk of damage to the data by turning it on and off in an effort to get it to mount. I can hear it running.
Thank you

LIkely (very) your SATA card is fried inside the box for same.
External HD are very easy to diagnose. Bad USB cable (on commercial sold USB drives) almost doesn’t exist anymore.
External USB HD have 4 'parts' (not counting the HD internals)
1. USB cable (never an issue anymore, approaching 100%)
2. HD enclosure.....a plastic or metal box which cannot ever be an issue.
3. the HD itself
4. ....and last but not least is the epicenter of 'weak links' ,.....a SATA card/bridge that is connected to the HD inside the HD box, the size of a stick of gum, with SATA female on one side, and female USB on the other side, containing circuitry for data transfer between the SATA on the HD and to USB on the other.
While these bridge cards are better than they used to be, theyre still insanely unreliable.
There are literally probably MORE than 100,000 perfect external hard drives out there thrown away every year because people assume the "hard drive is bad" when really they could crack open the HD enclosure, remove the HD and put the good HD into a new enclosure.
See this video of the SATA CARD, its at 8:55min. http://www.youtube.com/watch?v=2pS_EDsP2KI
All conventional HD external are nearly 100% like the video above.
See pic below,..a (much larger) SATA card as found inside a typical HD enclosure ($20 ebay)
This is the nasty piece pictured below causing all the "crazy" activity seen on external HD, very odd behaviour, some have called it "haunted hard drive syndrome". Random ejects, random strange vanishing of the HD , especially in mid transfer of data.
the card attached to the TOP of the HD plugs in, that the SATA bridge

External HD's won't mount (& more) after update to 10.3.9

I updated from OS 10.3.2 to 10.3.9 using the Apple updater utility. After the update, external hard drives won't mount unless they are on when I boot up the computer.
Also music cd's won't mount, but data cd's do. The only way I can eject the music cd's is to shut the computer down or use Toast in copy mode. For some reason Toast can "see" the cd.
Also I was running Firefox 1.5.0.7 and Mozilla 1.7.13 when I updated. Now Firefox and Mozilla won't open. I had them in the dock and now clicking on them gets a question mark. I tried downloading Firefox 2. and when I double click the .dmg file I get a warning box saying that the disk image failed to mount because of "error 536870208". I get the same error message when I try and open the .dmg files for the older versions.
Do I need to wipe the hard drive and reinstall everthing? I hope not.
Thanks for any help,
John R

No. DVD's mount and work fine. Music cd's are the only ones that won't mount, and they don't get kicked out.They just sit in the machine. They are not damaged when I do get them out.

Hard Drive won't mount in Yosemite

I just updated to OS X Yosemite... as soon as I plugged in my external hard drive, I noticed it wouldn't mount (Toshiba Canvio 3.0, formatted mac os extended journaled). It will show up in disk utility but won't mount, and isn't solved running first aid. Was working fine the day before I updated.
I have around 800 gigs on this hard drive, most of it is essential photography and video files. I cannot wipe the drive, and I don't have space to create a disk image on my macbook. If I have to, I can buy a new drive.
Please Help!

I did everything right, formatting my 2T WD Passport to "journal" etc. at the same time I was upgrading both my MacPro and my iMac to Yosemite. So, I was sort of in-between OS.
At first, it worked fine. But the last Yosemite upgrade or patch or whatever blotted it out entirely. Can't find it anywhere or anyway and now I know I'm not the only one having this trouble.
I'm lucky-- I will lose no data if I reformat "in Yosemite as of 11/20/2014" and put all the data* I was saving on a second time, (although I wonder what would happen if Yosemite again mutates.)
*All I was doing was making a sort of backup and second drive for my laptop, so the data is all on my laptop.
Is the general consensus that WD peripheral hard drives DO work when set up as Mac journal in Yosemite? Or are solutions still inconsistent?
Am pretty sure I've seen WD Passports for sale in my Apple store. Please keep me in the loop-- this is actually my first day in the support forum and I'm troubled because I've found a lot of people are reporting similar problems,

External disc won't mount in Leopard, but will in Snow Leopard

I have a 5-yr-old G5 networked to a new iMac. I have had a 1-TB external HD attached via Firewire 400 to the G5 for about a year. Yesterday it didn't show up on the G5 desktop. I went to this forum, searched under "disc won't mount", got some ideas, ran DiskWarrior and Disk Utility...but nothing worked. They all said the disc was fine, directories rebuilt, etc., but it wouldn't mount. This AM it occurred to me that I had the correct cable, so I tried plugging it into the iMac instead. It worked. The data is safe, the disc shows up, everything seems to be OK, but it won't mount to the G5. Why would that happen, and how can I mount it to the G5? And how likely is the disc to remain accessible?

May I hop onto your thread as I have a similar problem.
I have a 5 year old G5 PMac with 10.5 onto which I have daisy chained two UltraMax 1TB firewire 800 drives. For the last 5 years I have been able, even with out sharing enabled, to connect to the G5 from a G4 Graphite with 10.4, a G4 Powerbook with 10.5 and now a MbP with 10.6.
After completing the login dialogue in the past from any other mac it would give me a list of the G5, it's Hard disk, user directories and the two Firewire Drives. On selecting them the drive would mount onto the desktop as a network drive. This went well until monday when it became temperamental in the morning and after a few restarts and one successful mount it has not shown up since. If I come to the G5 via the Go > Connect to Server I get a dialogue "Could Not connect to the server because the name or password are incorrect". If I try to connect via the network icon in the side window of the finder window I get a network dialogue log in, I get a list of folders and drives but then when selecting the FH drive get an error message which relates to the alias to the G5 Server requiring deleting or fixing.
Originally it just connected without any messing but now unless i make the firewire drive a shared drive the process on the other macs cannot see the firewire drive. NOTE - After having made the internal boot HD of the G5 shared, I can now see and mount this drive from the other macs but not the external drive.
This is causing me to pull my hair out, I have run disk utility, powered down unconnected and reconnected everything .The HD's appear to be working ok from the G5.
I urgently need to connect the FW drive to my G4 to do some work but it also needs to be connected to the G5, has anyone got a clue why I cant get G4 (or any other mac) to mount G5's external FW drive

External hard drive won't mount any more

I do a daily backup of the data on my internal HD to an external HD via FireWire. For some reason, the backup froze tonight - 10 minutes went by with no change in the progress. The only way I could get out of it was to quit everything, Force quit the ones that wouldn't respond, then reboot.
The internal HD is fine, but the external HD that I back up to won't mount now. I ran Disk Utility, and it sees the drive, but the Finder doesn't. In Disk Utility, if I click on "Verify Disk," I get this message:
Verifying volume “FireWire Disk”
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
The volume FireWire Disk needs to be repaired.
Volume check failed.
Error: The underlying task reported failure on exit (-9972)
1 volume checked
0 HFS volumes verified
1 volume failed verification
Does this mean I have lost everything on the external disk? What do I need to do to get that disk running and mounted again? There were other files on the external disk, besides the backup. There were some large video files that I will have to capture from tape again if they cannot be recovered.
Thank you for your help!

Cornelius,
Thank you for your reply. I was able to get out of the situation through luck. I read on another forum a post by someone in a similar situation, and they said that the drive would mount on a different Mac. So I tried plugging in the drive to my old iMac, and sure enough it mounted, although when Disk Utility was run, the same error message was given.
Fortunately I was able to copy the files I need from the drive to the iMac's internal drive. The copy worked even though there was obviously a problem with the external drive. Then I erased the external drive using Disk Utility, and copied the files back onto it.
So I'm back where I started, and I didn't lose any files that I really need. But it was pretty scary for a while - I thought I would have to re-do a lot of work. Fortunately I don't, but I realize how valuable it is to have a second backup in case the first one fails. I am now going to duplicate everything onto the iMac's drive until the project is finished and I can archive it all. I still don't know how the disk got so messed up, and I'm surprised that a disk can get corrupted so easily.

Data CD's won't Mount

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