External SCSI RAID drives not mounting

I have an ATTO UL3D RAID that was working fine and I updated to the recommended 10.3.9 Apple update and now my drives are not mounting on the desktop. They show up in Disk Utility and I can initialize them, but I have some important data that I want to rescue. I followed all of the suggestions from ATTO but nothing. Can anyone please help? Thanks.
G5 Dual 1.8 Mac OS X (10.3.9)

Mine take a very very long time to mount then they will not sleep even when unmounted. The firewire driver in Mavericks needs some work. If at all possible, I would use USB until the driver get's resolved.

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Video Raid drive not mounting

All of a sudden our Video Raid drive will not mount. I turn on the drive, let it warm up for 30 seconds or so then power up the computer and it has always mounted. BUT now nothing. I've tried restarting several times.
The drive is a HUGE systems 2.3TB Video RAID U320.
It shows up in disk utility but the two "RAID slices" say offline.
Any advice or comments?
(I tried reading through the past posts but did not see anything that was helpful in regards to this type of drive)
Using: Final Cut Pro 5.1.1
Thanks!
Dual 2.7 Ghz PowerPC G5 Mac OS X (10.4.6)

If your RAID is down and you do not have a backup, you have a problem. I have one piece of discouraging advice:
Gather your crew and discuss your worst case project recovery scenario. If HUGE can fix it for you, then you will have the cozy satisfaction of knowing you have a plan in place.
Start tonight.
bogiesan

Mac Mini and WD My Book Duo RAID drives not mounting?

I have two of these My Book Duo drives connected via USB to my Mac Mini (late 2012), running OSX 10.9.5.
The drives are both configured as RAID 1, one has my iTunes and other media, the second one is the Time Machine backup disk. Last night when I restarted my computer neither drive mounted. I got an OSX error "THe disk is not readable" and a WD error "RAID stripe set has failed" box.
When I open the WD drive utilities I can't run any of the Diagnostics and the RAID Management tab says "RAID Status: Unknown" and suggests that I re-configure the drives.
I don't want to do that, obviously, as there is a total of over 3TB of data on both drives! It's suspicious that BOTH drives failed to mount at the same time... sounds like some software problem perhaps? I am posting here because it might be an OSX or local software problem?
I have updated the firmware on both drives and power-cycled them, restarted the computer several times, the usual things, but no luck. On a whim I tried updating the firmware a second time and got a different error in the firmware updater: "The drive is locked."
Any thoughts on what I could try? I've opened a Support Case with WD but oftentimes other users can be even more helpful! ;-)
Thanks, David

Hi, Thank you for the reply but I am definitely exactly one of those more Enterprise customers and my point is that your implementation is flawed and should be fixed because of course one of the reasons I bought the WD My Book Duo is because of encryption, but I want to own my encryption key and be able to decrypt my own data not have it hijacked. So I'm a little bit confused by your answer, is the official WD response that it acknowledges the worrysome problems I outlined but that there will be no plan to fix these issues? I am an IT consultant myself making recommendations for clients especially dealing with security. How can I recommend to "anyone" to use a product that seems to not care about preventing unnecessary data loss. It is not impossible nor even difficult for WD to fix this problem, to allow customers to access their own data off of their hard drives in case their "drive enclosure" develops problems or 'dies'. As I have already outlined, there are at least two ways or more that WD can fix this: 1. Allow enabling or disabling of the Encryption.And/OR2. Allow Exporting/Saving of the Encryption Key which we can then use with software to decrypt our hard drives in case of problems arising with our drive enclosure. Ideally the solution should include method #2 listed above so that we can enjoy the Encryption feature for which we purchased your products with assurance that we will NOT be locked out of our data for no good reason. I hope WD will consider taking a close look at this issue since it may at some point find itself with a lot of very angry customers when their WD My Book duos or other similar encrypted "drive enclosures" fail and people end up with perfectly functioning hard drives with data on them that they won't be able to access. Looking forward to a solution.

External cd/dvd drive not mounting on Macbook Pro with retina display, help?

Hi, I've recently purchased an amazon cd/dvd drive, this one to be exact http://www.amazon.co.uk/External-DVD-LIGHTSCRIBE-Burner-Netbook/dp/B00ABGW9J8, and it's not showing up on my desktop, sidebar or even the disc utility. When I plug it in the drive turns on and I can insert/eject discs, but it isn't mounting on my 10.9 macbook pro, any idea's how this can be fixed?

There have been numerous reports of problems with the USB 3.0 ports on the 2012 models - both Retina and non-Retina. There was a 'fix' that was issued before ML was released that seemed to have solved some problems but not all. ML was supposed to be the real 'fix' and I've not seen too many post about USB 3.0 problems lately. It just seems as if some drives work and some don't. Apple did issue a tech note about using USB 3.0 ports - http://support.apple.com/kb/HT5172#12 - but I'm not sure that it will help you or not.
I've not read of any problems with TB storage devices, so you'll likely be OK there. It's just those USB 3.0 devices that seemed to be causing some kinks.
Clinton

SOLUTION - USB 3.0 External Drives Not Mounting on MBP Retinas - SOLUTION

So I have been having the same problem as everyone else who has issues with USB 3 external hard drives not mounting on their MBP Retinas. My friend told me to try unplugging the USB cord and plugging it back in instantly (like in half a second, so as to not let the power turn off on the drive). I had my doubts but then I tried it just now, and MY DRIVE MOUNTED.
GO TRY IT AND SEE IF IT WORKS FOR YOU!
UPDATE: I am using a powered external drive (Seagate Backup Pro 3TB). Not sure if this will work with bus powered drives, but I think it might, as my friend might have been using a bus powered drive.
Also, I just bought two Hitachi TOURO 750GB bus powered portable drives (7200rpm/USB 3.0) and they mounted perfectly without problem as soon as I plugged it in for the first time.

Roderick A. Santiano wrote:
So I have been having the same problem as everyone else who has issues with USB 3 external hard drives not mounting on their MBP Retinas. My friend told me to try unplugging the USB cord and plugging it back in instantly (like in half a second, so as to not let the power turn off on the drive)...
Did you unplug the USB cable from the computer or from the external drive? This fix has been posted here previously but it was reported that the cable had to be unplugged from the device, not the computer. If the cable was unplugged from the computer instead, the fix didn't work.

External Hard Drives not Mounting after Yosemite Upgrade

I've just upgraded to Yosemite, and none of my external (USB) hard drives are mounting (they don't even appear in Disk Utility).
Any ideas?

MacBook Pro 2009. 250 SD, HD 8Gb Ram.
I have had this issue for about a year...with no resolve!
Apple and the User community have not been able to solve issue.
I have had to work around it since the Oct 2013 Mavericks upgrade which “killed” (rendered unmountable) both my USB and Optical drives.
Hundreds of replies and remedies have not corrected my issue. Hundreds of replies stating that if there was a global issue it would of been fixed by Apple, not true. And dismissive replies stating that there must be a hardware issue are very discouraging.
So now, hoping to help the voiceless masses, I'm forced to share my experience.
As I stated, I have been having the issue since one of the Mavericks upgrades. The upgrade rendered externally attached drives unmountable...They are all seen in Disk Utility. They are just not mountable. Regardless of the flavor of the disk format, either Mac or PC, they are found, seen and refuse to mount. I can see them using Terminal commands, I can see them in System Report. I can reset all the memory I want...turn it off, reset, sleep, turn on, restart...NOPE...And the optical drive takes in disks but ejects them after an attempted mounting. Keep in mind, there are no physical issues with either USB or optical drives.
So now...I have had enough and need to correct the issue or buy a new equipment - starting to get into software development and need working equipment!!!
For the past month, I have been visiting the Apple store to assist in my issues...Back Story: I'm an IT Field Tech for the largest department store in the country and I have the good fortune of dropping in the Apple store anytime I want...The Geniuses booted the MB with a bootable image of Mavericks, and the USB and Optical drives WORKED fine...So, after I had stumped the Geniuses with my problems, we agreed that we would attempt to format and re-image the MacBook...Fine, do it, it's backed-up, how you ask? - Via my wireless My Book Live 3T drive, which only took 24 hours to backup, AKA Time Machine!
Great news! The re-image of Mavericks proved to work! I WAS able to mount external drives attached! How is that possible? Don't know, don't care! It just worked! So happy!
But wait! I then took the laptop home. Connected to my WiFi, to update Mavericks to the latest version...Good so far! Then it came time for a Time Machine restore, AKA Migration Assistance restore...So, I proceeded to migrate data back to my MB via wireless drive, good so far, booted in Migration Assistant, and I chose to restore everything except the network files, thinking that may be an issue...22 Hours later, the MB migrated without issue...all apps and personal files had migrated! YAY!
BUT NOW THE USB AND OPTICAL DRIVES FAILED TO MOUNT!!!
Great now what? I know, I will just re-image and start again...WAIT, I don't have a Mavericks Install Disk, no problem, I will just create a bootable USB drive with the Mavericks Install Image I downloaded onto my MB this month...NO YOU CANNOT, because you have no use of the USB drives!...And, Apple stopped making OS CDs back in 2009...Oh, and that wouldn't of done me any good, because the optical dive was unusable, anyway!
SO, back to the Apple store with my head hanging! At this point, Yosemite came out the previous Thursday, so no more Mavericks images, great! Perhaps the new OS will alleviate my nightmare!!!!...So, they re-imaged my Mac with Mavericks, drives worked again! SO, I took my MB home and attempted to download the new OS, Yosemite...which only took 2 days due to the amount of traffic on Apple's servers!...Anyway, Yosemite finally installed without out issue! Drives still worked! And so, I shutdown and restarted the system...No issues, USB and optical drives worked beautifully! Yay, Yosemite!...Fixed all my troubles!!!...Not so fast...
And so, I, again, attempted to do a Time Machine restore, via WiFi, this time it took 24 hours to restore...AND it worked! All apps and personal files transferred without issue, So happy! Put the laptop in Sleep and left it home and went to work! Came back from work, tested the system without issues. Rebooted...USB and Optical drive are NOT MOUNTABLE!
So now, what is the file that the restore keeps pushing to my MB that kills the USB and optical drives?
I would just stop restoring from a Time Machine backup, but the only way to get into the TM image is to use Migration Assistant. I cannot view the date in time of the image in TM's Star Wars time line. So, I'm forced to back up everything from the image in Migration Assistance. Not sure that it being an encrypted image has anything to do with it...
...Regardless, what is being “restored” to the MB that continues to configure the OS in such a way that makes all external drives unmountable...keep in mind, my external keyboard, hub and mouse are usable via USB.

Apple Xserver Raid, 1 raid mounts and the other raid does not mount

Apple Xserver Raid, 1 raid mounts and the other raid does not mount but all the lights on the drives are green

Kind of lacking in detail there...
Did the other volume mount in the past? and it stopped working? When? What changed?
What does Raid Admin.app have to say about it?
Does it see the drives? a RAID set on those drives? A link on the fiber channel connection?

Have a LaCie external 2big RAID drive; two 1T drives in RAID 0 configuration (striped). Drive works perfectly as one big 2T external disk but Mac Installer (Lion - App Store download

Have a LaCie external 2big RAID drive; two 1T drives in RAID 0 configuration (striped). Drive works perfectly as one big 2T external disk but Mac Installer (Lion - App Store download & Snow Leopard DVD) refuse to install OS X Lion or OS X Snow Leopard on RAID drive.
Previous RAID - two 500g's in RAID 0 had SnowLeopard/Lion installed and worked just fine as bootable drive.
Help!

Keep in mind a RAID 1 only protects you from hardware failure of one of the drives. It does not protect you if the hardware raid/chip set decides to take a vacation. Also, if FCP corrupts a file, it is written as corrupt to both drives.
I'm a big fan of separate but equal. Two drives. One goes to the site, the other remains at the hotel. At night, you back up the site disk to the the hotel disk. If something happens to the computer and the disk at the site the next day, you at least have the material back at the hotel.
eggs. baskets. that sort of thing.
good luck.
x

10.6 to upgrade 10.8 my promise vess drive not mount again

when i upgrade 10.6 to 10.8 my promise vess drive not mount again.

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10.4.7 & FireWire drives not mounting

Hi everyone,
since this morning my trusted LaCie FW HDs won't mount, are not seen in System Profiler and Disk Utility.
I tried almost every thing I could find, resetting vram, pram, powering everything down, waiting, disconnecting all the cables, powering back up, connecting one after another, etc. - no changes.
Every application runs fine. Except, of course, Logic because I have all my sounds and song projects on these drives.
My system.log continues to say every second again:
...-Computer kernel[0]: AppleFWOHCI_AsyncTransmit::waitForDMA - context not going inactive.
The console.log repeats:
-Computer root[175]: [MAFL] attempt to make FSSpec for "121-210.cypress" failed -120\n
-Computer root[175]: [MAFL] attempt to make FSSpec for "210.cypress" failed -120\n
-Computer root[175]: [MAFL] found no firmware to load for 210\n
Does anybody know what these logs mean?
Is anybody else having this problem with 10.4.7?
I started a similar thread on A-S-D- Installation and Setup, only to find out, that a lot of people there are experiencing the same issue (FW drives not mounting, not showing).
Would resetting the PMU help?
Please help, I can't work

Back from the mysterious world of HDs, so easy to solve..., sometimes...
I tried the HDs on my friends older PB and all was fine.
Resetting my computers PMU did not solve the problem, after I tried everything else.
I refrained from reinstalling 10.4.7.
All other applications (but Logic, because I could not access my files) were running smooth.
Going back to 10 a.m. yesterday, basically starting over, there was one thing I missed checking (being human): the AC to DC converters supplied by LaCie for their drives.
See, they are under my desk, like out of sight...
Voilá! Individual testing revealed, that the AC/DC converter for the first LaCie drive in my chain did not spin up any of my other six LaCie drives, which I never run all at the same time, but they still have their own power supply.
Changed power supply on the first HD and now I am back to the fast speed and glitch free system I love. Back to enjoying work as well
What a day. And I am very sorry, that I was implying to blame 10.4.7 for this. My PB has never been faster

Usb optical drive not mounting

Usb Optical Drive not mounting via MacBook Pro (13inch 2013) since update to 10.10.1. Any positive solutions?

Hello MicroTuFF,
If you cannot get your USB SuperDrive to not mount disks, then take a look at the troubleshooting in the articles below. Start at the Doesn't accept discs section for your specific issue.
Get help with the slot-loading SuperDrive on your Mac computer
http://support.apple.com/en-us/HT201788
Regards,
-Norm G.

EMac External LACIE DVD Drive not reading.

eMac External LACIE DVD Drive not reading.
eMac 700 MHz running OS X 4.4
Came without DVD or modem internal
Has 256mb memory
Bought a used Lacie 1394 Firewire DVR External.
Was able to burn DVD’s and CD’s with Toast 6 Light.
Cannot find the “DVD Player” on the hard drive.
It will read data DVD.
eMac will not read any movies burnt or bought.
I was told I probably need more memory?
Thought running IDVD would fix the problem.
No Soap.
This machine was giving external modem problems before Tiger was installed.
Before we spend more money or just get ride of the eMac.
What is the DVD problem?
This same Lacie burner reads and writes DVD and CD fine with our iMac 450 DV 320mb memory. Running 9.2 and X.3

OS X 10.3.x / 10.4.x natively support data burning to external DVD drives but video payback requires software such as iDVD which isn't installed by default on models without an internal DVD drive (the installer sees no internal drive and thinks it's unnecessary). Try downloading VLC Player and see if that will let you play movies.

Seagate Goflex external drive not mounting

Upgraded to Yosemite with no problems. However my Seagate 3tb external drive will not mount, but it is recognized in the disk utility and it is recognized on a pc but will not mount? Is there anything I can do? I tried the goflex thunderbolt dock, Ive tried usb, Ive plugged it into an older imac with 10.7 on it and it says "unrecognizable drive" and gives me options to initialize or eject. Is there anything I can use to just get these files off of here on win or osx?
I have also plugged in two 1tb drives seagate and toshiba and they both work perfectly. And, I have also updated the thunderbolt drivers and all that... I am at a loss of what to do next.

Okay found out the problem, on my exfat formatted drive, after I upgraded to Yosemite it basically created a new partition, a corrupted partition and would not mount my drive. However, I could open it and see it in Disk Utility.
Here's what I did to fix it:
Goto disk utility to see the name of you drive.
Open Terminal and type: sudo fsck_exfat -d disk1s1(this should be the name of your disk)
It will ask for your password then press, enter and it will display all files on the disk.
Then is will ask: Main boot drive needs to be updated?
Type: Yes
It will update and say that you can repair disk in disk utility.
Do that, and it will show up on the desktop.
Link to original forum post if you need more information:
https://discussions.apple.com/thread/4154638?start=0&tstart=0
Hope this helps, it was a headache for about a week but, Ive read osx does not handle exfat formatting very well.

External Hard Drive not mounting on bootup

I have a USB2.0 Hard Drive formatted with ntfs, which holds my music. I have an fstab entry for it using ntfs-3g and I can mount it fine after booting up. But the drive doesn't automatically mount like it should. It looks like the system is mounting the fstab entries before it is finished detecting my external drive. Anything I can do to fix this?

fwojciec wrote:I let my external ntfs drive be mounted by hal - I have no entry for it in /etc/fstab. In order to have it mounted with read/write privileges I had to create a hal policy like this wiki page describes: http://wiki.archlinux.org/index.php/HAL … ntfs-3g.29
I'm not sure if this solution is what you're looking for though...
I actually tried using hal to do it and it didn't work right for some reason.

External hard drive not mounting on emac, works fine on windows xp machine

I am running an emac 1ghz powerpc G4 with 768MB sdram and version 10.4.9
I have an external hard drive that up to a few days ago ran smoothly. It contains all my itunes, iphoto, and imovie libraries.
Now it will not mount. It lights up, it runs, etc but I can't use it. I tried restarting machine etc. No avail.
it is a usb drive. Today I took it downstairs and plugged it into my daughter's windows xp machine. It recognized it right away (I was shocked too) and everything is there good as before.
I plugged it into every usb port in the emac and nothing. I am using the same cord on the xp and it works fine.
Any idea what it could be and how to fix it. I read on hear a lot to use disk utility. However when I run it it just freezes. When I turn that external drive off disk utility runs fine.

I am running an emac 1ghz powerpc G4 with 768MB sdram
and version 10.4.9
I have an external hard drive that up to a few days
ago ran smoothly. It contains all my itunes, iphoto,
and imovie libraries.
Now it will not mount. It lights up, it runs, etc
but I can't use it. I tried restarting machine etc.
No avail.
it is a usb drive. Today I took it downstairs and
plugged it into my daughter's windows xp machine. It
recognized it right away (I was shocked too) and
everything is there good as before.
I plugged it into every usb port in the emac and
nothing. I am using the same cord on the xp and it
works fine.
Any idea what it could be and how to fix it. I read
on hear a lot to use disk utility. However when I
run it it just freezes. When I turn that external
drive off disk utility runs fine.
Your external drive is formatted FAT32 or FAT, or the Windows box would have a problem seeing it. (Unless you have MacDrive on that box, that is.)
If it is formatted FAT32 or FAT, you are NOT going to be able to use Disk Utility (or any other Mac utility) on that drive. Disk Utility doesn't do FAT.
I'd copy the contents of the drive elsewhere then start up Disk Utility first and then plug the drive into the Mac and format it FAT32 from Disk Utility. If that doesn't work, format it FAT32 on the Windows machine. Note: if this drive is larger than 32 GB, you're going to need to generate two or more partitions, as while WinXP can read FAT32 partitions larger than 32 GB, it can't create them. Macs and Linux boxes can create large FAT32 partitions. Second note: if the drive is smaller than 4 GB, you might want to think about formatting it FAT instead of FAT32. Indeed, Windows may insist. Do not let Windows format it NTFS; Macs can read NTFS volumes, but can't write to them.

External SCSI RAID drives not mounting

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