External usb hard drive won't mount on G4

I just bought an external USB 2.0 hard drive enclosure for a 30 gig HD I had in my old G3 Powerbook.It mounts fine on the older powerbook G3 with OS X 10.1.2, but not on the G4 titanium 10.3.9 I bought it for. Please help!

http://www.doubleh.com.tw/download/IDE%20Enclosure/Usb2.0%20IDE%20Enclosure/Alum inum%20case%20Enclosure(Genesys)/driver/Mac/Mac%20%2010.2x/
There used to be a couple of explanation on some ones' nomepage - the idea is (I think ) that hardware developers think it comes with OS and apple think that it comes with hardware driver.
Here is a discussion board in Swedish, but there used to be some English page somewhere ...
http://64.233.183.104/search?q=cache:KRxGo5q6MJcJ:www.99mac.se/forum/archive/ind ex.php/t-40336.html+GeneIOUSBIDE230&hl=en&ct=clnk&cd=3&client=safari

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External USB hard drive won't reformat, won't appear in Finder, error: Unable to write to the last block of the device message

So I just got a new MacBook Air and since I had an external USB hard drive (TOSHIBA MQ01ABD100 1TB) lying around, I decided to use it for back-up. Since I only have just the one hard drive, I decided to partition it into two - one for Time Machine backups, and one for general files (formatted FAT so I could use it with Windows). However, the partitioning failed and I ended up with a partition named disk1s2. Plus, it won't appear on Finder anymore, but it appears in Disk Utility.
I have tried to reformat it, but I always get the message "Unable to write to the last block of the device".
Here's the info about my drive:
Name: TOSHIBA MQ01ABD100 Media
Type: Disk
Partition Map Scheme: GUID Partition Table
Disk Identifier: disk1
Media Name: TOSHIBA MQ01ABD100 Media
Media Type: Generic
Connection Bus: USB
USB Serial Number: 1220069C
Device Tree: IODeviceTree:/PCI0@0/XHC@14
Writable: Yes
Ejectable: Yes
Location: External
Total Capacity: 1 TB
Disk Number: 1
Partition Number: 0
S.M.A.R.T. Status: Not Supported
And here's for disk1s2:
Name: disk1s2
Type: Partition
Disk Identifier: disk1s2
Mount Point: Not mounted
File System: Mac OS Extended
Connection Bus: USB
Device Tree: IODeviceTree:/PCI0@0/XHC@14
Writable: Yes
Capacity: 999.86 GB
Owners Enabled: No
Can Turn Owners Off: Yes
Can Be Formatted: Yes
Bootable: Yes
Supports Journaling: Yes
Journaled: No
Disk Number: 1
Partition Number: 2
Here's what it says when I run diskutil in Terminal:
Device Identifier:        disk1
Device Node:              /dev/disk1
Part of Whole:            disk1
Device / Media Name:      TOSHIBA MQ01ABD100 Media
Volume Name:              Not applicable (no file system)
Mounted:                  Not applicable (no file system)
File System:              None
Content (IOContent):      GUID_partition_scheme
OS Can Be Installed:      No
Media Type:               Generic
Protocol:                 USB
SMART Status:             Not Supported
Total Size:               1.0 TB (1000204884480 Bytes) (exactly 1953525165 512-Byte-Units)
Volume Free Space:        Not applicable (no file system)
Device Block Size:        512 Bytes
Read-Only Media:          No
Read-Only Volume:         Not applicable (no file system)
Ejectable:                Yes
Whole:                    Yes
Internal:                 No
OS 9 Drivers:             No
Low Level Format:         Not supported
I didn't have any data in it prior to the failed partitioning attempt, so there aren't any worries of data recovery. But I'd really like to be able to use this drive again, and save some money (external hard drives are expensive where I live). Anyone with any ideas?

I'd also like to add that repairing the disk using Disk Utility does nothing but tell me to reformat the drive. So I'm stuck in a loop here.

External USB hard drive doesn't mount until reboot

Hey there. I bought an external USB hard drive (a 250 GB drive by ComStar) last week, and I'm having trouble getting it to mount. The first time I plug it in, it works fine and shows up on the desktop. When I remove it (having properly ejected it first) and plug it in again later, it doesn't show up. It's not on the desktop, it's not in Disk Utility, and it's not in /Volumes (via the Terminal). If I reboot my Mac, it's there again.
Has anyone else had this problem with external drives? Are there any solutions or workarounds?

The first time I plug it in after a boot up. It doesn't matter if my Mac has been up for three weeks -- if it's the first time I've plugged in the hard drive since the last reboot, it always works perfectly.
It's very strange and annoying. It's almost like it's not getting ejected properly.
That being said, I just ejected and unplugged it, waited five minutes, and plugged it back in. The stupid thing worked this time. It's driving me nuts! I don't mind things that don't work, but things that work sometimes are really frustrating. If no one else is having this issue, it's probably something unique to this particular drive.

External Firewire hard drive won't mount after 10.4.10 update

I see many posts about USB drives not mounting after 10.4.10 update. Just lending my voice to that issue (my USB drive won't work either) as well as the 10.4.10 update breaking Firewire drives.
Hope a fix is coming. No backups are scaaaary.

How to fix the problem of a missing external Hard Drive (Firewire) after it vanishes from you desktop after installing 10.4.10 update.
I have a iMac PPC (Non intel). Aparently my system upated installed the wrong version of 10.4.10 and thus my external firewire hard drives a 320 GB Westerndigital My Book, and Acomdata 80 GB, and aWestern Digital 160 GB media center all vanished from the desktop.
The instructions below should be credited to several different people. I found various version of these steps in the Discussion. I combines a few of them into this one 10 step fix and it worked for me. I hope it works for you.
1) Shut down you computer
2) Unplug all peripherals (i.e USB and Firewire, I left computer power plug in as well as ethernet and Keyboard+ Mouse) and leave along for 30 Minutes
3) Restart holding down the Command (Apple) + Option + P + R keys for three startup bongs, then release the keys and your computer will start up as usual.
4) Verify and repair disk Permission using Disk Utility. (Several things were repaired here)
5) Instal 10.4.10 Combo PPC
6) Restart Again
7) Again repair Disk permissions (None of mine needed to be repaired fyi this time)
8) Unplug Power cable and Firewire cable from External Hard Drive (leave along for 1 minute)
9) Reconnect power to Firewire External Drive first then the Firewire cable to the drive second, then the firewire cable from the Drive to the computer last.
10) Turn on your Firewire Drive... you will head it spin up and eventually show up on your desktop just like it did before the 10.4.10 update.

USB hard drive won't mount on startup

I recently (2 days ago) purchased a new 21.5" iMac (mid 2011). Yesterday I installed the update to 10.6.8, and since then have had an unusual problem. I own two external USB drives. One for Time Machine, and another that houses my iTunes library. Both are formated to Mac File System (Journaled). When I originally set up the computer, and completed the transfer of my data and accounts from my old Mac, both of the external drives mounted on the desktop exactly as they should and everything worked without issue. But then I did a Software update, which installed a bunch of updates to iTunes, Java, etc. This update included the update which took the system from 10.6.6 to 10.6.8. Now whenever I reboot the computer, the drive that houses my iTunes library will not mount when my desktop loads. I have to reach around the computer and physically disconnect and reconnect the USB cable before the computer will recognize the volume. Disk Utility won't even see it until I do this. Once I reconnect the cable, the drive works as it should until I reboot again, and I have to disconnect/reconnect the cable again to get it to work.
I don't believe this is a problem with the hard drive itself, because it worked as it should up until the software update, and it continues to work as it should on the old computer that it was hooked up to before I upgraded.
I have searched google, and apple.com for similar situations and I have come up empty. Is there anyone who might have any ideas on how to fix this? it's rather annoying to reconnect the drive each and every time I turn on the computer.
Thanks!

Repair Disk Permissions on the internal HD and also on the EHDs. Then do restart in Safe Mode and then do both SMC and PRAM resets.
SMC RESET
Shut down the computer.
Unplug the computer's power cord and all peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.
Roger

USB Hard drive won't mount

I have a problem with a hard drive connected in an external USB enclosure to a Mac Mini Core Duo, that occasionally fails to mount automatically when powered up. Apple's System Profiler "sees" the drives (and both formatted partitions on it), but I cannot access the files. Is there any type of utility that will allow me to mount the drive manually?
Thanks in advance,
Robert

try Apple's Disk Utility
/Applications/Utilities/Disk Utility
regards,
Pete.

HELP - External USB Hard Drive Will Not Mount

Ok, I've read through MANY other external HD mounting problems but can't find anything that helps me with my specific problem. Here goes...
I have all of my graphic/music files on the HD of my Mac. I want to copy these files to a drive so that I can clean it off and sell it. I will be transferring the files to a PC.
I purchased a USB external HD from Best Buy four months ago. I plugged it in and it asked me to reformat the drive as Macintosh. I took it back and had them reformat the drive as FAT32 so that I could use it on both systems. I had this done twice because it didn't work the first time. Well, it didn't work the second time either but they tested it on their Macs and it worked so I think it's a problem with my Mac.
The drive is recognized in both the System Profiler and the Disk Utility. When I try to mount it in the Disk Utility, nothing happens and it goes back to "Select a disk or volume".
I would like to get this problem fixed without spending any more money on it. I've contacted Mac techs and they usually charge $100/hour and can't guarantee how long it would take to fix. That, and I don't know anyone I trust with my precious data.
I'm beyond frustrated with this as I have been dealing with it for over six months now. I have tried unplugging and replugging but nothing seems to work. I've tried all USB ports (keyboard, monitor, tower) and various different power outlets (wall, power strip, etc...). The data is irrecplaceable and I'm nervous that it just sits on the computer without being backed up. If anyone has any ideas for me to try, please let me know. I am at my wits end.
Also, now it seems that Apple System Profiler "unexpectedly quits" when I try to open it. Any ideas???
Thank you

Here is a USB faq. Hope it helps!
Try using Disk Utility to do a Disk Repair, as shown in this link, while booted up on your install disk for your unepectedly quit issue.
You could have some directory corruption. Let us know what errors Disk Utility reports and if DU was able to repair them.
Try the repair first. if no luck try things in this Unexpectedly Quit link.
Cheers! DALE

Firewire and USB hard drives won't mount on Xserve - 10.5.8

I have a triple interface drive set for rotating backups, and they've stopped mounting on my Xserve. Disk Utility can't see them at all, but System Profiler sees when I plug them in. The drive specifics for the volume are missing, but they ID correctly. Same drives plugged into an iMac and a MacBook Pro mount perfectly every time, both over USB and Firewire. Disk Utility via the iMac shows no problems at all. I've tried rebooting the Xserve... doesn't help.
I kinda need my backup to run on my server. Thoughts on how to resolve?

Sounds like you should be posting to the Xserve forum.

Buffalo USB Hard Drive won't mount after 10.4.10 upgrade

After updating to OS X 10.4.10, my Buffalo Drivestation wouldn't mount. My MacBook could see that it was connected in System Profiler, but I couldn't access it. I (rather painfully !) backed out the update and reverted back to 10.4.9. Has anyone else had this problem ? Is there a solution that lets you use 10.4.10 ?

I have the exact same problem! I tried accessing it through my Windows, and it worked, but I have to say this is very disappointing and upsetting.

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, even after disk repair.

My Toshiba external hard drive won't mount on my MacBook Pro 10.8.5. I can see it in my disk repair, and when I repair, "the partition map appears to be ok." But I can't access the icon to be able to open the hard drive contents on my desktop. Help!

Hello maccynicwhoalwayshasmacs,
Thanks for the question. After reviewing your post, it sounds like trouble with an external HD mounting. I would recommend that you read this article, it may be able to help you resolve or isolate the issue.
USB and FireWire Quick Assist
Thanks for using Apple Support Communities.
Have a nice day,
Mario

How to use iPad (4th gen) to edit with iMovie - but using an external source such as a USB stick or external USB hard drive

Want to use my iPad (4th gen) to edit a movie using iMovie - easy enough if the movie file is on the iPad - but what if it's too large - can I keep the source file on a USB stick or external USB hard drive and edit from there? How can you do this?

You can't export any type of file using the camera connection kit, so a USB flash drive or SD card won't work.
There are some wireless external hard drives that can be used with the iPad.
The Kingston Wi-Drive, which costs $50 for the 16 Gigabyte, and then $30 more for every 16 gigs more. It works by you turning it on and then accessing the files on it from an app that you download on your iDevice. You can access music, movies, and other stuff. No connections or anything, it works like a WiFi connection, you connect to it from the setting on the iPad under wireless networks.
Then there is the Seagate GoFlex, which some would recommend over the Wi-Drive. But this one costs $199 and had 500 Gigabytes of storage. It works the sameway as the Kingston: no wires, runs over its wireless connection. You can actually fit up to 300 HD movies on it.
Another option:
Expand your iPad's storage capacity with HyperDrive
http://www.macworld.com/article/1153935/hyperdrive.html
On the road with a camera, an iPad, and a Hyperdrive
http://www.macworld.com/article/1160231/ipadhyperdrive.html
 Cheers, Tom

External USB hard drive not being recognized

Hello! I'm sure this has been posted before, but excuse my naivety with this sort of thing...
I have a mac mini 10.5.6 (1.83 GHz Intel Core 2 Duo) and I run the Time Machine function to an external usb hard drive. The hard drive worked fine (plugged into the usb port on an older keyboard), but I went out and bought a new aluminum apple keyboard (because they look so cool ^_^ ) - I plugged the external usb drive into the keyboard and it wasn't recognized, so I tried plugging the external drive directly into the mac mini, but it is still not recognized. It is not showing up in Disk Utility or in System Profiler
Help? I'd hate to have to give up this fancy keyboard...
Thank you!
Dr. E

I believe I had my external drive plugged into the (old) keyboard because with the old mac that I had didn't have a free usb port for it - so when I got the mini I just plugged things back in where they were. But I have always had the Time Machine back up to this drive (connected to the keyboard) though it has been slow (another reason I thought the new keyboard was a good idea).
I tried restarting the computer without the alu keyboard plugged in, but same problem of no drive showing up.
Here is what System Profiler has to say about my drive:
USB2.0 Storage Device:
Capacity: 93.16 GB
Removable Media: Yes
Detachable Drive: Yes
BSD Name: disk1
Product ID: 0x6830
Vendor ID: 0x04b4 (Cypress Semiconductor)
Version: 0.01
Serial Number: DEF107920F07
Speed: Up to 12 Mb/sec
Manufacturer: Cypress Semiconductor
Location ID: 0x3d130000
Current Available (mA): 100
Current Required (mA): 0
Mac OS 9 Drivers: No
Partition Map Type: GPT (GUID Partition Table)
S.M.A.R.T. status: Not Supported
Volumes:
USB:
Capacity: 92.84 GB
Available: 53.14 GB
Writable: Yes
File System: Journaled HFS+
BSD Name: disk1s2
Mount Point: /Volumes/USB
I don't know the brand or model as it has 'always' been in the case that in which it currently resides and I didn't physically buy the thing :\ I do know that no software was installed with the drive as I assumed that when I put all the old info from the original mac to the mini that it was the sort of thing that would carry over.
Sorry I'm not terribly helpful - Thank you!
Dr. E

2.5" external USB hard drive not recognized by my iMac

I have a small 2.5" external USB hard drive that my intel iMac will not mount or see. My 12" G4 Powerbook sees it fine and it is formatted in Mac OS Extended. My iMac is bootcamped and XP on my iMac sees the drive but not OS X Tiger on the iMac, (wierd) I have Tiger on both my Macs too.
Why does the intel based OS X refuse to see this external 2.5 HD. It sees a 3.5" USB one I have but not the small one. I know it is software.

Hey coby,
Well thanks for the star. Not sure I deserve it.
i then tried connecting the drive to each USB port again, and voila! i have found one it works in. I guess my computer's ports must be a little worn.
Hmm well try looking inside and see if there's some smutz in there, if the contacts are dirty or bent or worn.
i was starting to think i would have to go out and get a USB hub to give it some more power.
Is it powered off the USB? If so that actually might be a good idea since that puts a lot of strain on the connectors. Even if it's self powered it might be a good idea since it would take the strain off an obviously flakey USB.
richard

External USB Hard Drive not showing up on Time Capsule

Hi all,
I have a 500 Gb Time Capsule that used to be able to detect my external USB hard drives. I had to store my things for a while and have just started using the Time Capsule again. The TC works fine, however, the same USB external hard drives I used to connect to the TC are not showing up anymore :s They show up on the desktop when I connect them directly to my MacBook via USB. I have been through most of the file sharing options in Airport Utility and System Preferences but have not been able to solve this. I can't think of any settings that would have changed from when they were showing up in the past. Any help would be greatly appreciated. Thx

yosemite won't work with ntfs drives for some reason, i've had the same issue with my toshiba. i thought ok lemme buy another one, and transfer it over maybe it's a driver issue which i've tried over and over, apple support can't figure it out.
here's a simple fix, but the problem is i have an external where all my photography and video files are stored, so i can't access them right now and it's making my life ****.
http://guides.macrumors.com/Formatting_an_External_Device
that does work and make the drive mountable now, but problem being i can't obviously reformat the old drive and lose everything. once the new drive is formatted for mac i can't plug it into a pc to transfer the files from. which is the only problem now. but formatting the drive for mac only DOES work. but you're just screwed and not able to use it ntfs. hope the link helps SOME people.

External usb hard drive won't mount on G4

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