Unable to see external USB hard drive

Time Capsule: 500gb
Ext HDD: Toshiba 500gb 2.5"
Have formatted the USB HDD as Mac OS (extended) and connected it to the USB connector at the back of the Time Capsule however the drive does not show up.
If we connect the drive to any other Mac it sees it immediately. Any suggestions on what we may be doing wrong?
Many thanks

The full setup is as follows:
Time Capsule 500GB with wireless switched off;
This is connected to the network via a Netgear wireless router;
There is a shared folder on the Time Capsule called "CLIENT SHARED";
In order to see the folder a user must logon to the Time Capsule;
The USB HDD is plugged into the rear of the Time Capsule;
Regarding the USB HDD:
It is a Toshiba 500GB 2.5" self powered external hard dive using USB 2.0;
The write status is "Read / Write";
The SMART status is "Not Supported";
The Partition Map Scheme is "Apple Partition Map";
It is formatted into a single partition using "Mac OS Extended (Journalled)";
If I connect it to any other Mac or MacBook in the office it can be seen;
Hope this helps.

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Unable to eject external USB hard drive

I've been using a 500 gb WD Passport external USB hard drive for about six months now, and recently it's had trouble ejecting. I'm not sure if it's the drive itself or my OS; sometimes I can eject it, other times I get the "the disk __ wasn't ejected because one or more programs may be using it.".
There are NO programs using the drive, and no users connected to the drive from elsewhere. Is there some process in the activity monitor that may be preventing the disk from unmounting?
I've tried to log out, relaunch the finder, quite all programs, etc - but the only sure fire method is to restart the computer - which leads me to believe there is some underlying system process that is causing the eject sequence to hang...
Any ideas? Will I potentially harm my disk's contents by force ejecting every time (so long as I'm certain no programs are writing files)?
Thanks!

I'm aslo having problems with a USB drive. In this case it's my Time Machine drive. Similar symptom that the only way to eject it is to restart the computer. Otherwise I get the same message. I also tried the Terminal command with the drag/return. What showed was an empty command line:
+ip-109-43-193-109:~ user$+
Now, the reason why I've even tried to do this is because I'm having problems backing up withTime Machine. Upon boot up, the first backup always works, but typically any subsequent b/up will fail with the following error code:
+Starting standard backup+
+Backing up to: /Volumes/Jimz TM 2/Backups.backupdb+
+Error: (22) setxattr for key:com.apple.backupd.ModelID path:/Volumes/Jimz TM 2/Backups.backupdb/user's MBP size:13+
+Error: (-50) Creating directory 2010-07-08-112436.inProgress+
+Failed to make snapshot container.+
+Error: (22) setxattr for key:com.apple.backupd.ModelID path:/Volumes/Jimz TM 2/Backups.backupdb/user's MBP size:13+
+Backup failed with error: 2+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
+Stopping backupd to allow ejection of backup destination disk!+
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Also, this is the first time that I've seen the error lines regarding ejection of the disc.
Thanks in advance for any thoughts on this.

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.

Rescue and Recovery 4.3 on Win7 doesn't see a backup on external USB hard drive - Model W510

I've run the Rescue and Recovery utility within Windows 7 on two different external USB hard drives thinking that maybe it was a usb drive issue. When I open the R And R utility in expert mode I can see that both backups exist on their respective drives. I planned on updating my hard drive so I made a full hd backup and the R&R startup disc to boot the laptop from. The bios recognizes either external hard drive at boot with no problems. It shows the names and "+" sign next to drives. So I booted the drive at startup off the DVD drive with the R&R startup disc after I was sure that the bios recognized either external drives. Then when I choose a "Full" restore is of course asks me if I want to use hd, cd/dvd, or external usb drive which I choose the later. It then should show me the backup that I created earlier just as it did when I ran the utility from the Win7 environment so I can choose it to restore from. But I get a blank box showing no backups when I run the 4.3 R&R Startup disc. Again if I boot to Win7 and go into the R&R utility I can see the backup on the exact same USB external drive. Then boot off the CD startup recovery disc and it shows NO BACKUP! Help please! I want to shelf my old hard drive "as is" and create the Restore onto the new hard drive but the utility isn't working for me.
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Hmmm,
Seems like that _should_ work. Here's a way you might be able to finesse it: go to the advanced R&R menu in Win 7 and create rescue media on your USB drive. It's essentially the same process as creating the CD - it makes the USB drive bootable and puts a copy of R&R there.
There _should_ be an option to "preserve existing data" but be prepared to lose your existing backup and make it again.
Then just boot the external USB drive and see if R&R recognizes a backup image on the same drive from which you booted.
That's the way I usually migrate to new drives. Maybe it will get around your mysterious problem.
Z.
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[SOLVED] Kernel panic when using external USB hard drive

I have a desktop PC with a 64 bit arch install, on a Core2 Duo 6320 CPU. I have been using (and continue using right now) a 500 GB "Iomega Desktop Hard Drive" external USB hard disk without problems. But I have just bought a 3 TB "Seagate Expansion" external USB hard drive and I'm unable to use it from my Arch install. Each time I try to format it or to copy data from the PC, Arch freezes with a kernel panic. Sometimes it freezes faster and I cannot see anything, but others I am able to see the following kernel messages, repeating several times:
[11701.205071] sd 3:0:0:0: [sdf] uas_eh_abort_handler ffff880014e13380 tag 29, inflight: CMD
[11701.221297] sd 3:0:0:0: [sdf] abort completed
[11701.221313] scsi host3: uas_eh_task_mgmt: ABORT TASK failed (wrong tag 0/256)
[11701.221323] sd 3:0:0:0: [sdf] uas_eh_abort_handler ffff880014e13500 tag 30, inflight: CMD
[11701.237550] sd 3:0:0:0: [sdf] abort completed
[11701.237567] scsi host3: uas_eh_task_mgmt: ABORT TASK failed (wrong tag 0/256)
[11701.237576] sd 3:0:0:0: [sdf] uas_eh_abort_handler ffff880014e13680 tag 31, inflight: CMD
[11701.253922] sd 3:0:0:0: [sdf] abort completed
[11701.253936] scsi host3: uas_eh_task_mgmt: ABORT TASK failed (wrong tag 0/256)
[11701.253956] sd 3:0:0:0: uas_eh_device_reset_handler
[11704.252182] scsi host3: uas_eh_task_mgmt: LOGICAL UNIT RESET timed out
[11704.252196] scsi host3: uas_eh_bus_reset_handler start
[11704.252443] usb 5-6: stat urb: killed, stream 0
[11704.358882] usb 5-6: reset high-speed USB device number 3 using ehci-pci
[11704.483206] scsi host3: uas_eh_bus_reset_handler success
Strange enough, the drive is listed by lsusb command as a 2TB but I don't think this is related to the problem (as the OS sees the 3 TB). This is the lsusb output:
Bus 001 Device 003: ID 0bc2:3312 Seagate RSS LLC SRD00F2 [Expansion Desktop Drive 2TB]
I have tried the drive on other PCs and it works flawlessly. Also tried booting Windows 8 on the same PC I have Arch installed in, and in Windows it also works perfect. I have tried using ext2 and NTFS filesystems. Tried also changing the USB cable without success. And right now I'm out of ideas. Any suggestions?
Last edited by doragasu (2014-07-03 11:06:25)

looks like it could be the UAS module , check https://bbs.archlinux.org/viewtopic.php?id=183190

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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.
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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.
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hi... i just tried that and nothing... it just comes up with that no entry kinda icon and wont let me mount it. I can still access all the files but i have to go into my volumes folder to do it.. which makes putting anything on the HD very awkward... it just won't appear in the finder or desktop... any other ideas?

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I carry my OS on an external portable USB drive, and then make use of whatever hardware is available where I visit.
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External USB Hard Drive causes menu problem - menu items flash

Greetings:
I have a external USB hard drive (250 GB) that is partitioned into 3 hard drives. Two hard drives are formatted in MacOS standard and one is formatted in MacOS extended. I had to reformat the last drive in MacOS extended because the Macbook would not let me edit files on the drive.
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Hmm, someone else had a similar problem. Note the ":: Loading root filesystem module...-e" line. That "-e" shouldn't be there. It should be, instead, the module for the filesystem.
As a workaround for right now, you can add your filesystem module to the MODULES array, and remove the "filesystems" hook.
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Is 250GB External USB Hard Drive compatible with Mac OSX on an iBook G4?

Hello,
I just bought a Toshiba 250GB External Usb Hard Drive because the seller recommended it to telling me that it works in my computer iBook G4 Mac OSX.
I prepared it and I see it on my desktop with a folder named System Volume Information and 2.32 GB available.
I tried to copy a file and I received a message telling that the disc can't be modified.
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Message was edited by: jinglada
Message was edited by: jinglada

I have a feeling this is a similar problem to my 400GB Usb2 drive. I reformatted it to the default Mac format in Disk Utility and it mounted!! Try this

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... I un-ticked the "put hard disks to sleep when possible" option in the Energy Saver panel in the System Preferences, and it seems the problem is solved. will have to sleep and wake up my iMac to further verify if this is the solution ...
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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?

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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
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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).
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USB2.0 Storage Device:
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Product ID: 0x6830
Vendor ID: 0x04b4 (Cypress Semiconductor)
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Manufacturer: Cypress Semiconductor
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Volumes:
USB:
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Writable: Yes
File System: Journaled HFS+
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Mount Point: /Volumes/USB
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External USB Hard Drive not showing up on Time Capsule

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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.
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All I can remember was an internal USB/firewire hub (for PCs, by the way), I haven't seen external adapters like cables; but you may simply ask in your local computer store about.
Yes, you can boot only from firewire drives. I was told that it is possible the new Intel Macs are able to boot from USB drives, but haven't had the time to verify this so far.
A possible solution may be to remove the harddisk from the USB enclosure and put it into a firewire case. This should work and you just need to buy the firewire case without the need for another harddisk. Just ensure that the case is able to take your harddrive (2.5" / 3.5" drives, connection interface).

Unable to see external USB hard drive

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