External Time Machine disk not showing up

Hi there.
Today, when I connected my external Western Digital My Passport disk, that's also my Time Machine backup, it didn't show up in Finder.
I haven't done like unplugging it without ejecting. By the way, even if the hard drive doesn't show up in Finder, it is recognized by Disk Utility, that's asking me to repair it. If I try to repair it, the process gets stuck.
I tried to do two actions:
1) opening Time Machine and trying to understand if the hard disk is recognized. And the answer is YES, and I can also recover backups! Unfortunately, I stored some files (my entire iTunes library) on it not as backups.
2) trying to use an external software like DriveGenius. It recognizes it, but it can't repair (and it doesn't showing up in the repairable devices).
So,
what can I do? I can't lose that files!
Thanks in advance
Screenshot:
http://cl.ly/image/112F112W2e3V Disk Utility message

I couldn't migrate from Snow Leopard drive either -- Snow Leopard used PGP encyption, migration copied the files, but they seem inaccessible to Lion with "permission denied" errors.
It sounds like you did migrate successfully. It's normal for the permissions to be wrong -- Migration Assistant creates a new account with the files from the old one.
What I would do in your place is start over. First, decrypt the SL volume and uninstall PGP. You should do that anyway, because PGP is a turkey and not needed in Lion. Erase the Lion volume (assuming you have no data on it that isn't already on your SL volume), reinstall Lion, and then use Setup Assistant, not Migration Assistant, to do the migration.

Similar Messages

Time Machine disk not showing up in Migration Assistant

I have backed up my Snow Leopard with Time Machine and I'm trying to import my stuff into Lion using Migration Assistant. However, my Time Machine disk is not showing up in Migration Assistant even though it's connected and shows in Finder. Any idea why?

I couldn't migrate from Snow Leopard drive either -- Snow Leopard used PGP encyption, migration copied the files, but they seem inaccessible to Lion with "permission denied" errors.
It sounds like you did migrate successfully. It's normal for the permissions to be wrong -- Migration Assistant creates a new account with the files from the old one.
What I would do in your place is start over. First, decrypt the SL volume and uninstall PGP. You should do that anyway, because PGP is a turkey and not needed in Lion. Erase the Lion volume (assuming you have no data on it that isn't already on your SL volume), reinstall Lion, and then use Setup Assistant, not Migration Assistant, to do the migration.

Time Machine - Browse other Time Machine disk - not showing all files

I have an Xserve, running 10.6 server, where we keep all of our files. It backs up via Time Machine. Many users use the shared drives on the Xserve, and I encourage them to put their files there. We work in a design / production house, so many people collaborate on files. Due to the nature of the business, with frequent design changes, we need to go "back in time" and pull out previous versions of designs, etc. Usually I handle this by remotely accessing the Xserve, starting up time machine, and pulling out the old versions of files from the backups.
However, when I'm not in, I wanted to make this option available to another user, without giving her full access to the server. I discovered the "Browse Other Time Machine" option, and after making my Time Machine disk (actually a rack-mount Mercury Pro RAID array) shared, I was able to mount it on her Mac, also running 10.6. I thought this would be a nice solution.
The problem is, in some directories, when browsing from her computer, Time machine is showing no backups. It's impossible to go back more than a few snapshots with it. Meanwhile, if I do it on the server, everything is fine. So I thought perhaps it was a permissions issue, but I don't want to muck up the permissions on my time machine drive and risk losing everything. I did add her account as a user with read-only access to the time machine drive, and told it to apply to all sub folders. This didn't make any difference.
What is the issue? Is it permissions? Or is my Time Machine too large (6TB) that it can't load all the data over the network? Has anyone encountered this before? What is the best way to troubleshoot?

If you still have the old imac connect tbe two with an ethernet cable and use migration assistant. Move your data to a new Mac - Apple Support

External Time Machine Disk Will Not Unmount

This past weekend I did clean installs of Lion on new SSD drives in my MacBook and MacPro. The MacBook backs up to a Time Capsule with Time Machine and is working perfectly. The MacPro backs up fine and says the backup is completed but it will not unmount the external Time Machine disk I use for the backup after completion. This was not a problem using the same setup with Snow Leopard. I looked at the Console which says Backup completed successfully. Any idea what is going on with this? Thanks in advance.

RecalcitrantRon wrote:
The MacPro backs up fine and says the backup is completed but it will not unmount the external Time Machine disk I use for the backup after completion.
Wait a minute . . . I missed that before.
Is that disk connected directly to the Mac? If so, no, Time Machine doesn't unmount directly-connected drives after a backup, only sparse bundles on network drives.

After install of Lion, secondary internal hard drive used for backup and time machine is not showing on the desktop.

After an install of Lion, my secondary internal hard drive used for backup and time machine is not showing on the desktop. Cannot be located with Disk Utility either. Contains vital files! please help...

I have a TB internal drive, but this is what it shows for memory slots:
Memory Slots:
ECC:    Enabled
DIMM Riser B/DIMM 1:
Size:    2 GB
Type:    DDR2 FB-DIMM
Speed:    800 MHz
Status:    OK
Manufacturer:    0x0000
Part Number:    0x000000463732353642363145353830304600
Serial Number:    0x00000000
DIMM Riser B/DIMM 2:
Size:    2 GB
Type:    DDR2 FB-DIMM
Speed:    800 MHz
Status:    OK
Manufacturer:    0x0000
Part Number:    0x000000463732353642363145353830304600
Serial Number:    0x00000000
DIMM Riser A/DIMM 1:
Size:    1 GB
Type:    DDR2 FB-DIMM
Speed:    800 MHz
Status:    OK
Manufacturer:    0x80AD
Part Number:    0x48594D5035313241373243503844332D5335
Serial Number:    0x42076007
DIMM Riser A/DIMM 2:
Size:    1 GB
Type:    DDR2 FB-DIMM
Speed:    800 MHz
Status:    OK
Manufacturer:    0x80AD
Part Number:    0x48594D5035313241373243503844332D5335
Serial Number:    0x4207631E
DIMM Riser B/DIMM 3:
Size:    Empty
Type:    Empty
Speed:    Empty
Status:    Empty
Manufacturer:    Empty
Part Number:    Empty
Serial Number:    Empty
DIMM Riser B/DIMM 4:
Size:    Empty
Type:    Empty
Speed:    Empty
Status:    Empty
Manufacturer:    Empty
Part Number:    Empty
Serial Number:    Empty
DIMM Riser A/DIMM 3:
Size:    Empty
Type:    Empty
Speed:    Empty
Status:    Empty
Manufacturer:    Empty
Part Number:    Empty
Serial Number:    Empty
DIMM Riser A/DIMM 4:
Size:    Empty
Type:    Empty
Speed:    Empty
Status:    Empty
Manufacturer:    Empty
Part Number:    Empty
Serial Number:    Empty

My external Time Machine disk is almost full. I know TM is supposed to erase the oldest back-ups to makew room for newer ones but is it safe for me to just erase the back-ups from 2 or so years ago to make room for TM as well as anything I might want to

My external Time Machine disk is almost full. I know TM is supposed to erase the oldest back-ups to make room for newer ones but is it safe for me to just erase the back-ups from 2 or so years ago to make room for TM as well as anything else I might want to add to this external drive?

Time Machine makes room for backups as necessary in a complex and sophisticated fashion, and it's not something to mess with lightly. However there are instructions at the bottom of this link which tell you how you can. Those instructions are part of the ultimate resource for all things Time Machine, put together by an Apple Support Communities member who is greatly missed.

Time Machine Disk not mount

Time Machine has been making its regular backups but now for some reason, Time Machine is not recognizing the external disk. I have tried restarting the machine, powering off and on the external drive, changing firewire ports and nothing has worked. Does anyone have any ideas I have not tried? Thanks!

Colin1 wrote:
Hopefully the sheer weight of numbers of TC owners complaining about the back-up function not working will eventually move Apple to investigate. I have tried everything and believe it is a problem caused by the OSX 10.5.4 update, at least that's when my similar problems started.
I'm hoping that's what it is. My BRAND NEW iMac + BRAND NEW 500GB TC Can't talk,
It tells me that the TC failed to mount everytime Time Machine starts.
My TC at home (1TB) & this MacBook Pro haven't given me this ever since Feb., until last night. Luckily, I restored to a TC backup from a few days ago on my MacBook Pro & it's backing up fine so far now at home.
My local Apple store is stunned at my work one, though.

Time Machine disk not recognised

My G5 PowerMac has been away for repair; it's needed a new logic board. It was away for nearly two weeks. Now Time Machine doesn't recognise the external drive which contains the Time Machine backups from last November. It wants to do a backup from scratch and says there isn't enough space on the disk.
Is there any way of getting the Time Machine to recognise the previous backups and start adding to them?
I'll be very grateful for any advice.

To TM, it is a different computer. The logic board includes your Ethernet "Mac Address", which is a unique number that TM uses to be sure it knows which Mac is which.
There is a fairly elaborate way to attempt to persuade TM that the existing backups really are for your "new" Mac: http://www.macosxhints.com/article.php?story=20080128003716101
It is very easy for the inexperienced user of Terminal (and the not-so-inexperienced as well) to make an error with Terminal, get no error message, and have it not work, so try it at your own risk.
But there is an alternative: hold down the Option key while selecting the TM icon in your Menubar. The +Enter Time Machine+ option changes to +Browse Other Time Machine Disks.+ That's a bit misleading, but it will take you into the normal TM interface where you can see and restore from the old set of backups.
Even if you're successful with the Terminal work, your first backup with the new logic board may be a full one -- every file and folder on your system. If TM decides to do that, you cannot prevent it.
So if your TM disk/partition isn't at least 2.5 times the size of the data it's backing-up, your best bet may be to just erase it with Disk Utility and let TM start over.

Time Machine does not show after installing Lion?!

I upgraded to Lion and now my Time Machine does not work. When I connect the disk it starts and then shuts down. It does not show neither on desktop or on Time Machine. Any ideas. I hate the thought of reinstalling Snow Leopard but...
Thank you in advance
Matej

No reason to reinstall Snow Leopard.
What's shown on the Time Machine Preferences window for Latest Backup? If it shows "Error" in red, see #C2 in Time Machine - Troubleshooting.
If not, a clue may be lurking in your logs. Use the widget in #A1 of Time Machine - Troubleshooting to display the backup messages from your logs. Locate the backup in question, then copy and post all the messages here.

Time machine does not show latest backups

My Time Machine backup to an external NAS (WD Mybook World Edition) runs without any error on the GUI, but when I look into the Time Machine finder history I can only see backups which are 13 days old (June 1st).
here is the log of the successful (?) run:
13.06.12 07:49:17,673 com.apple.backupd: Starting standard backup
13.06.12 07:49:37,736 com.apple.backupd: Attempting to mount network destination URL: afp://[email protected]/WD_Backup
13.06.12 07:50:09,976 com.apple.backupd: Mounted network destination at mountpoint: /Volumes/WD_Backup using URL: afp://[email protected]/WD_Backup
13.06.12 07:50:31,443 com.apple.backupd: QUICKCHECK ONLY; FILESYSTEM CLEAN
13.06.12 07:50:35,076 com.apple.backupd: Disk image /Volumes/WD_Backup/silverstar.sparsebundle mounted at: /Volumes/Time Machine-Backups
13.06.12 07:50:35,091 com.apple.backupd: Backing up to: /Volumes/Time Machine-Backups/Backups.backupdb
13.06.12 07:50:42,703 com.apple.backupd: Deep event scan at path:/Users/florian/Pictures/Aperture Trial Library.aplibrary/Database/apdb reason:must scan subdirs|missed reservation|
13.06.12 07:50:43,331 com.apple.backupd: Finished scan
13.06.12 07:51:11,996 com.apple.backupd: 1.33 GB required (including padding), 763.52 GB available
13.06.12 07:51:11,998 com.apple.backupd: Waiting for index to be ready (101)
13.06.12 07:56:03,871 com.apple.backupd: Copied 1766 files (739.0 MB) from volume Macintosh HD.
13.06.12 07:56:15,835 com.apple.backupd: 1.34 GB required (including padding), 763.52 GB available
13.06.12 07:58:16,546 com.apple.backupd: Copied 1323 files (313.4 MB) from volume Macintosh HD.
13.06.12 07:58:45,338 com.apple.backupd: Starting post-backup thinning
13.06.12 07:58:45,338 com.apple.backupd: No post-back up thinning needed: no expired backups exist
13.06.12 07:58:45,592 com.apple.backupd: Backup completed successfully.
13.06.12 07:58:49,102 com.apple.backupd: Ejected Time Machine disk image.
13.06.12 07:58:49,661 com.apple.backupd: Ejected Time Machine network volume.
13.06.12 07:59:41,572 com.apple.backupd: Attempting to mount network destination URL: afp://[email protected]/WD_Backup
13.06.12 08:00:09,835 com.apple.backupd: Mounted network destination at mountpoint: /Volumes/WD_Backup using URL: afp://[email protected]/WD_Backup
13.06.12 08:00:30,871 com.apple.backupd: QUICKCHECK ONLY; FILESYSTEM CLEAN
13.06.12 08:00:33,932 com.apple.backupd: Disk image /Volumes/WD_Backup/silverstar.sparsebundle mounted at: /Volumes/Time Machine-Backups
Configuration:
Mac OS X 10.7.4
WD MyBook World Edition 2TB 01.02.12 with MioNet
Any idea what's wrong?

My Time Machine backup to an external NAS (WD Mybook World Edition) runs without any error on the GUI, but when I look into the Time Machine finder history I can only see backups which are 13 days old (June 1st).
here is the log of the successful (?) run:
13.06.12 07:49:17,673 com.apple.backupd: Starting standard backup
13.06.12 07:49:37,736 com.apple.backupd: Attempting to mount network destination URL: afp://[email protected]/WD_Backup
13.06.12 07:50:09,976 com.apple.backupd: Mounted network destination at mountpoint: /Volumes/WD_Backup using URL: afp://[email protected]/WD_Backup
13.06.12 07:50:31,443 com.apple.backupd: QUICKCHECK ONLY; FILESYSTEM CLEAN
13.06.12 07:50:35,076 com.apple.backupd: Disk image /Volumes/WD_Backup/silverstar.sparsebundle mounted at: /Volumes/Time Machine-Backups
13.06.12 07:50:35,091 com.apple.backupd: Backing up to: /Volumes/Time Machine-Backups/Backups.backupdb
13.06.12 07:50:42,703 com.apple.backupd: Deep event scan at path:/Users/florian/Pictures/Aperture Trial Library.aplibrary/Database/apdb reason:must scan subdirs|missed reservation|
13.06.12 07:50:43,331 com.apple.backupd: Finished scan
13.06.12 07:51:11,996 com.apple.backupd: 1.33 GB required (including padding), 763.52 GB available
13.06.12 07:51:11,998 com.apple.backupd: Waiting for index to be ready (101)
13.06.12 07:56:03,871 com.apple.backupd: Copied 1766 files (739.0 MB) from volume Macintosh HD.
13.06.12 07:56:15,835 com.apple.backupd: 1.34 GB required (including padding), 763.52 GB available
13.06.12 07:58:16,546 com.apple.backupd: Copied 1323 files (313.4 MB) from volume Macintosh HD.
13.06.12 07:58:45,338 com.apple.backupd: Starting post-backup thinning
13.06.12 07:58:45,338 com.apple.backupd: No post-back up thinning needed: no expired backups exist
13.06.12 07:58:45,592 com.apple.backupd: Backup completed successfully.
13.06.12 07:58:49,102 com.apple.backupd: Ejected Time Machine disk image.
13.06.12 07:58:49,661 com.apple.backupd: Ejected Time Machine network volume.
13.06.12 07:59:41,572 com.apple.backupd: Attempting to mount network destination URL: afp://[email protected]/WD_Backup
13.06.12 08:00:09,835 com.apple.backupd: Mounted network destination at mountpoint: /Volumes/WD_Backup using URL: afp://[email protected]/WD_Backup
13.06.12 08:00:30,871 com.apple.backupd: QUICKCHECK ONLY; FILESYSTEM CLEAN
13.06.12 08:00:33,932 com.apple.backupd: Disk image /Volumes/WD_Backup/silverstar.sparsebundle mounted at: /Volumes/Time Machine-Backups
Configuration:
Mac OS X 10.7.4
WD MyBook World Edition 2TB 01.02.12 with MioNet
Any idea what's wrong?

Time machine disk not ejecting

I'm having trouble ejecting my Time Machine disk from my mid-2012 retina MBP since installing Yosemite. If I control-click on the disk image and select EJECT, the image grays out a little but won't eject. If I try to start Disk Utility, it hangs and won't start. However, if I first start Disk Utility and then select the Time machine drive and select Unmount followed by Eject, the disk will eject.
Anybody else having this problem? I don't recall having this issue with earlier versions of OS X.

Well, nobody replied but I'll post what solved the problem: installing an app called "Mountain." I also noticed that a recent Yosemite update including a fix for Time Machine problems but I don't know if it address this problem. In any event, since installing Mountain, I never have a problem ejecting discs.

Network time machine backup not showing on Yosemite

Hi,
One of the people within the office is having a problem with their Time machine backups. The password had been changed on the computer where the hard drive is shared but they where not concerned with their backups as they are using a Macbook so they back up at home and we also use a time capsule as a backup backup drive incase the main drive has stopped for some reason.
Now they are wanting to use the main drive to back up to and I can not seem to find the drive in time machine but when I connect to the computer where the drive is attached to I can gain access to the drive but Time machine can not find it.
The host computer is running Mavericks and the computer that is having problems is using Yosemite Beta could this be why time machine is having trouble trying to find it?
The drive in question is a SmartStor DS4600 6TB no one else is having problems backing up to it, they are using Mavericks.
Thanks,
Bruce

Hi philravens24!
I have an article here for you that can help you troubleshoot this issue:
Time Machine: Troubleshooting backup issues
http://support.apple.com/kb/ht3275
Further articles addressing Time Machine issues can be found here:
OS X Mountain Lion: Time Machine problems
http://support.apple.com/kb/PH11194
Thanks for using the Apple Support Communities!
Cheers,
Braden

Time Machine HD not showing latest backup, can't restore system

Please forgive the short story, but I'll give as many details as I can:
Last night I successfully installed XP on my MacBook Pro using Boot Camp. I decided to do the same to my iMac (21.5" 2010 Version). I used Boot Camp to initiate the partition process to create my Windows partition. It told me that I had files that couldn't be moved and I would have to:
1. Backup my startup disk (the main and only internal hard drive)
2. Reformat the hard drive I want to create the Windows partition on
3. Restore from the backup
4. Use Boot Camp to create the new partition
I completely understand why I have to do this. There's files spread physically all over the drive, and backing up and restoring is the free alternative to defragging. So I use Time Machine to back up my internal drive to an external drive. The total transfer was about 330 GB. I had to leave for about three hours and left it to do its thing. When I came back, the iMac had restarted and was waiting for my password to log on. I did so and looked in Time Machine and saw that the next back was scheduled for 10:37 pm. It was set to backup every hour. Simple math tells me the last backup - the one I had left for three hours - had finished at 9:37 pm. And that made perfect sense.
I then boot the iMac from the OSX disk and use Disk Utility to erase and reformat the main drive. I did this without any qualms since I was sure the backup worked. It wiped and reformatted my drive and I go to Time Machine to restore and.......
NO BACKUP FILES ARE FOUND
The external was spinning. I could hear it doing something. So I decided to try it manually in Disk Utility. In selecting the source of the restore Image, I navigate through the external and find, not a backup file, but a ".inProgress" file. I'm guessing that the initial backup +did not+ complete correctly and I've now just lost all of my data.
Can anyone please tell me that I'm wrong?

weerez87 wrote:
When I came back, the iMac had restarted and was waiting for my password to log on.
Unless you have your Mac set to automatically log you off after a period of inactivity, your Mac should have been as you left it. It does not shut down, restart, or log you off after completing a backup.
Could there have been a power failure?
I'm guessing that the initial backup +did not+ complete
That seems likely.
and I've now just lost all of my data.
Maybe, maybe not.
Just to be sure, check the backup drive via the Finder. Be +*very careful+* using the Finder on your backups; if you accidentally move, change, or delete anything, they can be corrupted.
There should be a single Backups.backupdb folder at the top level, containing a single folder named for your Mac.
Inside that should be a folder for each backup, named with the date and time; plus a "latest" alias, plus the in.Progress file (it's actually a "package").
If there are any named, dated folders, those are completed backups; you can restore your entire system from them. See #14 in [Time Machine - Frequently Asked Questions|http://web.me.com/pondini/Time_Machine/FAQ.html] (or use the link in *User Tips* at the top of this forum).
If not, select the "in.Progress" file and see how large it is, via +Get Info.+ That may take a while; the larger it is, the more of your data is there. If it's over about 6 GB (your system folders), right-click it and select +Show Package Contents.+ It should contain the same folder structure as your internal HD; go all the way to the bottom and see how much is actually there (some of the items toward the end may be empty).
If it looks like most everything is there, you may be able to recover most of it, by drag and drop.
If not, +*stop using your internal HD.+* Unless you did a +Secure Erase,+ your stuff is still on the internal disk, and most should be recoverable, but it won't be quick or easy. See [Data Recovery|http://web.me.com/pondini/AppleTips/Recover.html].
Keep us posted.

Time Machine disk not mounting after sleep

Greetings,
I am having a problem with the external USB disk (500GB Iomega) that I have set up for Time Machine not remounting after my iMac wakes back up. Nothing I have tried, short of rebooting, seems to cause the Mac to notice the drive. I have tried turning the drive off and back on, but that didn't work, and neither did unplugging and re-plugging the USB cable. (I suppose obviously) Time Machine won't do any backups and complains that "The storage location for Time Machine backups can't be found." Time Machine Set Up says "Next Backup: When Disk is Connected." If I reboot, the disk will show up and Time Machine will commence backups, but then, after the machine sleeps, I have the same problem again.
When I first plugged the drive in last night the computer immediately recognized it, mounted it, and asked me if I wanted to use it for Time Machine. I didn't have to do anything. I then successfully started Time Machine and it did its initial and several hourly backups as expected. Then the machine went to sleep and the disk never came back (short of a reboot).
The computer is a brand new 24-inch, 2.8Ghz, iMac with Leopard installed from the included DVD immediately after opening the box - I did nothing before installing Leopard.
This is my first Mac (I am a Unix refugee) so I may very well be doing something entirely stupid, but surely external disks should still be mounted (or automount) after the computer returns from sleep. What am I doing wrong? I also don't see any way to force Leopard to mount the drive, but I probably just don't know where to look.
To be completely clear... the drive is plugged directly into the iMac on USB, no external hub. There is no networking involved with this disk. I didn't make any kind of settings to the disk (either to the disk itself- there aren't any, or on the iMac when I plugged the disk in). The only thing I did was answer "Yes" when Time Machine popped up a window asking if I wanted to use the new disk for backups. Last time the disk was mountet (before the computer went to sleep again) I ran the Disk Utility and it said the drive was fine.
Thanks,
Mark
P.S. I'm sorry if this has been discussed elsewhere but I couldn't find it. Like I say, I'm new to the Mac and to these forums, so please forgive me if this post is redundant.

Greetings,
intelligenceresigned wrote:
Ok, I went into console, and forced my iMac to sleep to see what the console would show was actually happening. I am not a very computer savvy person, but this is what the console said:
Nov 8 21:50:27 steve-freunds-computer kernel[0]: USBF: 48332.754 AppleUSBEHCI[0x52ab000]::Found a transaction past the completion deadline on bus 0xfa, timing out! (Addr: 3, EP: 2)
I believe this may be related to the problem. The AppleUSBEHCI appears to identify the offending driver/controller as the EHCI controller (Enhanced Host Controller Interface), or the controller that handles usb 2.0 High Speed (usually usb 1.1 and 2.0 Full Speed are handled by something that would be called a UHCI or Universal Host Controller Interface) USB High Speed is the fastest of the three usb speeds and although the interface is compatable with the slower speeds, works rather differently than the other two. Beyond that I'll have to look into what this message means (I'm brand new to the Mac - I've only had this one a couple of weeks).
*Could others that are seeing this problem please post how many usb ports on the computer, not total devices connected to hubs or anything, but actual, physical ports on the computer that they are using?* Experimenting a little, on mine at least, I have not had the problem discussed in this thread when only two (out of the three available) of the physical USB ports on the Mac are used. Again on mine at least, it also doesn't seem to matter what, with the exception of external hubs, is plugged into the ports. Replacing the external drive with a flash drive or iPod Touch produces the same results, so it doesn't appear to have anything to do with the Iomega drive that I started seeing the problem with - it may be that that was just the third thing I plugged in (or not - I realize that I am a sample of one).
It also seems to be that things connected to an external hub continue to work after the other two ports have failed. This is probably why most keyboards (mercifully) keep working - they are usually hubs (Apple's external ones are). I can't guarantee this however because I haven't really tested it - just observed it so far to be the case for me so far. Hubs do work differently than ordinary usb "functions" as the usb spec calls them.
Lastly...
If you have Xcode installed (assuming you have it installed in the default /Developer location) there is a tool in /Developer/Applications/Utilities called "USB Prober" that can provide some useful USB information.
In my case, once a device stops working I see the status of the non-functioning devices reported as:
High Speed device @ 2 (0xFA200000): ............................................. External HD (did not respond to inquiry - 0xe00002ed, might be Suspended)
High Speed device @ 3 (0xFA400000): ............................................. HP Color LaserJet 2605dn (did not respond to inquiry - 0xe0004051, might be Suspended)
And indeed the usb ports in question do appear to be behaving as if the host (the Mac) has them suspended - but I can't be entirely sure. I will try to look into this some more later if I can.
Thanks,
Mark
P.S. To save questions: I've tried all the easy stuff: Switched cables, swapped out the hub I have on one of the ports, tried different devices in the ports (so far an HP printer, Iomega external disk, iPod Touch, and Sony usb flash drive). Nothing resolved the issue. My keyboard and mouse are connected to a 2.0 High Speed hub. I've tried using another hub, but it didn't make any difference.

Latest Time Machine backup not Showing

Here's what I'm trying to do:
Swapping out 320 gb had on a 5,1 MacBook Pro to a 500gb hd. I DON'T have an external enclosure.
I ran another Time Machine backup last night (nov 20) before physically swapping out hard drives ( I do TM backups intermittently). My TM backups are to a FireWire attached external drive, btw, so I get the new drive in the computer, startup while holding Command-R (only works with USB connection I found out) and click on 'restore from the time machine backup'. Under Backups it shows the external drive (we'll call it 'external' )and Time Machine formatted disk image called ''Macbook Pro.tmp' on disk 'external'.
Selecting the 'MacbookPro.tmp' leads to a dialog box of "the backup cannot be opened: if this is a password-protected backup, you entered an incorrect...." in other words I go back and select the OTHER option of 'external'.
THIS gives me some time machine options but this is where my question comes in.
The only options available are from 'August 29' and 'August 23'! I JUST backed up to Time Machine on November 20! Why is the most recent backup NOT there?
If I went with the 'August 29' restore will it plug in the incremental backups I've done since then?
Please advise. I've looked on pondini.org but couldn't find an answer.

It sounds like you have two sets of backups on that drive.
Were some backups made over a network (ie, while the drive was connected to a Time Capsule, Airport Extreme, or other Mac)? That's the only way you get a disk image (unless you specifically created one).
The name "MacbookPro.tmp" sounds like the temporary name Time Machine first creates a disk image with, over a network. That would also explain why it can't be opened, as TM didn't finish creating it, but that doesn't tell us where the backup you ran on 11/20 went. Are you sure it completed normally? No error messages, etc.?
Also, did you format the new drive?

External Time Machine disk not showing up

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