Time Machine corrupting external USB hard drives

In February I installed two Mac Minis running 10.8 Server. Each machine had an external hard drive connected to it.
Sometime over the Labor Day weekend, both drives stopped working. When I came in Tuesday, each machine had a message on the screen that the Time Machine drive had been improperly ejected. I powered down both drives and then powered them back up. Here's what is going on with each machine:
Has a Western Digital 1TB drive formatted as OS X Extended Journaled.
Disk Utility is able to see the external drive; however, whenever I try to back up, I get the message "Time Machine couldn't complete the backup... Files can't be copied onto the backup disk because it appears to be read-only."
In Disk Utility, if I select the partition and Verify Disk, I get the message "Disk Utility stopped verifying Backup. Couldn't unmount disk."
When I try to reformat the drive, I get the message "Disk Erase failed. Disk Erase failed with the error: Couldn't unmount disk."
The Time Machine System Preference pane shows "None" for both oldest and latest backup times; however, I am able to enter Time Machine and see files going back to April.
Has a Segate 2TB drive formatted as OX X Extended Journaled.
Initially Disk Utility would recognize this drive about 50% of the time. I would power it down and back up. Sometimes it would appear in Disk Utility, sometimes it wouldn't. Whenever I would try to verify or repair this disk, it would immediately unmount and I would get the message that the disk was not ejected properly. When I try to backup using Time Machine, TM acts like it is preparing to back up and then the disk disappears from Disk Utility and from the Desktop and I get the message that The disk was not ejected properly.
This machine showed it was last backed up on September 1.
After fiddling with it, I was able to format the drive. After formatting the drive, I started a Time Machine backup and the drive unmounted again.
It seems that some event over the weekend caused both drives to corrupt. There was no sign of a power-outtage. Can anyone suggest how I can track down what caused this? Would there have been a maintenance script that would have run on Sept 1 that could have messed both drives up? Some other system event? Losing the data isn't a big deal. I just want to make sure I prevent whatever caused this in the future. Any tips would be much appreciated.

Yeah, I don't know much about the logs. I flipped through some using Console but didn't really know what I was looking for. I was hopeing to see an event that was followed by a notice that the USB drives had been improperly ejected since that was a message I received on both machines.
Since both machines were affected at the same time it seems logical it would be a scheduled event or, as you suggested, some power issue.

Similar Messages

  • Satellite L20-100 can be booted from external USB hard drive?

    I recently bought Toshiba Satellite L20-100 and I wonder if:
    1. is there any possibility to boot this machine from external usb hard drive?
    2. it is possible to attach another internal hard drive?
    Supposing that the both answers above are 'no', how can I solve the following problem: I need hdd space, I need to boot 3 separate Wxp Operating Systems onto the same machine (Toshiba Satellite L20-100).

    Booting from external USB HD - "No" would be the official, mcrsoft sponsored, answer. However, it is possible. Not easy but it can be done. I've seen it done with my own eyes and there are guides how to do this. Just look for it with search engine. But if you have enough disk space you better do what was suggested here - create 3 partitions and use boot manager.

  • 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 ****.
    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 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
    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

  • 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:/[email protected]/[email protected]
    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:/[email protected]/[email protected]
    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.

  • 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)?

    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!+
    +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!+
    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.

  • Time Machine doesn't see Hard drive

    I have an external USB hard drive attached to a macbook pro. When I go to set up Time Machine, the hard drive is not shown. It shows up in the Finder no problem. I have it attached through a USB hub with an AC adapter.
    Why won't it "see" it?

    try plugging it in directly without using a USB hub. also, how is the drive formatted?

  • External USB Hard Drive causes menu problem - menu items flash

    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.
    The problem is that when I connect to the drives, the menu malfunctions (I cannot see the date and time and the menu items flash). Dismounting the drives solves the problem.
    Do I need to reformat the hard drives? Or do I need a new USB drive?
    Thank you.

    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.
    In that case, you'll probably want rootdelay=* to allow the drive some time to settle, and rootfstype=* to speed up filesystem detection while in kinit.
    By the way, what filesystem do you have on that machine?  Can you tell me what
    /usr/lib/klibc/bin/fstype < /dev/sda1
    outputs on a running system (you may need to be root, or add yourself to the "disk" group or something similar) - /dev/sda1 should be replaced if the usb drive is not sda1

  • Partition External Usb hard drive

    Can I partition a 500GB external usb hard-drive to 2 partitions (nfts and HFS)
    The HFS part is for using with Time-Machine (150 GB) and the nfts for storage of photos etc. trough Windows.
    Is it possible to back-up on a partition with Time Machine?
    I know that it is impossible to partition to nfts with the standard Mac program, but it is possible with Gparted Live-cd (the one Ubuntu uses).
    Can all that be done?
    Thanks on purpose

    set up two partitions both fat32.
    erase one and reformat as the apple format. plug the drive into the winbox, use administration>computer management>storage to find and reformat the fat 32 partition as ntfs.
    you can also format both as mac, then have win reformat one (I think)

  • Is it possible to have two encrypted time machines on one partitioned hard drive?

    I am trying to use encrypted time machines for two macbooks (15" and 11") with only one USB hard drive. The problem is that after creating one encrypted time machine for my 15" in a separate partition, the hard drive does not work when plugging it into my 11".
    What happens is that I am prompted to enter in my encryption password for the 15" time machine on my 11". I enter in the correct password but it does not work (i.e., password fail). The interesting part is that when I plug the hard drive into my 15", I am asked the same thing, but the password entry works.
    This is my current setup for my 1tb usb hard drive:
    1) 400gb for data
    2) 400gb newly encrypted time machine for my 15"
    3) 200gb unencrypted time machine (with old 11" time machine backups) for my 11"
    The hard drive is formated/partitioned in RAID format.
    All I want is to be able to have two encrypted time machines for each macbook on one single hard drive. Previously I was able to maintain two separate time machines (unencrypted) on this hard drive. I decided to try and encrypt both but seems like I am getting something wrong.

    I am prompted to enter in my encryption password for the 15" time machine on my 11".
    If I understand correctly, you want to mount the other partition. Are you prompted to do that? Does the password include any characters other than plain letters and digits? Are you using the same keyboard layout on both machines?

  • HT201250 When migrating from time machine to my new hard drive, it migrates the first back-up I made several years ago. How can I migrate the latest back-up ?

    When migrating from time machine to my new hard drive, it migrates the first back-up I made several years ago. How can I migrate the latest back-up ? I need time machine to migrate the latest back-up. Should I delete the older back-ups ?

    As noondaywitch says, it should use the latest backup.
    Where are your backups (external HD, Time Capsule, etc.)?
    It sounds like there are two separate sets, and you're not connected to the right set.

  • [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

  • Does Time Machine back up USB Flash Drive?

    I have a 128GB USB Flash Drive. The contents of this flash drive was restored from a previous external SSD (used as storage and has died on me).
    Now I would like my Time Machine to backup both my MacAir and my USB Flash Drive.
    My First Concern is
    So when I plug in my USB Flash Drive, it appears in the Exclude List.
    However, after I remove the USB Flash Drive from the exclude list and click on Save.
    I start to Back Up using Time Machine.
    Does it mean that time machine will back up my USB Flash Drive for this One Time?
    Because when I open up the Time Machine preference, the USB Flash Drive re-appears in the Exclude List again.
    Second Concern
    When I open the HDD I use for Time Machine, I noticed that the latest backup consist of both my MacAir
    and the name of my Previous External SSD (instead of my current USB Flash Drive).
    I am wondering if Time Machine recognise my current USB Flash Drive as my previous external SSD
    since I restored my contents from there.
    So is my USB Flash Drive really backed up (just that Time Machine recognise it as my previous external SSD)?
    Hope someone can share their experience and advice on this.
    (Please do not recommend other app like Carbon Copy Cloner, as I already plan to use the CCC Trial.)
    Thank you to all.

    What is the format of the volume on the flash drive? It's shown in the Finder Info window.

  • Changing external USB hard drive into a FireWire Drive???

    I have been reading in some of the other discussions about how it is possible to change a USB external hard drive into a FireWire external hard drive. Is this true ??? I recently pruchased an external USB hard drive only to now find out that I cannot use it to boot from. Apparently OSX will only boot from a FireWire drive ??? Is there some way to change my current external USB hard drive into a FireWire compatible drive or do I have to purchase a FireWire drive ??? Thanks.

    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).

  • 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.
    Thanks for any help.

    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.
    The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc.  The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored. ... GeezBlog
    English Community   Deutsche Community   Comunidad en Español   Русскоязычное Сообщество

Maybe you are looking for

  • Recovering Data from Original Hard Drive

    My daughter has a 4 year old G4 iBook. It ran flawlessly for nearly 4 years, then its original 30 gig hard drive gave up the ghost and she had a new 160 gig drive installed in its place. Unfortunately, the folks who installed the new drive (an author

  • To display the list of File Name in a report region from a Directory

    Hello All, Can any one guide me in displaying the list of file name from a file system directory in a report region with link? On click of the link it should display the open/save dialog box. I will appreciate the early solution. (It is bit urgent) T

  • Greeting card software for Mac?

    So, I switched my parents over to a Mac Mini a month ago. They really like it, but they miss having their "Greetings Workshop" greeting card software from their old Windows computer. So, I'm trying to find something they can use instead. I've found a

  • Ora-0600

    Hi, We are getting this error in Oracle DB after upgrading to windows 2003 server. Redo thread mounted by this instance: 1 Oracle process number: 30 Windows thread id: 9764, image: ORACLE.EXE (SHAD) *** 2010-02-12 15:51:00.943 *** A

  • Info on Sun Ultra10 Servers, Just to be sure.

    Hello ppl, Just a couple of questions on the Ultra10 systems as i'm new to them, bare with me, k. 1, Tryed to gain access to the bios using F2 but no luck, can anyone help? 2, Is the bios firmware, is that right..? and where to get upgrades if needed