CD-ROM won't eject CD / system doesn't recognize CD-ROM drive

Hi.
My CD-ROM recently ate a CD and now refuses to eject it. The CD does not show up on the desktop (is "unmounted"?) and resetting the PRAM and holding down the mouse and eject buttons on start-up have not been the solution to this problem.
I think the main issue is the system no longer reconizes the CD-ROM drive... so I'm unsure how to 1) eject the cd and 2) reinstall the CD-ROM But obviously I can't install without a CD-ROM drive...
Is there a driver I can download to get the drive working again? Any thoughts would be greatly appreciated.

Hi
If the drive now longer shows up in ASAP, it's dead, or the power supply to it is dead.
You will need to manually eject the CD, by inserting a straightened paperclip through the small access hole located under the drive tray; it may be on the left, center or right side. Do this with the computer off.
New drives can be had for under $40 (DVD Burners) online, CD Burners are under $25.
For more info, You can read owner reviews @ xlr8yourmac's Drive Compatibility, just enter your system & choose a drive type.

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Hi there
Some days ago I bought a 1500GB external harddrive, but after plugin it in via USB, it doesn't appear in my file manager. I tested it with thunar and pcmanfm, with both it didn't work. I don't think, that it's their fault, I think HAL doesn't like my new drive. My older one with 500GB is automounted as it should be. And I also don't think, that its a hardware issue, because in an ubuntu live-session it works with both harddrives.
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255 heads, 63 sectors/track, 60801 cylinders
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Disk identifier: 0x0008941c
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255 heads, 63 sectors/track, 182401 cylinders
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Device Boot Start End Blocks Id System
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In the AUR, there appeared a new packaged called devicekit and I thought, that this might spit out some helpful informations. I used the command "devkit -m"
1500GB:
action=add @ 10:14:29.876418
device: /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-1
subsystem: usb
device file: /dev/bus/usb/001/007
symlink: /dev/char/189:6
properties:
TYPE=0/0/0
DEVNAME=/dev/bus/usb/001/007
DEVLINKS=/dev/char/189:6
BUSNUM=001
UDEV_LOG=0
MINOR=6
ACTION=add
PRODUCT=152d/2336/100
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb1/1-1
DEVICE=/proc/bus/usb/001/007
MAJOR=189
SUBSYSTEM=usb
DEVTYPE=usb_device
DEVNUM=007
SEQNUM=1668
action=add @ 10:14:29.945265
device: /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-1/1-1:1.0
subsystem: usb
device file: (none)
properties:
TYPE=0/0/0
INTERFACE=8/6/80
UDEV_LOG=0
ACTION=add
PRODUCT=152d/2336/100
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb1/1-1/1-1:1.0
DEVICE=/proc/bus/usb/001/007
SUBSYSTEM=usb
DEVTYPE=usb_interface
MODALIAS=usb:v152Dp2336d0100dc00dsc00dp00ic08isc06ip50
SEQNUM=1669
action=add @ 10:14:29.947723
device: /sys/class/scsi_host/host4
subsystem: scsi_host
device file: (none)
properties:
UDEV_LOG=0
ACTION=add
DEVPATH=/class/scsi_host/host4
SUBSYSTEM=scsi_host
SEQNUM=1670
action=add @ 10:14:29.952727
device: /sys/class/usb_endpoint/usbdev1.7_ep81
subsystem: usb_endpoint
device file: /dev/usbdev1.7_ep81
symlink: /dev/char/251:24
properties:
DEVNAME=/dev/usbdev1.7_ep81
DEVLINKS=/dev/char/251:24
UDEV_LOG=0
MINOR=24
ACTION=add
DEVPATH=/class/usb_endpoint/usbdev1.7_ep81
MAJOR=251
SUBSYSTEM=usb_endpoint
SEQNUM=1671
action=add @ 10:14:29.978530
device: /sys/class/usb_endpoint/usbdev1.7_ep02
subsystem: usb_endpoint
device file: /dev/usbdev1.7_ep02
symlink: /dev/char/251:25
properties:
DEVNAME=/dev/usbdev1.7_ep02
DEVLINKS=/dev/char/251:25
UDEV_LOG=0
MINOR=25
ACTION=add
DEVPATH=/class/usb_endpoint/usbdev1.7_ep02
MAJOR=251
SUBSYSTEM=usb_endpoint
SEQNUM=1672
action=add @ 10:14:29.986978
device: /sys/class/usb_endpoint/usbdev1.7_ep00
subsystem: usb_endpoint
device file: /dev/usbdev1.7_ep00
symlink: /dev/char/251:26
properties:
DEVNAME=/dev/usbdev1.7_ep00
DEVLINKS=/dev/char/251:26
UDEV_LOG=0
MINOR=26
ACTION=add
DEVPATH=/class/usb_endpoint/usbdev1.7_ep00
MAJOR=251
SUBSYSTEM=usb_endpoint
SEQNUM=1674
action=add @ 10:14:29.992531
device: /sys/class/usb_device/usbdev1.7
subsystem: usb_device
device file: /dev/usbdev1.7
symlink: /dev/char/189:6
properties:
DEVNAME=/dev/usbdev1.7
DEVLINKS=/dev/char/189:6
UDEV_LOG=0
MINOR=6
ACTION=add
DEVPATH=/class/usb_device/usbdev1.7
MAJOR=189
SUBSYSTEM=usb_device
SEQNUM=1673
action=add @ 10:14:34.967982
device: /sys/class/bdi/8:32
subsystem: bdi
device file: (none)
properties:
UDEV_LOG=0
ACTION=add
DEVPATH=/class/bdi/8:32
SUBSYSTEM=bdi
SEQNUM=1679
action=add @ 10:14:35.048659
device: /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-1/1-1:1.0/host4/target4:0:0/4:0:0:0
subsystem: scsi
device file: (none)
properties:
UDEV_LOG=0
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb1/1-1/1-1:1.0/host4/target4:0:0/4:0:0:0
SUBSYSTEM=scsi
DEVTYPE=scsi_device
MODALIAS=scsi:t-0x00
SEQNUM=1675
action=add @ 10:14:35.049786
device: /sys/class/scsi_disk/4:0:0:0
subsystem: scsi_disk
device file: (none)
properties:
UDEV_LOG=0
ACTION=add
DEVPATH=/class/scsi_disk/4:0:0:0
SUBSYSTEM=scsi_disk
SEQNUM=1676
action=add @ 10:14:35.051976
device: /sys/class/scsi_device/4:0:0:0
subsystem: scsi_device
device file: (none)
properties:
UDEV_LOG=0
ACTION=add
DEVPATH=/class/scsi_device/4:0:0:0
SUBSYSTEM=scsi_device
SEQNUM=1680
action=add @ 10:14:35.060884
device: /sys/class/scsi_generic/sg3
subsystem: scsi_generic
device file: /dev/sg3
symlink: /dev/char/21:3
properties:
DEVNAME=/dev/sg3
DEVLINKS=/dev/char/21:3
UDEV_LOG=0
MINOR=3
ACTION=add
DEVPATH=/class/scsi_generic/sg3
MAJOR=21
SUBSYSTEM=scsi_generic
SEQNUM=1681
action=add @ 10:14:35.067457
device: /sys/class/bsg/4:0:0:0
subsystem: bsg
device file: /dev/bsg/4:0:0:0
symlink: /dev/char/254:3
properties:
DEVNAME=/dev/bsg/4:0:0:0
DEVLINKS=/dev/char/254:3
UDEV_LOG=0
MINOR=3
ACTION=add
DEVPATH=/class/bsg/4:0:0:0
MAJOR=254
SUBSYSTEM=bsg
SEQNUM=1682
action=add @ 10:14:35.105877
device: /sys/block/sdc
subsystem: block
device file: /dev/sdc
symlink: /dev/block/8:32
symlink: /dev/disk/by-id/usb-ST315003_41AS_908888888888-0:0
symlink: /dev/disk/by-path/pci-0000:00:1d.7-usb-0:1:1.0-scsi-0:0:0:0
properties:
ID_SERIAL_SHORT=908888888888
DEVNAME=/dev/sdc
DEVLINKS=/dev/block/8:32 /dev/disk/by-id/usb-ST315003_41AS_908888888888-0:0 /dev/disk/by-path/pci-0000:00:1d.7-usb-0:1:1.0-scsi-0:0:0:0
ID_MODEL=41AS
ID_SERIAL=ST315003_41AS_908888888888-0:0
ID_INSTANCE=0:0
UDEV_LOG=0
ID_PATH=pci-0000:00:1d.7-usb-0:1:1.0-scsi-0:0:0:0
MINOR=32
ACTION=add
ID_VENDOR=ST315003
ID_BUS=usb
DEVPATH=/block/sdc
ID_TYPE=disk
ID_REVISION=0100
MAJOR=8
SUBSYSTEM=block
DEVTYPE=disk
SEQNUM=1677
action=add @ 10:14:35.144133
device: /sys/block/sdc/sdc1
subsystem: block
device file: /dev/sdc1
symlink: /dev/block/8:33
symlink: /dev/disk/by-id/usb-ST315003_41AS_908888888888-0:0-part1
symlink: /dev/disk/by-path/pci-0000:00:1d.7-usb-0:1:1.0-scsi-0:0:0:0-part1
symlink: /dev/disk/by-uuid/8a60b3b7-50bc-48a7-b3ba-aa0f13f32156
symlink: /dev/disk/by-label/1500GB
properties:
ID_SERIAL_SHORT=908888888888
ID_FS_LABEL=1500GB
ID_FS_LABEL_ENC=1500GB
DEVNAME=/dev/sdc1
DEVLINKS=/dev/block/8:33 /dev/disk/by-id/usb-ST315003_41AS_908888888888-0:0-part1 /dev/disk/by-path/pci-0000:00:1d.7-usb-0:1:1.0-scsi-0:0:0:0-part1 /dev/disk/by-uuid/8a60b3b7-50bc-48a7-b3ba-aa0f13f32156 /dev/disk/by-label/1500GB
ID_MODEL=41AS
ID_SERIAL=ST315003_41AS_908888888888-0:0
ID_INSTANCE=0:0
UDEV_LOG=0
ID_PATH=pci-0000:00:1d.7-usb-0:1:1.0-scsi-0:0:0:0
MINOR=33
ACTION=add
ID_VENDOR=ST315003
ID_BUS=usb
DEVPATH=/block/sdc/sdc1
ID_TYPE=disk
ID_REVISION=0100
ID_FS_USAGE=filesystem
MAJOR=8
SUBSYSTEM=block
ID_FS_TYPE=xfs
ID_FS_UUID=8a60b3b7-50bc-48a7-b3ba-aa0f13f32156
DEVTYPE=partition
SEQNUM=1678
ID_FS_UUID_ENC=8a60b3b7-50bc-48a7-b3ba-aa0f13f32156
500GB:
action=add @ 10:13:40.628381
device: /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-2
subsystem: usb
device file: /dev/bus/usb/001/006
symlink: /dev/char/189:5
properties:
TYPE=0/0/0
DEVNAME=/dev/bus/usb/001/006
DEVLINKS=/dev/char/189:5
BUSNUM=001
UDEV_LOG=0
MINOR=5
ACTION=add
PRODUCT=1058/910/106
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb1/1-2
DEVICE=/proc/bus/usb/001/006
MAJOR=189
SUBSYSTEM=usb
DEVTYPE=usb_device
DEVNUM=006
SEQNUM=1653
action=add @ 10:13:40.700691
device: /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-2/1-2:1.0
subsystem: usb
device file: (none)
properties:
TYPE=0/0/0
INTERFACE=8/6/80
UDEV_LOG=0
ACTION=add
PRODUCT=1058/910/106
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb1/1-2/1-2:1.0
DEVICE=/proc/bus/usb/001/006
SUBSYSTEM=usb
DEVTYPE=usb_interface
MODALIAS=usb:v1058p0910d0106dc00dsc00dp00ic08isc06ip50
SEQNUM=1654
action=add @ 10:13:40.701744
device: /sys/class/scsi_host/host3
subsystem: scsi_host
device file: (none)
properties:
UDEV_LOG=0
ACTION=add
DEVPATH=/class/scsi_host/host3
SUBSYSTEM=scsi_host
SEQNUM=1655
action=add @ 10:13:40.702982
device: /sys/class/usb_endpoint/usbdev1.6_ep81
subsystem: usb_endpoint
device file: /dev/usbdev1.6_ep81
symlink: /dev/char/251:21
properties:
DEVNAME=/dev/usbdev1.6_ep81
DEVLINKS=/dev/char/251:21
UDEV_LOG=0
MINOR=21
ACTION=add
DEVPATH=/class/usb_endpoint/usbdev1.6_ep81
MAJOR=251
SUBSYSTEM=usb_endpoint
SEQNUM=1656
action=add @ 10:13:40.705026
device: /sys/class/usb_endpoint/usbdev1.6_ep02
subsystem: usb_endpoint
device file: /dev/usbdev1.6_ep02
symlink: /dev/char/251:22
properties:
DEVNAME=/dev/usbdev1.6_ep02
DEVLINKS=/dev/char/251:22
UDEV_LOG=0
MINOR=22
ACTION=add
DEVPATH=/class/usb_endpoint/usbdev1.6_ep02
MAJOR=251
SUBSYSTEM=usb_endpoint
SEQNUM=1657
action=add @ 10:13:40.709720
device: /sys/class/usb_endpoint/usbdev1.6_ep00
subsystem: usb_endpoint
device file: /dev/usbdev1.6_ep00
symlink: /dev/char/251:23
properties:
DEVNAME=/dev/usbdev1.6_ep00
DEVLINKS=/dev/char/251:23
UDEV_LOG=0
MINOR=23
ACTION=add
DEVPATH=/class/usb_endpoint/usbdev1.6_ep00
MAJOR=251
SUBSYSTEM=usb_endpoint
SEQNUM=1659
action=add @ 10:13:40.719258
device: /sys/class/usb_device/usbdev1.6
subsystem: usb_device
device file: /dev/usbdev1.6
symlink: /dev/char/189:5
properties:
DEVNAME=/dev/usbdev1.6
DEVLINKS=/dev/char/189:5
UDEV_LOG=0
MINOR=5
ACTION=add
DEVPATH=/class/usb_device/usbdev1.6
MAJOR=189
SUBSYSTEM=usb_device
SEQNUM=1658
action=add @ 10:13:45.659241
device: /sys/class/bdi/8:16
subsystem: bdi
device file: (none)
properties:
UDEV_LOG=0
ACTION=add
DEVPATH=/class/bdi/8:16
SUBSYSTEM=bdi
SEQNUM=1664
action=add @ 10:13:45.680716
device: /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-2/1-2:1.0/host3/target3:0:0/3:0:0:0
subsystem: scsi
device file: (none)
properties:
UDEV_LOG=0
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:1d.7/usb1/1-2/1-2:1.0/host3/target3:0:0/3:0:0:0
SUBSYSTEM=scsi
DEVTYPE=scsi_device
MODALIAS=scsi:t-0x00
SEQNUM=1660
action=add @ 10:13:45.681808
device: /sys/class/scsi_disk/3:0:0:0
subsystem: scsi_disk
device file: (none)
properties:
UDEV_LOG=0
ACTION=add
DEVPATH=/class/scsi_disk/3:0:0:0
SUBSYSTEM=scsi_disk
SEQNUM=1661
action=add @ 10:13:45.695199
device: /sys/class/scsi_device/3:0:0:0
subsystem: scsi_device
device file: (none)
properties:
UDEV_LOG=0
ACTION=add
DEVPATH=/class/scsi_device/3:0:0:0
SUBSYSTEM=scsi_device
SEQNUM=1665
action=add @ 10:13:45.703093
device: /sys/class/scsi_generic/sg2
subsystem: scsi_generic
device file: /dev/sg2
symlink: /dev/char/21:2
properties:
DEVNAME=/dev/sg2
DEVLINKS=/dev/char/21:2
UDEV_LOG=0
MINOR=2
ACTION=add
DEVPATH=/class/scsi_generic/sg2
MAJOR=21
SUBSYSTEM=scsi_generic
SEQNUM=1666
action=add @ 10:13:45.709314
device: /sys/class/bsg/3:0:0:0
subsystem: bsg
device file: /dev/bsg/3:0:0:0
symlink: /dev/char/254:2
properties:
DEVNAME=/dev/bsg/3:0:0:0
DEVLINKS=/dev/char/254:2
UDEV_LOG=0
MINOR=2
ACTION=add
DEVPATH=/class/bsg/3:0:0:0
MAJOR=254
SUBSYSTEM=bsg
SEQNUM=1667
action=add @ 10:13:45.773375
device: /sys/block/sdb
subsystem: block
device file: /dev/sdb
symlink: /dev/block/8:16
symlink: /dev/disk/by-id/usb-WD_5000AAK_External_574341505730373832303839-0:0
symlink: /dev/disk/by-path/pci-0000:00:1d.7-usb-0:2:1.0-scsi-0:0:0:0
properties:
ID_SERIAL_SHORT=574341505730373832303839
DEVNAME=/dev/sdb
DEVLINKS=/dev/block/8:16 /dev/disk/by-id/usb-WD_5000AAK_External_574341505730373832303839-0:0 /dev/disk/by-path/pci-0000:00:1d.7-usb-0:2:1.0-scsi-0:0:0:0
ID_MODEL=5000AAK_External
ID_SERIAL=WD_5000AAK_External_574341505730373832303839-0:0
ID_INSTANCE=0:0
UDEV_LOG=0
ID_PATH=pci-0000:00:1d.7-usb-0:2:1.0-scsi-0:0:0:0
MINOR=16
ACTION=add
ID_VENDOR=WD
ID_BUS=usb
DEVPATH=/block/sdb
ID_TYPE=disk
ID_REVISION=1.06
MAJOR=8
SUBSYSTEM=block
DEVTYPE=disk
SEQNUM=1662
action=add @ 10:13:45.839326
device: /sys/block/sdb/sdb1
subsystem: block
device file: /dev/sdb1
symlink: /dev/block/8:17
symlink: /dev/disk/by-id/usb-WD_5000AAK_External_574341505730373832303839-0:0-part1
symlink: /dev/disk/by-path/pci-0000:00:1d.7-usb-0:2:1.0-scsi-0:0:0:0-part1
symlink: /dev/disk/by-uuid/442a9a4c-ffd4-4d7f-b966-8c2935f7928f
symlink: /dev/disk/by-label/500GB
properties:
ID_SERIAL_SHORT=574341505730373832303839
ID_FS_LABEL=500GB
ID_FS_LABEL_ENC=500GB
DEVNAME=/dev/sdb1
DEVLINKS=/dev/block/8:17 /dev/disk/by-id/usb-WD_5000AAK_External_574341505730373832303839-0:0-part1 /dev/disk/by-path/pci-0000:00:1d.7-usb-0:2:1.0-scsi-0:0:0:0-part1 /dev/disk/by-uuid/442a9a4c-ffd4-4d7f-b966-8c2935f7928f /dev/disk/by-label/500GB
ID_MODEL=5000AAK_External
ID_SERIAL=WD_5000AAK_External_574341505730373832303839-0:0
ID_INSTANCE=0:0
UDEV_LOG=0
ID_PATH=pci-0000:00:1d.7-usb-0:2:1.0-scsi-0:0:0:0
MINOR=17
ACTION=add
ID_VENDOR=WD
ID_BUS=usb
DEVPATH=/block/sdb/sdb1
ID_TYPE=disk
ID_REVISION=1.06
ID_FS_USAGE=filesystem
MAJOR=8
SUBSYSTEM=block
ID_FS_TYPE=jfs
ID_FS_UUID=442a9a4c-ffd4-4d7f-b966-8c2935f7928f
DEVTYPE=partition
SEQNUM=1663
ID_FS_UUID_ENC=442a9a4c-ffd4-4d7f-b966-8c2935f7928f
I hope someone finds some useful informations in these lines!
If you have some other test tools or command lines or whatever I could do to give you more or better informations, please let me know!
p.s.: Right in this moment I was thinking about recompiling HAL with less patches, but even Arch uses many, so I'm not really sure which one or which combination could even be the reason. But I'll try it without any patch now right after posting this thread.

I'm having a problem kind of like this. I have a 1TB Western Digital MyBook. It has the option of running in RAID0 or RAID1. I have it in RAID0 for more storage. My computer seems to find it, but it doesn't mount and it doesn't show up in /dev/.
Here's what dmesg says when I plug it in
usb 1-2: new high speed USB device using ehci_hcd and address 9
usb 1-2: configuration #1 chosen from 1 choice
input: Western Digital My Book as /class/input/input9
generic-usb 0003:1058:0905.0004: input,hidraw3: USB HID v1.11 Device [Western Digital My Book] on usb-0000:00:1d.7-2/input1
Initializing USB Mass Storage driver...
scsi2 : SCSI emulation for USB Mass Storage devices
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
usb-storage: device found at 9
usb-storage: waiting for device to settle before scanning
scsi 2:0:0:0: Enclosure WD My Book Device 104a PQ: 0 ANSI: 4
scsi 2:0:0:0: Attached scsi generic sg2 type 13
usb-storage: device scan complete
tail /var/log/messages.log gives
Feb 17 18:33:57 sage usb 1-2: new high speed USB device using ehci_hcd and address 9
Feb 17 18:33:57 sage usb 1-2: configuration #1 chosen from 1 choice
Feb 17 18:33:57 sage input: Western Digital My Book as /class/input/input9
Feb 17 18:33:57 sage generic-usb 0003:1058:0905.0004: input,hidraw3: USB HID v1.11 Device [Western Digital My Book] on usb-0000:00:1d.7-2/input1
Feb 17 18:33:57 sage Initializing USB Mass Storage driver...
Feb 17 18:33:57 sage scsi2 : SCSI emulation for USB Mass Storage devices
Feb 17 18:33:57 sage usbcore: registered new interface driver usb-storage
Feb 17 18:33:57 sage USB Mass Storage support registered.
Feb 17 18:34:02 sage scsi 2:0:0:0: Enclosure WD My Book Device 104a PQ: 0 ANSI: 4
Feb 17 18:34:02 sage scsi 2:0:0:0: Attached scsi generic sg2 type 13
Feb 17 18:34:02 sage load-modules.sh: 'scsi:t-0x0d' is not a valid module or alias name
The last line says that it can't find the "scsi:t-0x0d" module, but I can't find what I would need to enable to get that module. I can't find any related modules in the standard arch modules either. I'm using a custom kernel and I can't boot the standard arch kernel to test because it says something like "/dev/sda5" cannot be found and then it panics (the same startup options work fine on my custom kernel, the standard flips out for some reason).

HT203177 Time machine doesn't recognize my hard drive archive

I have time machine archive on a hard drive (not time capsule). It recently stopped backing up. On checking, time machine recognizes the hard drive (in preferences it is listed as the back up drive.) The files appear to be present on looking into the drive, but Time Machine doesn't recognize that there are backup files there, it wants to complete another full backup. Meaning - it says for latest backup: "none".
I am afraid if I do another full backup, I will lose the ability to access the older backups.
When I try to access older files through time machine, it predictably cannot find them.
How do I tell Time Machine that the files on that hard drive are the backup files?

Update:
1) Right click on TM icon - Menu choice "Browse other TM disks" allows me to see the data - i.e. it is a valid TM archive, not corrupted.
2) Looking at TM preferences immediately after showed the proper disk was targeted, but still Latest backup: None.
3) Shut down, anomalous shut down -required power button hit. (AHH - the problem??)
4) restart using command - R works - i.e recognizes the disk and emergency recovery system software
5) Restart - Still shows latest backup: None
6) trying to access data through standard TM startup shows data now.
7) go back to preferences - still no backup shown.
Aside - I can't recall what the purple vs white dates on right side of the screen signify, and can't find it in the documentation right now. Anybody know?

Time machine doesn't recognize external hard drive

Recently I went to the apple store to get help to switch from Mavericks to Mountain Lion (I had some problems with Mavericks). They used time machine to bring back my applications (from my external hard drive, LaCie) on the Mountain Liion software. They said my time machine/external hard drive should work the same when I got home. Now, when I go to back up my computer, time machine doesn't recognize that I've backed up my files before. In the past, when time machine was working, every time I plugged in my hard drive the icon for it would turn blue, time machine recognized it, and it would back up my files. Now, the icon for the hard drive shows up, but time machine doesn't recognize it.
Some other things:
- when I open my external hard drive on finder, it shows all of my previous back ups
- I used disk utility to check my hard drive and macintosh HD - both are OK
How can I use time machine to continue backing up files? Or am I going to have to partition or erase the hard drive and start a new back up?
Thank you in advance

nevermind! time machine suddenly recognized the disk after half an hour. sorry, I don't know how to delete this post!

My computer came back from apple, the computer doesn't recognize the hard drive, or let me login, what's wrong with it?

It doesn't recognize me

I just experienced this exact same issue with my early 2011 15" macbook pro. Since like a month after purchasing it I had issues with the screen randomly going dark on me. I sent it in for repair inder waranty they replaced the gpu and logic board but I continued to have the same issues with the screen randomly going black sometimes I would need to reboot it in order to get the screen to go back on but it happened so infrequently and I used the computer for school so disnt find the time to resend it in to apple. Just last night the screen started to display the blue screen with black verticle lines on it. I called apple and explained to them the issues that had been ongoing since I purchased the laptop but they said because I was now outside of warantee that any repairs at thia point wouldn't be covered. Fml so glad I spent 2200 on this future proof macbook pro what a joke my sister purchased a toshiba laptop for 300 4 years ago and it still running like a champ. I loved my macbook but at the price I paid I expect it to last longer than 2 years before leaving me high and dry. *** apple??

The Toshiba website doesn't recognize my hard drive's serial number and P/N

Hello,
I bought my Toshiba Canvio Basics 3.0 hard drive from Amazon a little under two months ago. The hard drive stopped working for some reason (I didn't drop it or anything, it just stopped working).
I was of course trying to use my warranty to fix it or exchange it, but the Toshiba website doesn't recognize my serial number and product number. They're right there, black and white on the sticker on the back of my hard drive, but the website says they're invalid.
Anyone has any clue what's going on? I'd rather not throw 50 euros out the window for less than two months of use.
Product number is HDTB105XK3AA -- and not HDTB105*E*K3AA as some websites say (including Amazon).
Thanks for your help.

Just adding to the above comments, I have a simialr issue. bought a 3gb drive from amazon and now 8 months later it has just stopped working (wont power up at all) again it has just sat new to my computer working fine for the last 8 months and has now just stopped.
I contacted amazon and got this reply from the seller:
"Hi Jack,
Thanks for your e-mail and apologies for the problems with your laptop. Your laptop comes with a 1 year manufacturer warranty directly with Toshiba so they should be able to resolve this for you. Their customer contact number is 0333 222 7444 or if you prefer to go online the Toshiba Computer Support website (http://www.toshiba.co.uk/innovation/generic/computing-support/) has full contact/ e-mail options.
Kind regards,
Customer service Team"
So came here to try and find more details but cannot find the model or anything regarding warranty, any assistance glady recieved

Solve Drive self-ejects and System Hangs when using MULTIPLE external drives!

I've discovered what I think is the underlying reason for many folks reporting similar problems. I bet that I can predict the GUIDs of the drives/docks/cases you're having trouble with! I bet that if you look in Disk Utility, if you click on the drives, you'll find "Connection ID 13757101839304263"!
Oh and if you look in System Profiler and click on 'FireWire' or 'USB' you'll find the GUID 0x30E002E0454647 !
What are the odds? I shouldn't be able to predict them; theyr'e supposed to be unique, after all, but google that number and you'll see that a great many devices all use that GUID.   (13757101839304263 in decimal is the same thing as 30E002E0454647 in hex.)
Mac OS seems to rely on them to be unique, and has fits when they aren't. I haven't found a total solution yet, but in the meantime, running this in Terminal can help:
sudo kextload /System/Library/Extensions/IOFireWireFamily.kext/Contents/PlugIns/AppleFWOHCI.k ext/
Sometimes it helps to run this first to unload before loading the kext (kernel extension):
sudo kextunload /System/Library/Extensions/IOFireWireFamily.kext/Contents/PlugIns/AppleFWOHCI.k ext/
Enter your password if/when prompted, of course.
In most cases, if you contact your hard drive manufacturer, they'll provide a utility that will fix the drive so that it actually has a truly unique GUID.
I'm mad at Cavalry for hiding the problem and refusing to fix it, W.R.T. the two 1TB HDs I bought from them for around $500, when that was the going price.
I figured it'd be helpful to create a user tip off the discussion in this thread: Disk Drive ejecting itself - https://discussions.apple.com/thread/2151621?start=615&tstart=0     This is my first attempt to create a tip. I'm not sure I'm doing it right, but here goes.

Sorry but this is just a really bad idea.
1. The airport is ancient.. your speed will be terrible.
2. Hubs filled with USB drives are never reliable.. disks refuse to spin up.. become unavailable.
No.. don't do it.
Plug USB3 hub into the mini and use multiple decent hard drives .. that is fine.. use thunderbolt hub.. use thunderbolt drives if you can afford it.. but never use USB drives on the network.
3. Time Machine is not reliable to external drive on Airport Extreme.. Apple do not support it in any Extreme except the latest one.
If you want the material available to the network buy a NAS. You can buy a cheap NAS of 8TB or so and another 8TB of USB drives which you plug into the NAS for backup.. however.. iphoto is not supposed to ever be put on network drives..
Apple explicitly states you will corrupt it.
http://support.apple.com/kb/TS5168 Although mostly about FAT32           it adds network drives.
http://support.apple.com/kb/HT1198
And I quote
It's recommended that you store your iPhoto library on a locally mounted hard drive. Storing your iPhoto library on a network share can lead to poor performance, data corruption, or data loss. If you use both iPhoto and Aperture with the same library, using a Mac OS X Extended formatted volume is recommended. For more information, see Aperture: Use locally mounted Mac OS X Extended volumes for your Aperture library.
For backup of the drives.. use Carbon Copy Cloner.. it is much better than TM as you can setup different job.. TM is really a single function.. !!

HELP: System doesn't recognize DVDs

In the middle of watching a rented commercial movie DVD with DVD Player, it suddenly stopped and gave an error message that it didn't recognize the media type. I have watched dozens of such DVDs with my PowerBook, with no problems.
Now, no formatted DVDs are recognized at all in the SuperDrive. This includes my OS X 10.4 Install DVD, so now I can't do any Disk repairs.
1) I tested the DVD on my wife's G4 iBook: no problems
2) I tried other DVDs: none are recognized
2) I checked that DVD Player's Preferences were appropriately selected
3) I trashed those prefs, thinking corruption, re-booted, but the problem persists
4) CDs, however, such as my MP3 CDs, ARE recognized and play just fine.
All advice is welcome.

Carolyn's suggestion is a good place to start, but I see you said it is now happening with every DVD you use?
Are your install disks on DVD? If so is Install Disk 1 recognized on the Desktop when you insert it? If it is a DVD but isn't recognized there, do the following:
1. Eject any disks in the computer and shut it down.
2. Turn on the computer and immediately press and hold the Option key down. Don't let go until you see an icon for your hard drive on the screen along with two arrow buttons (one curves and the other points right).
3. Wait for the normal arrow cursor to appear and then insert Install Disk 1. Once the disk is in the computer, click on the curving arrow button. This will cause the computer to scan for bootable disks and show them on the screen. If the Install DVD doesn't show on screen by the time the arrow cursor comes back, then you may have a faulty SuperDrive.
A couple of other things you can try:
a. Reset the PRAM.
b. Reset the PMU.
If your computer is still not recognizing DVDs then you'll want to have a professional take a look at it.
Out of curiousity, does it recognize CDs fine?

My ipod touch is disabled and won't turn off, itunes doesn't recognize the device and i can't see the serial number on the back

My NOSY (now ex) husband did something to my ipod touch and it is now disabled. It was dead and I charged it and NOW the sucker won't turn off. When I connect to itunes i see a message that says i have to UNLOCK it with a passcode. I tried to get apple support but they want my serial number. Well...the ipod wont turn on!!! I've had it at least 6 years and have moved and I can't find my paperwork and WHO can read that serial number on the back? I know its kind of outdated (third generation, I believe)but its mine, I love it and it has ALL my music on it.

Disabled
Place the iOS device in Recovery Mode and then connect to your computer and restore via iTunes. The iPod will be erased.
iOS: Wrong passcode results in red disabled screen
If recovery mode does not work try DFU mode.
How to put iPod touch / iPhone into DFU mode « Karthik's scribblings
For how to restore:
iTunes: Restoring iOS software
To restore from backup see:
iOS: Back up and restore your iOS device with iCloud or iTunes
If you restore from iCloud backup the apps will be automatically downloaded. If you restore from iTunes backup the apps and music have to be in the iTunes library since synced media like apps and music are not included in the backup of the iOS device that iTunes makes.
You can redownload most iTunes purchases by:
Downloading past purchases from the App Store, iBookstore, and iTunes Store
If problem what happens or does not happen and when in the instructions? When you successfully get the iPod in recovery mode and connect to computer iTunes should say it found an iPod in recovery mode.

CD-ROM won't eject CD / system doesn't recognize CD-ROM drive

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