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disk utility

765 Views 11 Replies Latest reply: Jun 26, 2012 4:32 PM by baltwo RSS
lutra Level 1 Level 1 (0 points)
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Jun 21, 2012 6:54 PM

Greetings!

I am in process of upgrading my operating systems. I backed up my important files to an external drive yesterday. I used a WD passport for Mac drive. It went successfully and I ejected that drive from my computer then before continuing on with my upgrades. APPLE sent me a copy of Snow Leopard and I was able to download that successfully this afternoon. After doing a software update I went into DISK UTILTY to do a repair disk permissions on my Mac HD. I was advised to do this after software updates.

 

Anyway, within that window of DISK UTILTY on the left where it lists the various "DRIVES" on your computer, beside the Macintosh HD and OPTIARC DVD RW AD-5, I now noticed that it also list a 320.07 GB WDC WD 320 Drive....... and this is probably a dumb question. Is this normal to show up even though it is not attached to my computer via USB at the moment? Is this just because I did hook it up so it is "ready" for the next time, so to speak?

iMac, Mac OS X (10.6.8)
  • baltwo Level 9 Level 9 (59,150 points)
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    Jun 21, 2012 7:26 PM (in response to lutra)

    If it's listed below the OPTIARC DVD drive, select it, and click on Eject button. If anything from it still remains, select and drag it out of DU's window. That should eliminate it from DU. If it's powered off, it shouldn't show up in DU.

    27" i7 iMac 10.6.8, Mac OS X (10.7.4), G4 450 MP w/Leopard, 9.2.2
  • baltwo Level 9 Level 9 (59,150 points)
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    Jun 21, 2012 10:57 PM (in response to lutra)

    OK. That makes more sense. Now, select the WD HD and select unmount. That might not work, since you unpowered that HD. The normal sequence is to select the HD, eject it, then unmount its volumes, then unpower it.

    27" i7 iMac 10.6.8, Mac OS X (10.7.4), G4 450 MP w/Leopard, 9.2.2
  • R C-R Level 6 Level 6 (13,825 points)
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    Jun 23, 2012 5:04 PM (in response to lutra)

    lutra wrote:

    Actually within the DU window, on the left it is listed in the following order:

     

    320.07 GB WDC WD320.............

     

        Macintosh HD

     

    OPTIARC DVD RW AD-5

    Is "Macintosh HD" indented under "320.07 GB WDC WD320" like you show above? If so, & there is no other drives listed above or in addition to what you show, then that first 'WDC' listing is not your external drive. It is the internal drive that contains the Macintosh HD volume that your computer is running from (known as the startup or boot disk).

     

    It is a bit confusing but a volume is a subdivision of a hard drive with its own name. A hard drive can have more than one volume, so to indicate this Disk Utility first lists the drive itself (here the "320.07 GB WDC WD320" part), & then indented below it all of its volumes (here just "Macintosh HD.")

     

    If I'm guessing right about this, when you plug in your external drive, you will see at least two more entries in the list, one for the drive itself & indented below that one for its named volume.

  • baltwo Level 9 Level 9 (59,150 points)
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    Jun 23, 2012 8:59 PM (in response to lutra)

    lutra wrote:

    They said that this is a feature of Mac's plug and play and this would always be there since I had plugged in the WD PASSPORT DRIVE to be recognized the next time.

    I've never unplugged an ext HD without first ejecting and unmounting its volumes, so that's news to me.

    27" i7 iMac 10.6.8, Mac OS X (10.7.4), G4 450 MP w/Leopard, 9.2.2
  • baltwo Level 9 Level 9 (59,150 points)
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    Jun 25, 2012 5:56 PM (in response to lutra)

    I just did another check. Launch DU, select the ext HD, not any of its volumes, click the Eject button, and wait until all volumes display their native icons, matching the ext HD, then power it down. What might have happened is that the WD HD didn't fully unmount the volumes and that's what caused your issue.

    27" i7 iMac 10.6.8, Mac OS X (10.7.4), G4 450 MP w/Leopard, 9.2.2
  • R C-R Level 6 Level 6 (13,825 points)
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    Jun 25, 2012 8:26 PM (in response to lutra)

    lutra wrote:

    Yes, R-C-R-, it is indented as I showed. And yes, I do see two more entries when I plug in my WD PASSPORT external hard drive. I never saw the top drive, though, until using the Passport drive to copy some folders onto.

    Whether you saw it or not, everything indented below "320.07 GB WDC WD320" is a part of that drive & has nothing to do with the Passport drive, which when connected & powered up will also show both the drive itself & any volumes it contains.

     

    As BALTWO said, perhaps I did not do the eject process correctly? I only did a right click on the WD PASSPORT and selected eject. Waited for the light to go to off and unplugged the USB cable.

    Its sounds like you did the eject process correctly. If you had not, when you unplugged the USB cable the OS should have warned you about improperly disconnecting the drive. If that didn't happen, I don't think you have anything to worry about.

    BUT BALTWO says there is more to the process.

    Not exactly. He is talking about the remote possibility that some volume on the Passport did not "fully unmount." I'm not exactly sure what he means by that but I think it is about powering it down or disconnecting a drive before every open file on it can be closed, which is part of the unmount process. As long as you wait a few seconds after all drive activity stops before unplugging it, you have done all that is required.

  • baltwo Level 9 Level 9 (59,150 points)
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    Jun 26, 2012 4:32 PM (in response to R C-R)

    R C-R wrote:

    Not exactly. He is talking about the remote possibility that some volume on the Passport did not "fully unmount." I'm not exactly sure what he means by that but I think it is about powering it down or disconnecting a drive before every open file on it can be closed, which is part of the unmount process.

    That's exactly what I mean. I have a FWHD w/eight volumes. If I mount it and then launch Disk Utility, select the HD, not it's volumes, and select Eject, I note that it takes a few moments for all the volumes to unmount. If you don't wait, then you'll usually get the dreaded unmounted incorrectly message, either when doing it or when reconnecting. That's why I always use the DU method; it provides a visual display of what's occurring.

    27" i7 iMac 10.6.8, Mac OS X (10.7.4), G4 450 MP w/Leopard, 9.2.2

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