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<blockquote data-quote="bayankaran" data-source="post: 1804495" data-attributes="member: 400950">Thank you. I am now typing from the MacBook. The Macintosh HD comes and goes. Its a 500GB disk, and 21 MB free space!Here's a log of the Disk Utility...it showed the drive. When I ran &quot;df&quot; command from terminal the Macintosh HD on Disk Utility disappeared! *********2018-10-30 21:09:26 -0400: Disk Utility started.2018-10-30 21:20:49 -0400: Verifying and repairing partition map for “APPLE HDD HTS545050A7E362 Media”2018-10-30 21:20:49 -0400: Starting repair tool: 2018-10-30 21:20:49 -0400: Checking prerequisites2018-10-30 21:23:43 -0400: Problems were encountered during repair of the partition map2018-10-30 21:23:43 -0400: Error: Some information was unavailable during an internal lookup.2018-10-30 21:23:43 -0400: 2018-10-30 21:23:43 -0400: : Some information was unavailable during an internal lookup.2018-10-30 21:23:43 -0400: [DUDiskController mountDisk] expecting DUDisk, but got nil2018-10-30 21:23:43 -0400: Verify and Repair volume “Macintosh HD”2018-10-30 21:23:43 -0400: Starting repair tool: 2018-10-30 21:23:43 -0400: Repairing volume failed: Disk object invalid or unable to serialize.I think we might be able to salvage the HD. Tho I am not sure how.</blockquote>

[QUOTE="bayankaran, post: 1804495, member: 400950"] Thank you. I am now typing from the MacBook. The Macintosh HD comes and goes. Its a 500GB disk, and 21 MB free space! Here's a log of the Disk Utility...it showed the drive. When I ran "df" command from terminal the Macintosh HD on Disk Utility disappeared! ********* 2018-10-30 21:09:26 -0400: Disk Utility started. 2018-10-30 21:20:49 -0400: Verifying and repairing partition map for “APPLE HDD HTS545050A7E362 Media” 2018-10-30 21:20:49 -0400: Starting repair tool: 2018-10-30 21:20:49 -0400: Checking prerequisites 2018-10-30 21:23:43 -0400: Problems were encountered during repair of the partition map 2018-10-30 21:23:43 -0400: Error: Some information was unavailable during an internal lookup.2018-10-30 21:23:43 -0400: 2018-10-30 21:23:43 -0400: : Some information was unavailable during an internal lookup. 2018-10-30 21:23:43 -0400: [DUDiskController mountDisk] expecting DUDisk, but got nil 2018-10-30 21:23:43 -0400: Verify and Repair volume “Macintosh HD” 2018-10-30 21:23:43 -0400: Starting repair tool: 2018-10-30 21:23:43 -0400: Repairing volume failed: Disk object invalid or unable to serialize. I think we might be able to salvage the HD. Tho I am not sure how. [/QUOTE]

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