There are no signs of anything wrong the previous days that I’ve used it and also no damage done externally. I’ve only used the SSD for 2 months and I’ve always left my external SSD connected to my laptop. fdisk doesn't do anything.Īny ideas how to fix a disk that is this severely screwed? -bash-3.2# diskutil listġ: Apple_Boot Recovery HD 650.0 MB disk1s1Ģ: Apple_HFS Mac OS X Base System 1. I’ve always used SanDisk Extreme Portable SSD prior to this and suddenly this morning the SSD doesn’t show up on my laptop. Connected it to the Mac, partitioned and formatted without issue. When I attempt to run fdisk to correct the MBR. 1 Just for the sake of having an answer here, this is what ended up fixing the problem: Connected the disk to a windows XP machine Deleted the existing FAT32 partition that the device shipped with using Disk Management under XP. Click the Format pop-up menu, then choose a file. If the Scheme pop-up menu isn’t available, make sure you selected the storage device you want to eraseit’s at the top of the hierarchy. Click the Scheme pop-up menu, then choose GUID Partition Map. diskutil eraseDisk free Empty /dev/diskX. In the sidebar, select the storage device you want to erase, then click the Erase button. As the name implies, this does a simple erase of the disk and marks the free space as 'empty' with no file system or partition scheme. I get an "error 6988 couldn't unmount disk". There are a few steps you can take, but all are destructive to the data on the device. I found I had to unmount the logical drive first, then I could delete the. Now in Disk Utility, sometimes I see the SSD drive and sometimes I boot and it's not there but I can never erase or partition it. disk Creating the partition map Error: -69877: Couldnt open device. I erased the SSD drive in my MacBook and was reinstalling Lion when it failed about 75% through the install. Step 1: Restart your Mac while pressing and holding the Option key, and then select to choose Recovery partition.
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