Fixing an "Unable to write to the last block of the device" Error in OS X®
If an attempt to Erase or Partition an SSD in macOS® returns the error of "Unable to write to the last block of the device," a few different issues could be causing the error. Try the steps below to fix this error, or to confirm if advanced support is needed.
1. Change cables and ports
A communication error or some fault in the connection can cause the error. Changing ports and cables addresses this issue. Use an alternate USB port if your SSD is connected externally and change your USB cable or enclosure if applicable. Try the device inside the system if an appropriate internal connection is available. Also, moving the drive to another system entirely, if you have another one available, might help narrow down the problem.
2. Use Disk Utility in macOS Recovery
If you are receiving the error while you are booted to OS X, using the Erase process in the Recovery Utilities might help. Boot to macOS Recovery (either by holding Option or Command+R during your system's startup, depending on which your system requires) and attempt the Erase procedure there to rule out other software as a potential source of conflicts.
3. Use alternate software or another operating system
Un’utilità del disco o una variabile OS X può essere in errore per il problema. Per determinarlo, prova differenti software di partizionamento o formattazione, inclusi ma non limitati a Windows® Disk Management, potrebbe essere una soluzione. Se formatti l’unità in tale ambiente e finisci per usare un file di sistema non adatto ai tuoi bisogni (come Windows NTFS quando il tuo SSD deve essere macOS Extended Journaled), puoi solitamente spostare l’unità di nuovo nel sistema Mac® e cancellarla di nuovo. A questo punto, l’operazione dovrebbe essere completata una volta che l’unità ha accettato una formattazione altrove. Se la soluzione qui sopra non ha efficacia, contattaci per ulteriore supporto.
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