seagate mac unable to unmount volume for repair

Seagate Unable To Unmount Volume For Repair Install OS X
Seagate Unable To Unmount Volume For Repair How To Retrieve Them

Seagate Unable To Unmount Volume For Repair Install OS X

As a side note, if you erase the disk and reinstall OS X or macOS, it should automatically create a partition for Recovery and install it.

Carmela writes in with a question after wiping a 2010 MacBook Pro and reinstalling macOS.

I wanted to restore it to factory settings, but while erasing the disk I erased not only Macintosh HD but the Hitachi What have I done I reinstalled the OS fine.

This highlights how well Apple typically hides some of the fussy details of an operating system from users, usually to the good: most of the time, we dont need to know any low-level details in order to use a Mac.

What Carmela is seeing is the difference between a drive and a partition.

While this may be old hat for veteran users, its just jargon for those who have never had to format a drive before.

A drive is a physical thing, whether its a hard disk drive (HDD) or solid-state drive (SSD).

Seagate Unable To Unmount Volume For Repair How To Retrieve Them

Its a physical medium that has a disk controller that mediates access to data stored on the disk, including carrying out and tracking the details of what bits are written where, and how to retrieve them later.

The Hitachi part Carmela encountered is the manufacturers name for the physical drive as assigned at the factory.

In my 2014 Mac mini, I have a drive labeled APPLE HDD HTS541010A9E662 Media.

When I search for the product number, I come up with Hitachi 1TB SATA 2.5 Hard Drive, the manufacturers name for the drive.

Depending on the vintage of Mac you have and other factors, the drives name might start with Apple or might start with the hard-drive makers company name.

Only a handful of firms make hard drives.).

However, the physical disk is useless without being formatted or prepared to store the data in a particular way that an operating system can read.

Apple supports multiple styles of formatting, though its preferred one for Macs is called GUID Partition Table.

GUID refers to a globally unique identifying code thats part of the formatting standard.).

When you format a disk, you partition it into one or more logical volumes.

The term logical here means that its defined in software, and is independent of the drive hardware.

A very low-level part of the OS knows how to talk to drive hardware; a higher-level part knows how to read and write using various formats, and can access the partition to read and write data.

The higher-level part doesnt need to know anything about hardware to access the logical partition.

This is called abstraction, and its found across every part of digital technology.).

Each partition has a name distinct from the hard drives manufacturing name that typically appears as the volume name when mounted in the Finder.

Macintosh HD is the name Apple uses for the startup volume if you dont change it.

Its not bad to erase the drive, especially if youre going back to a default, fresh installation because it eliminates the possibility that anything could be wrong with the partition.

Without a partition, an OS cant do anything with a drive at all, because it has no place to read or write data.

Nearly all Macs since Lion was released have just two partitions: a large one that is used by OS X or macOS, and a small one that holds the Recovery disk, a mini-system that Apple created to repair, examine, or have a secure login for your main partitions OS without needing to create some kind of bootable external disk.

More advanced users might split a very large drive into multiple parts to run different systems on each or to have a Boot Camp partition to run Windows under macOS.

Seagate Mac Unable To Unmount Volume For Repair