Why you may see a new “data” disk in Catalina

Why you may see a new “data” drive in the Catalina

Apple took-system protection to the next level in macOS 10.15 Catalina by splitting your normal startup volume in two pieces. It appears as a single volume on the Desktop, but it is actually two: one is labeled with the name of the volume, while the other “data” will be displayed.

The new main-volume is write-protected and contains only the files of the operating system. This doubles down on the previously added System Integrity Protection (SIP) function, which prevents important files are modified, as a way, the potential for malware exploitation reduced. This new approach in Catalina is a heavier version of this.

The volume of data it contains everything, and is marked with the disk utility with a house Symbol on its disk icon in the descriptive view. Through the use of new APFS functions in Catalina, Apple is a “volume group”, to the left of the system-and data-volumes together as a single Element function, and use “firmlinks”, which will allow cross-volume symlinks, without duplicate files, the more binding of the two logically different elements together. Bombich software Software, the developer of Carbon Copy Cloner, has a detailed explanation on your blog. (And note that if you separated mount-a Catalina drive in Mojave, both drives correctly, but appear and repealed.)

mac911 new catalina volume group IDG

Catalina Start “volume” is really a group of two separate APFS volumes.

During the upgrade from a previous macOS Catalina, Apple all the files moves in a path that can no longer be written by the user, the Home directory of the shared folder in “Misplaced.”

If you set up a start-up Catalina, they would not be two volumes to see on the desktop—only a, and it is as expected, with the simple name of your volume, how to do it. Apple creates it, that is the trick with the hide of the “data” volume, although it is mounted, and with firmlinks to ensure that all of the files in the Home directory and other read /write areas of the macOS assigned to the right place.

This is just confusing, when things go wrong. I’ve heard from several readers and reading in some forums that the amount of data that sometimes appears on the Desktop as a readily accessible volume. A reader has even found that Time Machine refused to run, after you had updated to Catalina, because it’s two copies of the “iMac – data” volume found, possibly because the reader had to be mounted to a backup.

I don’t yet have an explanation of why this happens, though it may have to do with the major updates for disk-cloning software to work correctly with the volume groups, firmlinks, and Catalina. If you duplicate or copy and paste your Catalina startup disk with a tool is still not ready for Catalina or the boot Mojave, it is likely to create two separate volumes instead of a single Catalina as a whole. (Carbon Copy Cloner is ready for Catalina; Shirt Pocket’s SuperDuper! update is in its final beta-Test Phase.)

[ read More: Learn more about macOS Catalina ]

Time Machine is a backup of a Catalina can Start the volume group to an HFS+ drive, though, you should try only the interaction with such a backup within the Catalina—in the Mojave, time machine, don’t know exactly how to deal with it.

This Mac 911 article, the answer to a question that was submitted from Macworld reader’s Bill.

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Released on Wed, 06 Nov 2019 13:00:00 +0000

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