#APPLE TARGET DISK MODE MAC#
Steps are as follows: a) Connect your affected Mac and the working Mac using a Thunderbolt or FireWire cable. When your Mac doesn’t boot, you can use target disk mode and another working Mac to access the affected fusion drive. Wiping this key should provide protection for the entire disk, because without it the volume data cannot be decrypted. Use Target Disk Mode to Access Fusion Drive. This is to wipe the device key that is used in the wrapping process, stored in special NOR memory (the NVMe is NAND). The Apple proprietary LUN2 - AppleEffaceableStorage endpoint.This is for accessing a T2’s AppleKeyStore service to unwrap FileVault2 keys with a password. The Apple proprietary LUN1 - AppleKeyStore endpoint.The Apple proprietary LUN0 - CONTROL endpoint, for managing power, device information, read/write protect and a few other things.SCSI sits on top of the BOT layer and provides basic commands, Apple extensions and LUN addressing. A device in UTDM has 4 addresses or in SCSI language LUNs (logical unit numbers). This is a simpler protocol to implement as it doesn’t permit more eccentric things like native command queueing.
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It should be noted that this is not UASP or USB attached SCSI protocol, but instead SCSI over the mass-storage BOT. Beyond this everything appears to be a superset of the standard SCSI command set. These pipes end up translating into LUNs at the next level up the stack. Think of this level as TCP with a set number of pipes. This provides basic framing/length, checksum, direction, logical targets, etc. This provides two `1024` byte bulk endpoints that communicate with the device in what is called USB MSD BOT (USB mass-storage device, bulk only transport ). When an Apple laptop is booted into TDM and a USB 3.0 cable is attached (it should be noted that the USB-C cable needs all USB3.0 pins connected, UTDM does not work with 1.0, 1.1 or 2.0 cables or controllers), it declares itself to be a Apple, PID_1800, implementing a Diagnostic Class ( 0xDC) device with subclass 0x02 and protocol 0x01. The first layer of the TDM onion is a simple obfuscation. This paper will be extended in the future to cover the slight differences when using Thunderbolt to replace USB mass-storage as an underlying transport. What follows is an analysis of the USB based target disk mode protocol, and also a revelation that the FileVault2 key may be extractable (albeit in wrapped form) from a machine without the OS booted. Target Disk mode can be used with Thunderbolt 3 (USB-C), Thunderbolt 2, or FireWire cables.
![apple target disk mode apple target disk mode](https://i.ytimg.com/vi/Q0Nj8o5oylo/mqdefault.jpg)
Moreover, Apple’s security features such as encryption and effaceable storage complicate the implementation. If, for some reason, you can’t connect them wirelessly, you can connect them using a cable and use Target Disk mode. Modern USB and Thunderbolt based target disk mode requires a machine that is ordinarily a USB host to become a slave. Because of the peer-to-peer nature of FireWire and the standard SCSI command set, implementing a consumer in linux for this protocol was relatively straight forward. Target Disk Mode is a great feature that makes moving files between computers quick and easy.In earlier generations of Apple MacBook computers, TDM or Target Disk Mode was a boot mode that made all internal drives appear to an external FireWire capable system to be LUNs which could be consumed by another endpoint (This usually included the internal Hard Drive and CD/DVD-ROMs). With your Target Disk Mode Mac connected via firewire to another Mac, your Target Disk Mode Mac Hard Drive should appear on your desktop and be ready for read and write access.The computer should show on the screen the Firewire logo and power level and you should be able to connect it to your other Mac.
![apple target disk mode apple target disk mode](https://www.techhub.in.th/wp-content/uploads/2018/01/file-sharing-with-Target-disk-mode-for-apple-mac.jpg)
When the computer starts and you hear the Chime, press and hold the T key on the computer you want to enter Target Disk Mode.Shutdown all your applications and restart your Mac.To turn your Mac into a Firewire Mass Storage Device: Generally speaking, Target Disk Mode is a great thing on the Mac, but it does leave your files a bit less protected than when you access them through OS X on the native computer itself. Target Disk Mode is essential for performing tasks like moving a significant number of files from one computer to another or simply accessing files from one computer (a Macbook Pro) on another computer (a MacPro) when working on large projects that move from mobile to desktop computing. One of these features is “Target Disk Mode” and it essentially turns your Mac into a Firewire Mass Storage Drive that can be accessed quickly and easily by connecting it with your firewire cable to another Mac. With the design and configuration of OS X, many of these hidden features can come in handy at the most critical times. Its no secret that while Apple packs their OS X operating system with thousands of user-friendly features, the operating system is still built on top of a bit more complicated UNIX platform.