Re: Time Machine's volume uuid -- what does it match against?
Re: Time Machine's volume uuid -- what does it match against?
- Subject: Re: Time Machine's volume uuid -- what does it match against?
- From: "Jim O'Connor" <email@hidden>
- Date: Wed, 20 Jul 2016 11:15:54 -0800
- Comment: DKIM? See http://www.dkim.org
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Hi Michael,
Thanks for your response.
My higher level goal is to recognize partitions that TM will actively try to use on so I can avoid them. Media with TM data not related to this machine need different handling. I need to be sure I don’t interfere with TM in any way.
I don’t believe using the partition name alone will be sufficient.
Thanks,
Jim
On Jul 20, 2016, at 10:37 AM, Michael Watson <email@hidden> wrote:
> hi Jim,
>
> the ID emitted by the destinatininfo verb is not a volume UUID. it's a unique identifier used by Time Machine to track a collection of information about a specific backup destination. (we refer to it as the "destination ID".) the ID is used with other verbs like removedestination:
>
> sudo tmutil removedestination <destination_id>
>
> what's your higher-level goal? for most "i need to ignore TM stuff" situations, it's sufficient (and most-correct) to ignore the Backups.backupdb directory at the root of any volume. (for example, a disk with a TM backup store could be connected to a machine but not be one of that machine's backup disks.)
>
>
> --
> michael
> formerly time machine
>
>
> On 20 Jul, 2016, at 10:03, Jim O'Connor <email@hidden> wrote:
>
>> On El Cap (10.11.5) when I do
>>
>> tmutil destinationinfo -X
>>
>> I get a uuid which doesn’t match anything in
>>
>> diskutil info devnode
>>
>>
>> Where do I look to get the same UUID that Time Machine is using? I need to avoid the media that the OS is using for Time Machine.
>>
>>
>> <?xml version="1.0" encoding="UTF-8"?>
>> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd";>
>> <plist version="1.0">
>> <dict>
>> <key>Destinations</key>
>> <array>
>> <dict>
>> <key>Kind</key>
>> <string>Local</string>
>> <key>ID</key>
>> <string>EEDAB9D5-740E-4E11-BC39-52A4B6E58638</string>
>> <key>Name</key>
>> <string>TimeMachineHD</string>
>> <key>LastDestination</key>
>> <integer>1</integer>
>> <key>MountPoint</key>
>> <string>/Volumes/TimeMachineHD</string>
>> </dict>
>> </array>
>> </dict>
>> </plist>
>>
>>
>> Device Identifier: disk2s2
>> Device Node: /dev/disk2s2
>> Whole: No
>> Part of Whole: disk2
>> Device / Media Name: TimeMachineHD
>>
>> Volume Name: TimeMachineHD
>>
>> Mounted: Yes
>> Mount Point: /Volumes/TimeMachineHD
>>
>> File System Personality: Journaled HFS+
>> Type (Bundle): hfs
>> Name (User Visible): Mac OS Extended (Journaled)
>> Journal: Journal size 155648 KB at offset 0x3a38000
>> Owners: Enabled
>>
>> Partition Type: Apple_HFS
>> OS Can Be Installed: Yes
>> Media Type: Generic
>> Protocol: USB
>> SMART Status: Not Supported
>> Volume UUID: 5A69DD5E-D6B9-31B7-8CD6-FC377EBC5F18
>> Disk / Partition UUID: 620E6E7B-7C47-4930-B5F7-5C7E68C3B025
>>
>> Total Size: 2.0 TB (2000054960128 Bytes) (exactly 3906357344 512-Byte-Units)
>> Volume Free Space: 2.0 TB (1993384857600 Bytes) (exactly 3893329800 512-Byte-Units)
>> Device Block Size: 512 Bytes
>> Allocation Block Size: 4096 Bytes
>>
>> Read-Only Media: No
>> Read-Only Volume: No
>>
>> Device Location: External
>> Removable Media: No
>>
>>
>> Thanks for looking.
>>
>> Jim
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