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dman777
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Joined: 10 Jan 2007
Posts: 1004
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 Posted: Sat Apr 11, 2015 6:17 pm Post subject: fdisk - defaults to non Dos but yet uses Dos disklabel |
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My version of fdisk man page states default is DOS mode is disabled.... but why is it stating 'Created a new DOS disklabel'?
localhost four # fdisk /dev/sdc
Welcome to fdisk (util-linux 2.24.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table.
Created a new DOS disklabel with disk identifier 0x780f1aa7.
Command (m for help): |
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s4e8
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Joined: 29 Jul 2006
Posts: 311
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| Posted: Sun Apr 12, 2015 2:06 am Post subject: |
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| "dos" mode means partitions aligned to cylindar boundary. non-dos mode partitions aligned to physical sector size. It's no relative to MBR or GPT format. |
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NeddySeagoon
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Joined: 05 Jul 2003
Posts: 54244
Location: 56N 3W
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| Posted: Sun Apr 12, 2015 12:42 pm Post subject: |
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s4e8
Its not that simple. With a GPT disklabel you get
| Code: | Disklabel type: gpt
Disk identifier: 518AEFA3-E36E-40F3-8AB9-D55B7CF072AD |
and the protective MSDS disklabel is
| Code: | Disklabel type: dos
Disk identifier: 0x00000000 |
| fdisk: | | Created a new DOS disklabel with disk identifier 0x780f1aa7. |
Looks like a real MSDOS disk lable.
There are big differesces on disk betwen GPT and MSDOS disklables too.
Run or so it really knows what you want.
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Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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s4e8
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Joined: 29 Jul 2006
Posts: 311
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| Posted: Sun Apr 12, 2015 2:20 pm Post subject: |
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| NeddySeagoon wrote: | s4e8
There are big differesces on disk betwen GPT and MSDOS disklables too.
Run or so it really knows what you want. |
That's true, GPT is not dos disklabel, but fdisk never defaut to GPT (even with disk >2T, it default DOS disklabel instead GPT), it default to non-DOS aligned mode only. If you need GPT, you must change it explicitly. |
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