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Heiko Wundram schrieb: |
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> You cannot manage disks >= ~2TB with fdisk (i.e., DOS partition tables), as |
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> they (or rather the on-disk-structure of DOS partition tables) have an |
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> inherent limitation in the maximum number of LBA48-blocks they can address. |
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> |
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> I'd presume that because of this inherent limitation, fdisk is reporting the |
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> wrong total size (2TB+774G+epsilon ~ 3TB; sounds like somewhere someone is |
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> doing a modulo operation, possibly), and completely "off" values for |
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> heads/sectors. |
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> |
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> Anyway, md-devices cannot be partitioned anyway (of course you can write a |
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> partition table on them, but the kernel won't use that to create md2-1,-2, |
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> etc.), so using fdisk is wrong. |
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> |
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> If you want to check the "real" size of the device, don't use fdisk, but |
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> rather use |
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> |
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> blockdev --getsize64 /dev/md2 |
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> |
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> which shows you the byte-count of the corresponding volume, and which I think |
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> will be 3TB, as you want it to be. |
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Nope, it did show the same 774 GB. |
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> If you want to subpartition large devices, use lvm(2), which does not have the |
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> 2TB limitation on size. |
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> |
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> Hope this helps! |
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|
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Thanks for your explanations and suggestions ... but ... |
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I just now received a reply to my posting on the german list, the |
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mistake was that CONFIG_LBD was not set in my kernel. |
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Now I get: |
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|
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# blockdev --getsize64 /dev/md2 |
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2973068230656 |
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|
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# fdisk -l |
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Platte /dev/md2: 2973.0 GByte, 2973068230656 Byte |
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Thanks anyway! |
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Stefan |
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