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On 08/06/2016 02:21 AM, Andrea Conti wrote: |
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> Hi, |
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> |
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>> ~ # parted /dev/sde print |
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>> Model: WD My Book 1230 (scsi) |
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>> Disk /dev/sde: 6001GB |
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>> Sector size (logical/physical): 4096B/4096B |
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> |
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> [...] |
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> |
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>> AFAICS this partition works fine, fsck does not report any problem. The |
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>> funny thing is, it should not have been possible, because of the 2GB limit |
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>> of MBR. |
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> |
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> The real limit of MBR is 2^32 sectors, which amounts to 2TB when using |
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> 512B sectors. Both your disks are using native 4kB sectors (look at the |
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> logical sector size in the parted output), which effectively raises the |
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> MBR limit to 16TB. |
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> |
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> Not that this answers your question, as the Linux kernel has supported |
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> 4kB sectors for years and AFAIK it does not need any special |
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> configuration options to do so... |
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> |
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> andrea |
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It's always a good idea to check alignment on the newer disks. Here's a |
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doc [1]; but it's not always clear how to ensure proper alignment. |
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Supposidly the newer tools do this automation, but it's not 100%; ymmv. |
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[1] |
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https://www.ibm.com/developerworks/linux/library/l-linux-on-4kb-sector-disks/ |
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Many disk are hybrids of the 512/4906 sector size. |
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hth, |
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James |
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