Расширенный раздел не запускается на границе физического сектора на жестком диске 512e (эмулируемый 4k)

2131
Nazar554

Мой fdisk -lвывод говорит мне, что мой расширенный раздел ( sda4) смещен. Но перегородки внутри него выровнены (их начальный сектор делится на 8). Повлияет ли смещение расширенного раздела на производительность?

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0xb82c3054  Device Boot Start End Blocks Id System /dev/sda1 * 2048 206847 102400 7 HPFS/NTFS/exFAT /dev/sda2 206848 419635199 209714176 7 HPFS/NTFS/exFAT /dev/sda3 419637248 1806721023 693541888 7 HPFS/NTFS/exFAT /dev/sda4 1806723070 1953523711 73400321 5 Extended Partition 4 does not start on physical sector boundary. /dev/sda5 1806723072 1814720511 3998720 82 Linux swap / Solaris /dev/sda6 1814722560 1854719999 19998720 83 Linux /dev/sda7 1854722048 1953523711 49400832 83 Linux
2

1 ответ на вопрос

3
Rod Smith

No; that warning is a bug. It's actually impossible to properly-align an extended partition on a modern disk, because the data structure it contains is only one sector in size. Thus, no matter where it's placed, writing that data structure will write just one sector, resulting in the sort of inefficient write operation that's the reason for aligning partitions in certain ways. Fortunately, this doesn't really matter, since writes to the extended partition (as distinct from the logical partitions it contains) are extremely rare. Furthermore, we're talking about just one sector, so even when you do write it, the speed reduction is not likely to be noticeable.

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