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Amfabeta
Tux's lil' helper
Joined: 12 Aug 2005
Posts: 133
Location: Finland
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 Posted: Tue Jul 25, 2006 8:12 am Post subject: question about fdisk |
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My previous partition table had 56227+ blocks (cylinders 1604-1610) on /dev/hda2. Now I'd like to make same size partition again but in /dev/hda1. so I try to use cylinders 1-6 but block size (2992+) doesn't match. How does these cylinders work? I thought that same amount of cylinders has same size blocks.
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Sedrik
l33t
Joined: 08 Apr 2005
Posts: 655
Location: Uppsala, Sweden
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| Posted: Tue Jul 25, 2006 9:32 am Post subject: |
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I believe it depends on filesystem actually.
I'm no expert but I believe different filesystems have different sizes on thier block (thats why some run better with larger files but slower with smaller ones)
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intmain
Apprentice
Joined: 14 Dec 2005
Posts: 179
Location: Austria
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| Posted: Tue Jul 25, 2006 10:12 am Post subject: |
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The number of blocks per cylinder depends on the harddisk, you can find out about the size of the cylinders with fdisk -l.
For instance, for my two harddisks it shows:
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fdisk -l /dev/hda
Disk /dev/hda: 41.1 GB, 41174138880 bytes
16 heads, 63 sectors/track, 79780 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
...
fdisk -l /dev/hdb
Disk /dev/hdb: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
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So, for instance if I have a partition of 6 cylinders on hdb (6*1665=96390), to get a partition of the approximately same size I would have to take 95 or 96 cylinders (96390/1008=95.625). |
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