From: Ulf Zibis <Ulf.Zibis@gmx.de>
To: util-linux@vger.kernel.org
Subject: question on sfdisk geometry estimation
Date: Tue, 27 Nov 2012 11:14:20 +0100 [thread overview]
Message-ID: <50B4927C.9010200@gmx.de> (raw)
Hi,
using sfdisk -l I had this output:
Disk /dev/sda: 19457 cylinders, 255 heads, 63 sectors/track
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0
Device Boot Start End #cyls #blocks Id System
/dev/sda1 * 0+ 3038 3039- 24410736 7 HPFS/NTFS/exFAT
/dev/sda2 18936+ 19456- 521- 4180680 12 Compaq diagnostics
/dev/sda3 3039 5390 2352 18892440 83 Linux
/dev/sda4 5391 18935 13545 108800212+ 5 Extended
/dev/sda5 9725+ 12764 3040- 24418768+ 7 HPFS/NTFS/exFAT
/dev/sda6 12765+ 18935 6171- 49568526 7 HPFS/NTFS/exFAT
Disk /dev/sdb: 10337 cylinders, 240 heads, 63 sectors/track
Units = cylinders of 7741440 bytes, blocks of 1024 bytes, counting from 0
Device Boot Start End #cyls #blocks Id System
/dev/sdb1 * 0+ 4604- 4605- 34812823+ 7 HPFS/NTFS/exFAT
/dev/sdb2 9782 10336 555 4195800 12 Compaq diagnostics
/dev/sdb3 5952 9781 3830 28954800 f W95 Ext'd (LBA)
/dev/sdb4 4604+ 5951- 1348- 10183680 7 HPFS/NTFS/exFAT
/dev/sdb5 5952+ 9781 3830- 28954768+ b W95 FAT32
So I'm wondering why sfdisk assumed sdb to be 240 head-aligned instead of 255.
All partitions except the sdb2 match with the 255*63 alignment.
Any hint, how the geometry should be estimated correctly?
Many thanks to your answer,
-Ulf
next reply other threads:[~2012-11-27 10:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-27 10:14 Ulf Zibis [this message]
2012-11-27 14:43 ` question on sfdisk geometry estimation Ulf Zibis
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