Bug 8812

Summary:	66305-cylinder disk shows up as 769-cylinder in fdisk.
Product:	[Retired] Red Hat Linux	Reporter:	xkr47
Component:	util-linux	Assignee:	Elliot Lee <sopwith>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	low	Docs Contact:
Priority:	medium
Version:	6.1	CC:	johnsonm
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2001-07-18 09:47:59 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description xkr47 2000-01-24 23:05:53 UTC

My new IBM 34gb harddisk is identified correctly at boot time as 66305
cylinder (16 heads, 63 sectors). However, when I start up fdisk it shows me
769 cylinders, which is equal to the lowest 16 bits of 66305. "sfdisk -g"
also shows the disk as 769-cylinder. However, cfdisk correctly displays the
number of cylinders (after creating a empty partition table with fdisk).

I guess if I had used some other DOS or Windows based utility (urgh) then
that util might have wrapped the whole disk into (4160,255,63) or whatever
and this problem wouldn't have occured since I've noticed that linux
detects the actual used parameters (if it can) from the partition table.

Comment 1 Elliot Lee 2001-07-16 23:49:27 UTC

Michael, is this a kernel bug as Matt suggested?

Comment 2 Arjan van de Ven 2001-07-18 09:47:55 UTC

Red Hat Linux 6.1 had an fdisk that couldn't cope with such large disks.
I'd recommend upgrading the fdisk to at least the 7.0 version.