* Re: BUG: fdisk fails silently if EBR is outside of disk
@ 2012-11-30 10:56 Karel Zak
2012-11-30 16:48 ` Phillip Susi
0 siblings, 1 reply; 3+ messages in thread
From: Karel Zak @ 2012-11-30 10:56 UTC (permalink / raw)
To: Phillip Susi; +Cc: util-linux
On Thu, Nov 29, 2012 at 03:37:47PM -0500, Phillip Susi wrote:
> While helping a user troubleshoot an issue, I noticed fdisk fails to
> produce any output when run on an MBR that contains an extended
> partition that starts beyond the end of the disk. The following is a
> sample of the user's MBR:
Fixed (I hope).
# ./fdisk /dev/loop0
You must set cylinders.
You can do this from the extra functions menu.
Failed to read extended partition table (offset=462748414)
Warning: ignoring extra data in partition table 5
Warning: ignoring extra data in partition table 5
Warning: ignoring extra data in partition table 5
Warning: invalid flag 0x1919 of partition table 5 will be corrected
by w(rite)
Welcome to fdisk (util-linux 2.22.269-6b3e3).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): p
Disk /dev/loop0: 0 MB, 512 bytes, 1 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0002a9f0
Device Boot Start End Blocks Id System
/dev/loop0p1 256 462748159 231373952 83 Linux
/dev/loop0p2 462748414 464843519 1047553 5 Extended
/dev/loop0p5 ? 883823639 1304898863 210537612+ 19 Unknown
Karel
--
Karel Zak <kzak@redhat.com>
http://karelzak.blogspot.com
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: BUG: fdisk fails silently if EBR is outside of disk
2012-11-30 10:56 BUG: fdisk fails silently if EBR is outside of disk Karel Zak
@ 2012-11-30 16:48 ` Phillip Susi
2012-11-30 20:34 ` Karel Zak
0 siblings, 1 reply; 3+ messages in thread
From: Phillip Susi @ 2012-11-30 16:48 UTC (permalink / raw)
To: Karel Zak; +Cc: util-linux
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On 11/30/2012 5:56 AM, Karel Zak wrote:
> Fixed (I hope).
>
> # ./fdisk /dev/loop0 You must set cylinders. You can do this from
> the extra functions menu. Failed to read extended partition table
> (offset=462748414) Warning: ignoring extra data in partition table
> 5 Warning: ignoring extra data in partition table 5 Warning:
> ignoring extra data in partition table 5 Warning: invalid flag
> 0x1919 of partition table 5 will be corrected by w(rite) Welcome to
> fdisk (util-linux 2.22.269-6b3e3).
>
> Changes will remain in memory only, until you decide to write
> them. Be careful before using the write command.
>
>
> Command (m for help): p
>
> Disk /dev/loop0: 0 MB, 512 bytes, 1 sectors Units = sectors of 1 *
> 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512
> bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk
> identifier: 0x0002a9f0
>
> Device Boot Start End Blocks Id System
> /dev/loop0p1 256 462748159 231373952 83 Linux
> /dev/loop0p2 462748414 464843519 1047553 5 Extended
> /dev/loop0p5 ? 883823639 1304898863 210537612+ 19 Unknown
If it could not read the EBR, where did it come up with the p5 entry?
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: BUG: fdisk fails silently if EBR is outside of disk
2012-11-30 16:48 ` Phillip Susi
@ 2012-11-30 20:34 ` Karel Zak
0 siblings, 0 replies; 3+ messages in thread
From: Karel Zak @ 2012-11-30 20:34 UTC (permalink / raw)
To: Phillip Susi; +Cc: util-linux
On Fri, Nov 30, 2012 at 11:48:04AM -0500, Phillip Susi wrote:
> > Device Boot Start End Blocks Id System
> > /dev/loop0p1 256 462748159 231373952 83 Linux
> > /dev/loop0p2 462748414 464843519 1047553 5 Extended
> > /dev/loop0p5 ? 883823639 1304898863 210537612+ 19 Unknown
>
> If it could not read the EBR, where did it come up with the p5 entry?
Sorry, I forgot to fix this nonsense. Fixed now.
Karel
--
Karel Zak <kzak@redhat.com>
http://karelzak.blogspot.com
^ permalink raw reply [flat|nested] 3+ messages in thread
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2012-11-30 10:56 BUG: fdisk fails silently if EBR is outside of disk Karel Zak
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