gpart: table 'da0' is corrupt; operation not permitted
Hello again, Not happy to be posting so much lately especially being so new. I grabbed a few disks from a Mac and am using them for sys disks. Upon booting from an install CD into a shell, I type; gpart show and see several partitions; 34 78165293da0 GPT (37G) [CORRUPT] 34 6 - free - (3.0k) 40 409600 1 efi (200M) 409640 774935362 !52414944--11aa-aa11-00306543eacac (37G) 77903176262144 3 apple-boot (128M) 781653207 - free- (3.5k) Upon doing; gpart destroy da0 I get; gpart: Device busy Upon doing; gpart delete -i 1 da0 I get; gpart: table da0 is corrupt: Operation not permitted Any insight would be huge, thanks in advance, - aurf ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: gpart: table 'da0' is corrupt; operation not permitted
On Tue, Jul 16, 2013 at 1:44 PM, aurfalien aurfal...@gmail.com wrote:
Upon doing;
gpart destroy da0
I get;
gpart: Device busy
crude but effective:
DISK=da0
offset=`diskinfo $DISK | awk '{ print $4 - 131072 }'`
dd if=/dev/zero of=/dev/$DISK bs=64k count=1
dd if=/dev/zero of=/dev/$DISK bs=64k seek=$offset
gpart create -s gpt ${DISK}
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Re: gpart: table 'da0' is corrupt; operation not permitted
On Jul 16, 2013, at 1:50 PM, Michael Sierchio wrote:
On Tue, Jul 16, 2013 at 1:44 PM, aurfalien aurfal...@gmail.com wrote:
Upon doing;
gpart destroy da0
I get;
gpart: Device busy
crude but effective:
DISK=da0
offset=`diskinfo $DISK | awk '{ print $4 - 131072 }'`
dd if=/dev/zero of=/dev/$DISK bs=64k count=1
dd if=/dev/zero of=/dev/$DISK bs=64k seek=$offset
gpart create -s gpt ${DISK}
This is what I ended up doing.
I unplugged it, waited a few, re plugged and then I was able to delete/destroy.
I will keep your method on hand though as I prefer not doing a hot plug.
- aurf
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Re: gpart: table 'da0' is corrupt; operation not permitted
On Tue, 16 Jul 2013, aurfalien wrote:
On Jul 16, 2013, at 1:50 PM, Michael Sierchio wrote:
On Tue, Jul 16, 2013 at 1:44 PM, aurfalien aurfal...@gmail.com wrote:
Upon doing;
gpart destroy da0
I get;
gpart: Device busy
crude but effective:
DISK=da0
offset=`diskinfo $DISK | awk '{ print $4 - 131072 }'`
dd if=/dev/zero of=/dev/$DISK bs=64k count=1
dd if=/dev/zero of=/dev/$DISK bs=64k seek=$offset
gpart create -s gpt ${DISK}
This is what I ended up doing.
I unplugged it, waited a few, re plugged and then I was able to delete/destroy.
I will keep your method on hand though as I prefer not doing a hot plug.
Hot plug? That just wipes the beginning and end of the disk. I would
erase 1M just to be sure.
The more elegant version is
gpart destroy -F da0
If it gives an error when doing that, disabling the safety may be
necessary: sysctl kern.geom.debugflags=16
Do that only when necessary. It usually is not.
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Re: gpart: table 'da0' is corrupt; operation not permitted
On Jul 16, 2013, at 3:01 PM, Warren Block wrote:
On Tue, 16 Jul 2013, aurfalien wrote:
On Jul 16, 2013, at 1:50 PM, Michael Sierchio wrote:
On Tue, Jul 16, 2013 at 1:44 PM, aurfalien aurfal...@gmail.com wrote:
Upon doing;
gpart destroy da0
I get;
gpart: Device busy
crude but effective:
DISK=da0
offset=`diskinfo $DISK | awk '{ print $4 - 131072 }'`
dd if=/dev/zero of=/dev/$DISK bs=64k count=1
dd if=/dev/zero of=/dev/$DISK bs=64k seek=$offset
gpart create -s gpt ${DISK}
This is what I ended up doing.
I unplugged it, waited a few, re plugged and then I was able to
delete/destroy.
I will keep your method on hand though as I prefer not doing a hot plug.
Hot plug? That just wipes the beginning and end of the disk. I would erase
1M just to be sure.
The more elegant version is
gpart destroy -F da0
Oh for sure, I did that after the hotplug which finally allowed me to f do it.
I had to hot plug a few times though.
If it gives an error when doing that, disabling the safety may be necessary:
sysctl kern.geom.debugflags=16
Do that only when necessary. It usually is not.
Funny, I did that based on some googling but no dice.
I booted in both regular shel and Live CD.
- aurf
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