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тАО02-03-2005 07:54 PM
тАО02-03-2005 07:54 PM
Disklabelling a previously "used on linux" disk
Tru64 will not let me erase the disklabel. The problem appears due to Linux having partitioned this disk (a to c) with none of the partitions starting at block zero... (type=resrvd8)
Any attempt at disklabel -rw or -z results in either "a partition is not block 0 of the disk" or "Open Partition would move or shrink...".
This looks to be a gotcha, Tru64 needs one partition to be at block zero for disklabel to work yet in this case cannot touch/edit the label because no partition starts at block zero.
Is there any way I can force Tru64 (tried v4 and v5) to ignore the partitions that are already there and relabel this disk. I've tried -e -z -wr and trying to add a new partition all get one of the error messages...
My guess is I'll have to take the disk to either an RA8000 or Linux Machine and erase the labels but thats a bit much - there must be some "sneaky" way of getting round this problem...
Cheers
Gary
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тАО02-03-2005 09:51 PM
тАО02-03-2005 09:51 PM
Re: Disklabelling a previously "used on linux" disk
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тАО02-03-2005 10:26 PM
тАО02-03-2005 10:26 PM
Re: Disklabelling a previously "used on linux" disk
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тАО02-03-2005 10:43 PM
тАО02-03-2005 10:43 PM
Re: Disklabelling a previously "used on linux" disk
No partitions are pointed at block zero, therefore how can I get at block zero to erase the labels... !!
This is where I went wubble... and thought i'd ask the group !!
Cheers
Gary
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тАО02-04-2005 01:24 AM
тАО02-04-2005 01:24 AM
Re: Disklabelling a previously "used on linux" disk
You can write over the disks boot/label area with the help of the console..
At the >>> prompt:
>>> chmod +w DKA* or DKB* or DKxnnn
>>> exer -a w DKxnnn &
>>> show_status
when it shows aro 8MB written, then init the system (or fg the exer and ctrlC)
__ Johan
_JB_
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тАО02-04-2005 01:38 AM
тАО02-04-2005 01:38 AM
Re: Disklabelling a previously "used on linux" disk
Another way is with scu
/sbin/scu
scu> sbtl 4 3 0 <--- (disk on bus#4 target#3 )
scu> format
Also dd on the RAW special device should work
dd if=/dev/null of=/dev/rrzNNc bs=512 count=32
Replace /dev/rrzNNc by /dev/rdisk/dskNNc if on V5.1
___ Johan.
_JB_
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тАО02-04-2005 09:07 AM
тАО02-04-2005 09:07 AM
Re: Disklabelling a previously "used on linux" disk
aren't the first 16 blocks read only?
Michael
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тАО02-06-2005 07:40 PM
тАО02-06-2005 07:40 PM
Re: Disklabelling a previously "used on linux" disk
The SCU format command didn't work - message about file systems. The excer from SRM also failed with an error full of zeros...
Upshot was - Download the RedHat 7.2 ISO CD No1 image, Burn a cd-rom and then boot it. Run disk-druid / fdisk and erase the labels...
Thanks for the suggestions... was worth a try...
Cheers
Gary
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тАО02-09-2005 10:16 PM
тАО02-09-2005 10:16 PM
Re: Disklabelling a previously "used on linux" disk
Hi;
/usr/lbin/zeero may help you.
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тАО05-14-2012 04:55 PM
тАО05-14-2012 04:55 PM