Re: raid0 initialization
At Tuesday, 15 June 2004, you wrote:
>On Tuesday 15 June 2004 07:53, Harland Christofferson wrote:
>> this is my fist time installing raid0 on a machine that is not a
>> new install. /dev/hda has gobs of good data i don't want to lose.
>> /dev/hdc is newly partitioned and formatted before installing the
>> raid tools.
*snip*
>
>> i created a new file /etc/raidtab
>>
>> raiddev /dev/md0
>> raid-level 1
>> nr-raid-disks 2
>> nr-spare-disks 0
>> persistent-superblock 1
>> device /dev/hda1
>> raid-disk 0
>> device /dev/hdc1
>> raid-disk 1
>>
>Above, you said you wanted to install raid0, but your config file
indicates
>raid1. Double check that your config file really says what you want.
typo ... raid1 is what i want.
>>
>> then, i tried
>> $# mkraid md0
>>
>> which responded
>> $# device md0 is not described in the config file
>>
>The error message is quite specific. You did not describe device
md0 in any
>config file. You did describe /dev/md0, however.
okay ... will try $# mkraid /dev/md0
>
>> i am reluctant to try
>> $# mkraid -f /dev/md0
>>
>> the force flag just seems scary to me.
>>
>> any suggestions?
>
>What is the partition type on /dev/hda1 and /dev/hdc1? If they
are not both
>FD (Linux raid autodetect), your raid array won't work.
the partition type? okay ... new territory for me. they are ext2
w/ ID of 83. they are the boot partitions.
>
>Note that, if you have data on /dev/hda1 that you want to keep,
you should
>mark that disk as a failed disk. Then, when you make your raid
array, data
>won't get erased from /dev/hda1. You can then mount the disk and
the raid
>and copy the data from one to the other. Once your data is on the
raid,
>mark the /dev/hda1 disk as a live disk, and the raid will re-sync,
and your
>data will be intact.
i am really glad this did not work the first time. i DO want to keep
the data intact on /dev/hda. should i mount each partition of /dev/hdc?
what i want to have occur is all partitions on /dev/hda be mirrored
on /dev/hdc.
>
>If the partition type is not causing your problem, let us know and
we'll try
>something else.
>
>Justin Guerin
>
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