On Thu, Feb 7, 2013 at 5:13 PM, Sam Martin <sambomar...@gmail.com> wrote:
> thanks shane. sorry, just one last thing.
>
> my mdadm.config doesn't contain reference to any devices. is this because
> it's stored on the raid members?
>
> thanks again,
> sam
>
>
> On 8 February 2013 00:10, Shane Johnson <s...@rasmussenequipment.com>wrote:
>
>>
>> On Thu, Feb 7, 2013 at 5:07 PM, Sam Martin <sambomar...@gmail.com> wrote:
>>
>>> brilliant, not rebuild though, you mean remount / assemble?
>>>
>>>
>>> On 7 February 2013 23:50, Shane Johnson <s...@rasmussenequipment.com>wrote:
>>>
>>>> On Thu, Feb 7, 2013 at 4:46 PM, Sam Martin <sambomar...@gmail.com>wrote:
>>>>
>>>>> do you know whether i could move a raid1 vol from 32bit dist to 64bit
>>>>> dist?
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On 7 February 2013 23:32, Shane Johnson
>>>>> <s...@rasmussenequipment.com>wrote:
>>>>>
>>>>>> On Thu, Feb 7, 2013 at 4:23 PM, Sam Martin <sambomar...@gmail.com>wrote:
>>>>>>
>>>>>>> could it be used without mdadm? i think the suggestion was that if
>>>>>>> it went wrong the disk could still be used as the "raid" stuff was on
>>>>>>> the
>>>>>>> end of the disk?
>>>>>>>
>>>>>>> that right?
>>>>>>>
>>>>>>>
>>>>>>> On 7 February 2013 22:33, Shane Johnson
>>>>>>> <s...@rasmussenequipment.com>wrote:
>>>>>>>
>>>>>>>>
>>>>>>>> On Thu, Feb 7, 2013 at 2:42 PM, Sam Martin
>>>>>>>> <sambomar...@gmail.com>wrote:
>>>>>>>>
>>>>>>>>> Hi Pascal,
>>>>>>>>>
>>>>>>>>> I'm not sure what top-posting is?
>>>>>>>>> I hope this isn't it!
>>>>>>>>>
>>>>>>>>> You mean test whether i can bring the raid vol up by booting into
>>>>>>>>> 64bit debian from usb?
>>>>>>>>>
>>>>>>>>> i did a mdadm -e on one of the disks in the array
>>>>>>>>>
>>>>>>>>> root@HTPC-NAS:~# mdadm -E /dev/sdc1
>>>>>>>>> /dev/sdc1:
>>>>>>>>> Magic : a92b4efc
>>>>>>>>> Version : 1.2
>>>>>>>>> Feature Map : 0x0
>>>>>>>>> Array UUID : 25a729b1:71f5193b:6abe8ba9:21e698f5
>>>>>>>>> Name : HTPC-NAS:0 (local to host HTPC-NAS)
>>>>>>>>> Creation Time : Thu Dec 20 12:25:56 2012
>>>>>>>>> Raid Level : raid1
>>>>>>>>> Raid Devices : 2
>>>>>>>>>
>>>>>>>>> Avail Dev Size : 5860268032 (2794.39 GiB 3000.46 GB)
>>>>>>>>> Array Size : 2930133824 (2794.39 GiB 3000.46 GB)
>>>>>>>>> Used Dev Size : 5860267648 (2794.39 GiB 3000.46 GB)
>>>>>>>>> Data Offset : 262144 sectors
>>>>>>>>> Super Offset : 8 sectors
>>>>>>>>> State : clean
>>>>>>>>> Device UUID : fe1998ea:8535a654:31083985:d8c560c1
>>>>>>>>>
>>>>>>>>> Update Time : Thu Feb 7 09:01:38 2013
>>>>>>>>> Checksum : ad4320a8 - correct
>>>>>>>>> Events : 51
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Device Role : Active device 1
>>>>>>>>> Array State : AA ('A' == active, '.' == missing)
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> I think the 1.2 means it's a no go in terms of running the disk
>>>>>>>>> independently of the raid vol.
>>>>>>>>>
>>>>>>>>> Thanks
>>>>>>>>> Sam
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Sunday, January 27, 2013 11:10:01 PM UTC, Pascal Hambourg wrote:
>>>>>>>>> > Sam Martin a ï¿œcrit :
>>>>>>>>> >
>>>>>>>>> > > Thanks for reply Pascal.
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > Please don't top-post.
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > > How would I know?
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > mdadm -E /dev/<raid_member> (e.g. /dev/sdc1)
>>>>>>>>> >
>>>>>>>>> > mdadm -D /dev/<raid_device> (e.g. /dev/md0)
>>>>>>>>> >
>>>>>>>>> > cat /proc/mdstat
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > > I've just posted a question to original response, do you
>>>>>>>>> happen to know the answer?
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > There are two questions.
>>>>>>>>> >
>>>>>>>>> > I already replied to the first one. I don't know about the
>>>>>>>>> second one,
>>>>>>>>> >
>>>>>>>>> > but I see no reason why the RAID array would not work with a
>>>>>>>>> 64-bit
>>>>>>>>> >
>>>>>>>>> > system. If unsure just try it with a 64-bit live system.
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > --
>>>>>>>>> >
>>>>>>>>> > To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org
>>>>>>>>> >
>>>>>>>>> > with a subject of "unsubscribe". Trouble? Contact
>>>>>>>>> listmas...@lists.debian.org
>>>>>>>>> >
>>>>>>>>> > Archive: http://lists.debian.org/5105af36.60...@plouf.fr.eu.org
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org
>>>>>>>>> with a subject of "unsubscribe". Trouble? Contact
>>>>>>>>> listmas...@lists.debian.org
>>>>>>>>> Archive:
>>>>>>>>> http://lists.debian.org/9bfc076c-457e-45e3-8719-35bc86a0f...@googlegroups.com
>>>>>>>>>
>>>>>>>>> Your output from mdadm -e on that disk show that it is raid level
>>>>>>>> one which is a mirror so you can run with one disk failed, but there
>>>>>>>> is no
>>>>>>>> redundancy anymore.
>>>>>>>>
>>>>>>>> --
>>>>>>>> Shane D. Johnson
>>>>>>>> IT Administrator
>>>>>>>> Rasmussen Equipment
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> Sorry, I don't think so. From my understanding, it is still a
>>>>>> member of the raid and would need the mdadm in order to present the
>>>>>> volume
>>>>>> to the os to see the partition info, Although, I don't know about
>>>>>> pulling
>>>>>> data of with some sort of disk forensics.
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Shane D. Johnson
>>>>>> IT Administrator
>>>>>> Rasmussen Equipment
>>>>>>
>>>>>>
>>>>>>
>>>>> Please use reply all to keep on the list for future reference and the
>>>> enlightenment of as many people as possible.
>>>>
>>>> Yes, mdadm will rebuild it as long as it supports the version that
>>>> created the volume.
>>>>
>>>> --
>>>> Shane D. Johnson
>>>> IT Administrator
>>>> Rasmussen Equipment
>>>>
>>>>
>>>>
>>>
>> Yes - reassamble is correct. thanks for the correction.
>>
>>
>> --
>> Shane D. Johnson
>> IT Administrator
>> Rasmussen Equipment
>>
>>
>>
>
>From my experience you have to manually put it in there. Going from
memory, I believe that *mdadm -E --scan > /etc/mdadm/mdadm.conf *should do
the trick. I would do it without the redirect first to make sure you just
get the information in the right format. If it's not correct a
quick Google search should locate the correct command to get it in there.
I read a lot of recommendations that you just add it by hand but the above
method worked for me.
Shane
--
Shane D. Johnson
IT Administrator
Rasmussen Equipment
