Rob Wultsch wrote:
> Under woody it is not simplistic (not to say it is difficult). Anyone
> want to comment about sarge?
>
> On Tue, 31 Aug 2004 22:57:53 -0700, Eric "Shubes" <plug@shubes.net> wrote:
>
>>
>>elemint@theriver.com wrote:
>>
>>
>>>I want to create a 500 gig raid array using ide drives under Debian,
>>>does adaptec make the best/affordable or would 3 ware be the way to go?
>>>
>>>
>>>
>>>Jim
>>>
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>>
>>Jim,
>>Have you considered using linux software raid? It's more affordable
>>hardware wise. A bit of a learning curve, but not too bad. I set up an
>>ide raid 1 (mirror) usin RH9, and it was a breeze (entirely gui if you
>>do it on installation). I've yet to have a problem (knock wood), unlike
>>many stories I've heard of with hw raid. Don't know about doing it with
>>debian though. I imagine that from the cli it's the same.
>>
>>--
>>-Eric 'shubes'
>>"There is no such thing as the People;
>> it is a collectivist myth.
>> There are only individual citizens
>> with individual wills
>> and individual purposes."
>>-William E. Simon (1927-2000),
>> Secretary of the Treasury (1974-1977)
>> "A Time For Truth" (1978), pg. 237
>>
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>
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>
I thought is was easy under woody (on SPARC no less). Spend an hour in
the man page and in the Something for the PLUG Site Unix post I sent a
week ago and you'll master it in no time.
=======================================================================================
Linux: RAID Add Disk
mdadm /dev/mdx -a /dev/hdxn
=======================================================================================
Linux: RAID Build Set - 1 disk
mdadm -C /dev/mdx -l -n 2 /dev/hdxn missing
-l = RAID Level
-n = Number of devices
=======================================================================================
Linux: RAID Build Set - 2 disks
mdadm -C /dev/mdx -l -n 2 /dev/hdxn /dev/hdyn
-l = RAID Level
-n = Number of devices
=======================================================================================
Linux: RAID Remove Disk
mdadm /dev/mdx -r /dev/hdxn
=======================================================================================
Linux: RAID Status
# cat /proc/mdstat
The output of /proc/mdstat is as follows :
Personalities : [raid1]
read_ahead 1024 sectors
md0 : active raid1 sdb1[1] sda1[0] [2/2] [UU]
* The [UU] part above specifies that both the partitions on the Raid
Devices are up.
* If you get [_U] in place of [UU] then the First HDD is down and raid is
booting linux through the second HDD. Fix your first HDD problem and the
recreate RAID.
* [U_] indicate the Second HDD is down.
Ref:
http://puggy.symonds.net/~rajesh/raid.html
--
George Toft, CISSP, MSIS
AGD,LLC
www.agdllc.com
623-203-1760
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