Adrian Sevcenco wrote:
> Ross Walker wrote:
>> On Jan 16, 2010, at 10:27 AM, Adrian Sevcenco
>> <Adrian.Sevcenco@xxxxxxx> wrote:
>>
>>> Hi!
>>> I have 2 identical hdd (1002FBYS) with the same firmware, etc ..
>>> really
>>> identical! when i try to add the second hdd to this raid1 array i have
>>> the message that /dev/sdb is not large enough to join array!!
>>> on the first hdd i have 100 mb unpartitioned at the end of disk (as i
>>> understood that mdadm put there some info...)
>>> Anyone, any idea what can be wrong? i already done this procees
>>> several
>>> times and this is first time i encounter this and i have no idea what
>>> can be the problem ..
>> Make sure the partitions are exactly the same, you can use sfdisk to
>> copy the table from a to b.
> well, i was doing raid over device (md_dX) but i found out the problem :
> even if there are "identical" devices, they have different number of
> blocks (hdparm output). how is this possible?
> is there a way to restrict the number of blocks that a hdd have?
> alternative would be just to clone the first hdd on the "smaller" one
> and then add the big one to and raid1 array ...
>
> Did someone seen this situation?
I've seen a case where single drive volumes initialized in different (but
identical) IBM 3550's with adaptec raid controlers would end up with slightly
different sizes and wouldn't match up if moved. I think this was a bios or
firmware difference but I'm not exactly sure. I was trying to clone disks and
just started over with the smaller source so it would work everywhere.
--
Les Mikesell
lesmikesell@xxxxxxxxx
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