[BlueOnyx:15052] Re: DegradedArray event on /dev/md0

[Chris Gebhardt - VIRTBIZ Internet]

On 3/31/2014 10:18 AM, Gerald Waugh wrote:
> On 03/31/2014 09:57 AM, Gerald Waugh wrote:
>> On 03/31/2014 06:39 AM, RC Barker wrote:
>>> Hey Gerald,
>>> This is what I got
>>> [root at openx tmp]#  mdadm hotadd /dev/md0 /dev/sdb1
>>> mdadm: An option must be given to set the mode before a second device is
>>> listed
>>> [root at openx tmp]# mdadm /dev/md0 -a /dev/sdb1
>>> mdadm: cannot find /dev/sdb1: No such file or directory
>>> [root at openx tmp]#
>>>
>>> And this
>>> [root at openx tmp]# smartctl -a /dev/sdb
>>> smartctl 5.42 2011-10-20 r3458 [i686-linux-2.6.18-348.12.1.el5PAE]
>>> (local build)
>>> Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net
>>>
>>> Smartctl open device: /dev/sdb failed: No such device
>>> [root at openx tmp]#
>>> RC
>> check that sdb drive is connected properly. else looks like sdb may be kaput
>>
> more;
>
> You might look for errors here, and maybe older messages files
>     dmesg | grep sdb
>     cat /var/log/messages | grep sdb

Agreed.   It could be bad drive, failing controller, or as simple as a 
loose power or SATA cable.   I've seen all those things happen.

But drives do fail... it happens.

-- 
Chris Gebhardt
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