disk monitoring

[Brandon Ooi]

nice, we still use mogilefs 1.0, and that didn't exist. cool new feature..

Brad Fitzpatrick wrote:
> Mogile best practices is to label them "MogileDev<n>", then do NOT put
> them in /etc/fstab at all, and let mogautomount do it all.
>
>
> On Tue, 1 May 2007, Brandon Ooi wrote:
>
>   
>> Hi Jared,
>>
>> you can label filesystems with a name such as "mog4"
>> i believe it's something like this...
>>
>>  > tune2fs -L mog4 /dev/sda
>>
>> or
>>
>>  > reiserfstune -l mog3 /dev/sdb
>>
>> once labeled, you can use the labels in fstab
>>
>> LABEL=mog3  /mogile_root/dev3  reiserfs defaults 0 0
>>
>> Jared Klett wrote:
>>     
>>> 	so far I've built all our MogileFS nodes with 3ware/AMCC
>>> controllers (we were using RAID-5 before Mogile) which do a great job of
>>> monitoring disks on a regular basis and sending e-mail notification when
>>> anything from a bad sector is detected to an entire drive failing.
>>>
>>> 	the downside is that when a drive *does* fail and the drive is
>>> replaced, the 3ware controller doesn't keep its internal unit IDs
>>> consistent, which then in turn causes devices in Linux to change, i.e.
>>> /dev/sdc fails and now /dev/sdd shifts to become /dev/sdc, which
>>> requires extremely careful manual remounting at the Mogile mount points.
>>>
>>> 	hope that makes sense... if anyone has a solution to avoid that,
>>> please let me know. :)
>>>
>>> 	anyway, in the past I've used homegrown scripts to do things
>>> like write a temporary file to the device to be checked, make sure the
>>> file exists, and send an alert e-mail if a problem arises during those
>>> operations.
>>>
>>> cheers,
>>>
>>> - Jared
>>>
>>>
>>>       
>>     
>
>