disk monitoring

[Brad Fitzpatrick]

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
> >
> >
>
>