Controlled shut-down of mdadm

Controlled shut-down of mdadm

[Graeme Gemmill]

On the (hopefully) rare occasions when my RAID server gets shut down, is 
it necessary or desirable to execute a mdadm --stop command in a 
shut-down script? Applications on other PCs may have files open, and if 
a prolonged mains break triggers a UPS shutdown, then there may be data 
loss (not that I'm running a reactor or a bank!).
Just a thought...
Regards to all
Graeme

Re: Controlled shut-down of mdadm

[Drew]

> On the (hopefully) rare occasions when my RAID server gets shut down, is it
> necessary or desirable to execute a mdadm --stop command in a shut-down
> script? Applications on other PCs may have files open, and if a prolonged
> mains break triggers a UPS shutdown, then there may be data loss (not that
> I'm running a reactor or a bank!).

Assuming by "other PCs" you mean you're sharing files to other
machines using CIFS (samba) or NFS, I wouldn't worry too much. Most
distro's usually do a shutdown of services before they stop the local
filesystems and raid array so any 'loss' of data is usually caused by
a user who hasn't saved their files before the server went offline.
Once the clients have been disconnected, the shutdown should handle
stopping the raid array just fine.


-- 
Drew

"Nothing in life is to be feared. It is only to be understood."
--Marie Curie