[parisc-linux] Corrections for RAID1 howto and Resyncing after failure

[Matthew Wilcox]

On Wed, Jul 09, 2003 at 10:29:08AM +0200, Joel Soete wrote:
> Yes read in <http://www.ibiblio.org/pub/Linux/docs/howto/other-formats/html_single/SCSI-2.4-HOWTO.html#mlproc>
> 
> that in Linux 2.4: "The SCSI subsystem does not support hot-plugging of SCSI
> devices ..."

True, it's pretty damn racy.  But if you're careful, it can work.
Let's hope we manage to make it better in 2.6 ... there's a pair of BOFs
in two weeks time at OLS (Hotplug & Linux SCSI) that should address this.

> Well I have no experience with hpux and those new 'hotplugable' devices but
> at least on Sun it doesn't mean that you can remove device(s) like this without
> taking care to power it off by software!!!

Well, no, you're always going to have to quiesce the device.  Otherwise it's
like turning the machine off without halting -- random things are cached and
simply never make it back to disc.

-- 
"It's not Hollywood.  War is real, war is primarily not about defeat or
victory, it is about death.  I've seen thousands and thousands of dead bodies.
Do you think I want to have an academic debate on this subject?" -- Robert Fisk