On Wed, 16 Jun 1999, Bruno Prior wrote:
> Software-RAID used to rely on kernel messages to tell it when a disk
> failed, which meant that you had to disconnect a disk while the system
> was running, or RAID wouldn't notice there was a problem. Is this not
> the case anymore?
the RAID code relies on the actual IO errors not error messages - but you
do not get an IO error even on SCSI until the controller _notices_ that
the disk has been disconnected. This typically happens when the first IO
command after the disconnect is issued to the drive. Hot-plug-safe
controllers of course issue messages to the OS immediately, but i suppose
the aformentioned test wasnt done on such a system.
-- mingo
