Gordon Henderson wrote:
The current patch has config options to adjust the Non-Responsive-Disk-Timer. A zero specified no timeout and a non-zero value is the timeout in seconds.On Thu, 20 Jan 2005, Mark Bellon wrote:
I've seen this too. The worst case can actually last for over 2 minutes.
We've been running with a patch to the RAID 1 driver that handles this
so critical applications do not hang for too long. Basically it uses
timers in the RAID 1 driver to force the disk to be treated as actually
having failed if it doesn't respond within a reasonable time (tunable
but usually ~3 seconds). It then handles the I/O requests coming back
async. and does the clean up.
This is intersting, but make it an option (kernel compile, sysctl,
etc.)... I have a small home server/firewall that I run with the disks
spun down (noflushd) and spinning up a disk sometimes takes 8 seconds -
it's a RAID-1 set and seems to cope OK with the disks spinning down & up
again as required...
Let me pull a 2.4.26 kernel source and see how fast I can work up a patch. Or would it better to generate it against 2.4.29?
mark
Gordon
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